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HomeMy Public PortalAboutPlanning Board Packet 02/08/23Planning Board Madalyn Hillis -Dineen Chair Amanda Bebrin Vice Chair Robert Michaels Clerk Charlotte Degen Antone Freitas Elizabeth Taylor Alexander Wentworth Town Planner Jonathon Idman Senior Department Assistant Lynn St. Cyr Town of Brewster Planning Board 2198 Main St., Brewster, MA 02631 brewplan@brewster-ma.gov (508) 896-3701 x1133 PLANNING BOARD MEETING AGENDA 2198 Main Street (Remote Participation Only) February 8, 2023 at 6:30 PM Pursuant to Chapter 20 of the Acts of 2021, this meeting will be conducted in person and via remote means, in accordance with applicable law. This means that members of the public body may access this meeting in person, or via virtual means. In person attendance will be at the meeting location listed above, and it is possible that any or all members of the public body may attend remotely. No in -person attendance of members of the public will be permitted, and public participation in any public hearing conducted during this meeting shall be by remote means only. Members of the public who wish to access the meeting may do so in the following manner: Phone: Call (929) 436-2866 or (301) 715-8592. Webinar ID: 841 0778 1002. Passcode: 612505. To request to speak: Press *9 and wait to be recognized. Zoon:Webinar: https://us02web.zoom.us/j/84107781002?pwd=VTVSV 1ExaUNCL253NmNZV21Gdmo4dz09 Passcode: 612505. To request to speak: Tap Zoom "Raise Hand", then wait to be recognized. When required by law or allowed by the Chair, persons wishing to provide public comment or otherwise participate in the meeting, may do so by accessing the meeting remotely, as noted above. Additionally, the meeting will be broadcast live, in real time, via Live broadcast (Brewster Government TV Channel 18), Livestream (livestream.brewster-ma.gov), or Video recording (tv.brewster-ma.gov). The Planning Board packet can be found on the Planning Department page on the Town of Brewster website (www. brew ster-ma. gov). 1. Ca11 to Order. 2. Declaration of a Quorum. 3. Meeting Participation Statement. 4. Citizen's Forum. Members of the public are invited to address the Planning Board on matters not on the agenda during this time. The Planning Board asks that a 3 minute maximum comment period be respected by the speaker. In order to avoid any possible interpretation of a violation of the Open Meeting Law, the Planning Board will not provide comment in return to the speaker, however the item may be moved to a future agenda if discussion is deemed warranted. 5. Approval Not Required, Case No. 2023-01: Applicants/Owners: Duane Doolittle and Cristian O. Diaz Avalo through their representative Donald T. Poole, P.L.S. of Outermost Land Survey, Inc., seek endorsement of an Approval Not Required Plan for property located at 8 White Oak Trail and 7 and 9 Thousand Oaks Drive and shown on Tax Map 107, Parcels 20 and 21 respectively, within the Residential Low Density (R -L) Zoning District. The plan is pursuant to MGL c. 41 §81L and §81P and §290-4 of the Brewster Subdivision Rules and Regulations. The Planning Board will consider and potentially vote whether to endorse the Approval Not Required Plan. 6. Major Stormwater Management Permit, Case No. 2023-01: Applicant/Owner: Lisa Mullin through her representative John M. O'Reilly, P.E., P.L.S. of J.M. O'Reilly & Associates, Inc., has submitted an application for property located at Tubman Road, Lot 3 on Plan Book 698, Page 11 and formerly shown as part of Tax Map 55, Parcel 142. The Applicant seeks a major stormwater management permit to construct a single family dwelling and supporting improvements pursuant to Brewster Town Code Chapter 272 and its accompanying Regulations. The Planning Board will consider and potentially vote whether to approve the major stormwater permit, including any requested waivers. Planning Board Madalyn Hillis -Dineen Chair Amanda Bebrin Vice Chair Robert Michaels Clerk Charlotte Degen Antone Freitas Elizabeth Taylor Alexander Wentworth Town Planner Jonathon Idman Senior Department Assistant Lynn St. Cyr 7. Committee Reports. 8. For Your Information. 9. Matters Not Reasonably Anticipated by the Chair. 10. Next Meetings: February 22, 2023 and March 8, 2023. 11. Adjournment. Date Posted: 02/ 02/ 23 Date Revised: Received by Town Clerk: APPROVAL NOT REQUIRED CASE NO. 2023-01 APPLICANTS/OWNERS: DUANE DOOLITTLE AND CRISTIAN O. DIAZ AVALO PROPERTY: 8 WHITE OAK TRAIL AND 7 AND 9 THOUSAND OAKS DRIVE Town Of Brewster 2198 Main Street Brewster, Massachusetts 02631-1898 (508) 896-3701 x1133 STAFF REPORT Date: January 31, 2023 To: Planning Board From: Jon Idman, Town Planner Re: PB#2023-01: Request for `Approval Not Required' Plan Endorsement 8 White Oak Trail (Map 107 Pcl 20) 7& 9 Thousand Oaks Drive (Map 107 Pci 21) Office of: Planning Department Staff Recommendation Vote to endorse the plan/s entitled "Plan of Land #8 White Oak Trail, and #7&9 Thousand Oaks, Brewster MA, prepared for Duane Doolittle, #8 White Oak Trail, Deed Book 24005, Page 284, Lot B, Unrecorded "Holman" Plan, dated 11/1/1979, and, Cristian O. Diaz Avalo, Ctf. 213697, Lot 21, LCP 382231-B (sic), and Lot 1, LCP 37715-A, Scale 1"=40'," dated September 20, 2022, prepared and stamped by Donald T. Poole, PLS, Outermost Land Survey, Inc., as it does not depict a subdivision and thus does not require approval under the subdivision control law. Discussion The respective owners of the above -referenced, abutting properties have submitted a plan of land to the Board for endorsement which shows a division of two existing lots into four parcels. The division would facilitate a land swap of the parcels between the owners allowing for a reconfiguration of the respective building lots. The reconfiguration will result in two total building lots- the same number (and each with the same lot area) that currently exist. The existing building lots are positioned `north -south,' divided by the centerline of so-called `Old Freeman's Way.' The proposed building lots would be side -by -side. The division involves both `unregistered' and `registered' land, thus the applicants have submitted two plans for endorsement depicting the same proposed division and reconfiguration- one for division of the registered land for filing with the Land Court, prepared according to the Land Court's specific rules, and the other for recording at the Barnstable Registry of Deeds. The plan is styled as an "Approval Not Required" (ANR) plan per MGL Ch. 41 ss. 81L & 81P and Section 290-4 of the Brewster Subdivision Rules and Regulations, i.e. the applicant maintains that no subdivision approval is required for the land division because the plan does not depict a `subdivision' as defined under the subdivision control law. It is axiomatic that if a plan does not depict a subdivision, then no subdivision approval is required. There are several bases under the subdivision control law that warrant or allow ANR endorsement. In the case at hand, the proposed land division is not a subdivision so -defined and an ANR endorsement is warranted because each of the two proposed lots as constituted and reconfigured contains at least the minimum 150 ft. lot frontage as is required under the Brewster Zoning Bylaw in the R -L residential PB2023-01 Staff Report Page 1 zoning district (i.e. along Freeman's Way, an improved public/ town way, White Oak Trail, an improved private subdivision road, or Thousand Oaks Drive, an improved private subdivision road) and the constituent parcels created by the division are not separately buildable. Though the two proposed lots as constituted and reconfigured appear to comply with zoning pursuant to Section 179-27B of the Brewster Zoning Bylaw, which allows certain abutting nonconforming residential building lots to be reconfigured 'by right,' the Board's endorsement does not itself imply zoning compliance (other than as to lot frontage) or represent the buildability of the lots; these zoning issues are beyond the scope and authority of the Board under a request for ANR endorsement. A note to this effect has been added to the plan. PB2023-01 Staff Report Page 2 Brewster Planning Board 2198 Main Street Brewster, MA 02631-1898 (508) 896-3701 x1133 brewplan@brewster-ma.gov Date & Time Received Town Clerk's Office FORM A APPLICATION FOR ENDORSEMENT OF PLAN BELIEVED NOT TO REQUIRE APPROVAL (ANR) Please provide twelve (12) copies of this application along with ten (10) 11" x 17" sized plans and two (2) 24"x 36" sized plans along with one (1) Mylar. Please also provide an electronic copy of the application and any plans in pdf format. Date: 1)//23 Application # U� ''' t To the Planning Board: The undersigned believing that the accompanying plan of his property in the Town of Brewster does not constitute a subdivision within the meaning of the Subdivision Control Law, herewith submits said plan for a determination and endorsement that Planning Board approval under this Subdivision Control Law is not required. Name of Applicant: Duane Doolittle Address: 8 White Oak Trail Phone: 774-216-0754 Email: ddoolittle689@yahoo.com Owner, if different: and Cristian O. Diaz Avalo Phone: Address: 7-9 Thousand Oaks Drive Name of Surveyor/Engineer: Donald T. Poole Company Name: Outermost Land Survey, Inc. Address: 46 Main St.Brewster, MA 02631 Email: ocazoinc@hotmail.com Phone: 508-255-0477 Email: dpoole@outermostlandsurvey.com Location and description of Property: 8 White Oak Trail and 7-9 Thousand Oaks Drive 2 Residential properties Map 107 Lot 20 and 21 Zoning District RL Deed of property recorded in Barnstable County Registry Or Land Court Certificate of Title No. 213697 Current number of lots 2 Book: 24005 Page: 284 Proposed number of lots 4 Please provide a one -page description of the purpose off the ANR appli tion. Signature of Owner or Authorized Representative: If not Owner. please attach Agent Affidavit. Revised 05-2018 ANR Application Page 1 of 2 January 9, 2023 Brewster Planning Board Re: 7-9 Thousand Oaks Drive To the Brewster Planning Board, I authorize Outermost Land Survey, Inc to represent me in the submittal of an Approval Not Required application and plan of 8 White Oak Trail and 7-9 Thousand Oaks Drive Please don't hesitate to contact me or Donald T. Poole at 508-255-0477 with any questions. Sincerely, Cristian 0 Dias Avalo 46 Main Street, Brewster MA 02631 • Ph. 508-255-0477 o utermostlandsurvey.com January 19, 2023 Brewster Planning Board Town of Brewster 2198 Main Street Brewster, MAdf631 Dear Planning Board Members, The purpose of the attached Approval Not Required application and plan is to revise the interior property line between the two lots. Sincerely, Donald T. Poole, P.L.S. 46 Main Street, Brewster MA 02631 • Ph. 508-255-0477 o utermostlandsurvey. com I hereby certify that this plan conforms Registers of Deeds adopted Jan Donald T. Poole PLS #32662 1,1976, -• o 0,<, ,cII ) C13 •i a V- 1 Y of the >, // o co d-• o d- M tirt �` .0 • 6' -A N -a Approval under the Subdivision Control Law is NOT Required Brewster Planning Board: Date 2 v 0- I� b N v o `� mil\ -A - h ,. o. LOCUS Q� --I 4 % BREWJSTER! I f% o -s' 1 property line between the the same as before the land 179-27B. The frontage Oaks Drive M. Racette # 141086 LCP 38321-B ° 2`{90 Sq.Ft. 0.89 Acres N \ �� N \ t. N \ N Plan Note: 1) The purpose of this plan is to revise the interior #24 White Oak Trail an equal area swap of land that leaves the area Mark W. & Deborah A. Dru an which is allowed by right under Zoning Bylaw section g compliance with the Zoning Bylaws. Ctf. # 214501 Lot 2, LCP 37715-A 2) Zoning District is Resd- Low (RL) Lot 20 LCP 38321-B 3) Endorsement does not imply zoning compliance �� 330„F • 7o• N #25 Thousand N Diane Ctf. \N Lot 22, Ao,o ��� \N 226,, S>3o484 <3 2 2' �0 6� \\ \ ¢,, 62' 6+ N -o s4/ \Shed IN \ \ ay 0 Deck ij 33,053± Sq.FT. \ \c5) or 0.76 Acres \ \ #7&9 o - \ \ N) \aF 78895' 0� �' \ \s •,:.( " ;\/ \ \ 38,705± \ \ or Stock F aae Feoce N reeman 3 S7.<9„.0,,,7o„F N ay ~ a. k. a 39' 89' 222• 9' -owl., Orr/o ans Road , oto• /954. afoul, Plan of Land #8 White Oak Trail, and #7&9 Thousand Oaks Drive Brewster, MA prepared for Duane Doolittle, #8 White Oak Trail Deed Book 24005, Page 284 Lot B, Unrecorded "Holman" plan, dated 11/1/1979, and, Cristian O. Diaz Avalo Ctf. 213697 Lot 21, LCP 382331-B, and Lot 1, LCP 37715-A Scale 1" = 40' Sept 20, 2022 C o I s# 1120001 0 40 80 120 LOCUS two lots with swap, is in o ti o N 5Q \ Map O N ea O (1) 0 . o _ O o 0 O Q o Q , �` (not to 0 1 .P 0 �' --' scale) For Registry Use Only to the Rules and Regulations and amended Jan. 7 1988. Date R:,i a . P� 6F MASSq��G P��N 4S DONALD T. POOLE No. 32662 J� SS��NAL E R M O S 0 T #46 Main Street Brewster, MA 02631 508-255-0477 '1 NO SURVEY \ �G LANO _ _ _ 1-7 Plan Note: 1) The purpose of this plan is to revise the interior property line between the two lots with . i ■r�w� an equal area swap of land that leaves the area the same as before the land swap, which is allowed by right under Zoning Bylaw section 179-27B. The frontage is in .0 h compliance with the Zoning Bylaws. LOCUS ,� 2) Zoning District is Resd- Low RL �"r��*► 7 BREWSTE 3) Endorsement does not imply zoning compliance -4 o , #24 White Oak Trail N Mark W. & Deborah A. Drugan v Rrenstt Su#P1 7- Ctf. # 214501 107 O O - Lot 2, LCP 37715-A Lot 20 LCP 383218321-B 0 *y � ' - , , 111 X 1 N ¢'7 ,, N 1608, \ (� LOCUS Map (not to scale) Lott O 110 10 4/7?,,, 8�2 �3,7t s A I #25 Thousand Oaks Drive .p "0 8y 78, Diane M. Racette O Z. N Lot 20 , Ctf. # 141086 'p �o P C D 383 Lot 22, LCP 38321-B G �NN �7 105 2j�B 2520 co co N\ �<CAu' o CB with "X" in CD . center, Found corn >; 2� N ,� �' 7�6�' (OUT) 6N cn 9'- I o 7,3, 0.31' 53, NO 11 1 \ - rt Q 5 ` 6.84' x118 N1 17 CB with "X" in CB with "X" in center, Found N 82.34 13" E rn LOT 33 `�.18�2' center, lhFound 4's 130 59 9Ssr- 18 center, Found (GOOD) ' '/ _ r L3` Ile 57' Area = 8,377± Sq.Ft. t� Sze• �.� 382 \ \ (OUT) 116 (OUT) 8 92.41' �'� r� a) a . SrO, ��\ ¢¢\ 15 AO ,9e 124 2- \ Sr S 8/58'2 pryp .sue p �\ 16 •�9, W 043 > ( �. /„ E .(‘) ./• �. ' �,- \\ 20 112 > 9 \ 23,3 07 • 4. �- *- I cD In o -7_ 119 2�� 63 CB with Drill D • • \ b p 6.99' o ' Deck u� O ss>'o?o ---,So 3, �`���`�8.25' 0'�1Nti #7&9 .2448.9' I Z 0 (OUT) FoundHole, emu' S63o06gA ' o �`. cfl .0 0<27, �, SQ �' \ \ 2 5� 6� ?9 I 201 �� E 106 k) CO 6,Q0 �' , 5 LS' s 6�° 919E N Radial 3 N a 117 113 >Q� X79„ �� L. S 5.69' _ 72j49,7g82q, - _ 20 N7 o J„.9.4., 8 o„ ' 6.39' '� o o �6' a \ 0) o e �s O o v CO t> W rn ���1 00 6895, ��� `per y Area 280478 Sq.Ft. ,\\'' h oNe) 11 Il tz Q NJJ3gO' Blockade 22 \ \ ��0 Free 57 53, ence 2 CB with "X" in n7anI 5,25C N W O - ,-_-) Approval under the Subdivision Control Law is NOT Required PP Brewster Planning Board: Date 8 s� 70»F 3 N ' way a 'k a. S 9•89, \ � ��� w center, Found 14 R'd�ar (OUT) • 13 S'•"••°9•76-, 2 ' O O N °Uth Or/ fan N '_2� s fob 8°32 F 68.32'26" 10 1 01, 109 a' • �^ 123 26 122 iZ CB with ,.X„ in center, Found (GOOD) ��• 19SS f 114 R' �O� LaYOUt 19 �� 18 018' P' 115 Plan of Land #8 White Oak Trail, and #7&9 Thousand Oaks Drive Brewster, MA I certify that as of the date of this survey, the monuments controlling prior plans are in the prepared for ground as shown and described hereon. I further certify that any additional monuments shown hereon have been set in accordance with the Land Court Instructions of 2006 as of the date Duane Doolittle, #8 White Oak Trail of this survey. Deed Book 24005, Page 284 and, I certify that this plan was drawn from an actual survey made on the ground in Lot B, Unrecorded "Holman" plan, dated 11/1/1979, and, accordance with the Land Court Instructions of 2006 on or between Sept. 16, 2022 and Sept 23, 2022 Cristian O. Diaz Avalo Ctf. 213697 �( SDonald E R M T. Poole PLS #32662 Date Lot 21, LCP 382331-B, and Lot 1, LCP 37715-A o r#46 Main Street ELE Scale 1" = 40' Sept 20 2022 Brewster, r #1120001 MA 02631 508-255-0477 �ols �aUnadjusted Error of Closure = 1/123,416, or 0.01 N 61°48'06" E �EDM Verification: 1,410.70 Published Baseline vs. 1,410.71 Measured ` 0 40 80 120ANDS SURVE MI — I= — N MAJOR STORMWATER MANAGEMENT PERMIT CASE NO. 2023-01 APPLICANT/OWNER: LISA MULLIN PROPERTY: TUBMAN ROAD, LOT 3 ON PLAN BOOK 698, PAGE 11 TO: FROM: RE: DATE: Town of Brewster 2198 Main Street Brewster, MA 02631-1898 Phone: (508) 896-3701 x. 1133 STAFF REPORT Planning Board Jon Idman, Town Planner Major Stormwater Permit SWMP23-1 Mullin, Tubman Road, Lot 3, Plan Book 698 Page 11 January 31, 2023 Office of: Planning Board Planning Dept. Recommendation The stormwater permit application meets the applicable performance standards and submission requirements set out in the town's Stormwater Management Regulations for issuance and approval of a Major Stormwater Permit, subject to the waiver requested. The waiver requested from full compliance with the stormwater treatment standards in Regulations Section 6.2.B.(6) is consistent with the waiver criteria set out in Section 5.10 of said Regulations Approval should be granted subject to the continuing obligations set out in said Regulations, including Sections 5.7, 5.8, 5.9 (Certificates of Compliance), Section 7.2 (Inspections), 8.3 (Recording of stormwater permit and O&M plan) and 8.5 therein. Background The property is located on the southwest side of Tubman Road as a newly created ANR lot. The underlying project is the construction of a new single-family home and supporting improvements on a currently undeveloped lot. The site slopes generally to the north. There are no floodplains, Zones of Contribution or wetlands on the property or that affect the proposed development. This project triggers a Stormwater Permit under Chapter 272 of the Brewster Code (Stormwater Management Bylaw) and according to Section 4 of the Bylaw's supporting regulations, a Major Stormwater Permit is required because the project involves net new impervious surface of 2500 sq ft or greater. Because the project is not within wetlands jurisdiction, the Planning Board is the stormwater permitting authority. Major Stormwater Permits are subject to review at a public meeting, including for any waivers requested. Discussion Section 6.1B of the Stormwater Management Regulations sets out construction -period, erosion and sedimentation control performance standards and BMPs for Major stormwater permits. Section 6.2B of the Stormwater Management Regulations sets out post -construction management performance standards and BMPs for Major Stormwater Permits, including specific standards related to new construction. Section 8.2 of the Stormwater Management Regulations sets out post -construction operations and maintenance (O&M) requirements for Major stormwater permits. 1 Appendix B of the Stormwater Management Regulations sets out submission requirements for Major Stormwater Permits, including a site plan set, O&M plan and stormwater report. The Applicant has submitted the documents and information required in the Regulations, prepared consistent with the Regulations. Among other things, as required, the submissions include a long-term O&M plan and an erosion and sedimentation control plan for construction. The Applicant's proposed construction -period controls and post -construction stormwater management system meet the applicable performance standards in the Regulations. • Major Stormwater Permit applications are required to meet, at a minimum, the standards in the Massachusetts Stormwater Handbook. Additionally, under the Town's Regulations, stormwater management systems are supposed to incorporate Low Impact Development -type (LID) stormwater design elements, construction -period Best Management Practices (BMPs) to control erosion and sedimentation, and post -construction Best Management Practices (BMPs) that address water quality, including TSS and nutrient removal levels higher than in the Massachusetts Stormwater Handbook. The proposed stormwater system was designed in consideration of and consistent with these standards and techniques, subject to one waiver requested. • The waiver requested by the Applicant is sought from strict compliance with the 60% Total Phosphorus removal requirement in Regulations Section 6.2.B.(6). The waiver appears to be consistent with the criteria in Regulations Section 5.10: o some removal is provided in the grass channel, which is a LID -type BMP; o the proposed system meets the treatment standards in the Massachusetts Stormwater Handbook; o the proposed system meets the purposes and intent of the Stormwater Management Bylaw, including adequate protection of public health and safety; o and full compliance is impracticable given the slope of the site relative to the system location and unnecessary given the absence of sensitive resources like wetlands or Zone IIs on locus or affecting locus. o Creating a swale to increase run-off retention and Phosphorus treatment would detrimentally affect the safety and stability of the driveway and require more intense site disturbance. • The project is designed to retain a minimum 1" run-off water quality volume of the total proposed pavement. • Stormwater run-off from the dwelling is proposed to be handled and infiltrated separately from the site run-off through gutters, downspouts and dedicated subsurface roof recharge systems sized for the 100 -year storm event. • Other run-off from the site will flow through a number of conveyances, including a grass channel LID BMP, and ultimately be treated and infiltrated in a subsurface leaching facility sized for the 100 -year storm event. • The stormwater management system was designed under post -development conditions to handle all storms' peak discharges and runoff volume for the 2, 10, 25 and 100 -year storm events. • As designed, post -development offsite volume and runoff rates are reduced to less than the pre - development conditions including for the 100 -year storm. • Erosion control provisions during construction includes a straw wattle barriers down -gradient on the property. • The O&M deals with long term maintenance of all post construction BMPs such as the subsurface recharge systems. 2 ����� J.M. O'REILLY & ASSOCIATES' INC. PROFESSIONAL ENGINEERING, LAND SURVEYING & ENVIRONMENTAL SERVICES Site Development • Property Line • Subdivision • Sanitary • Land Court • Environmental Permitting February 1, 2023 JMO tt9364 Brewster Planning Board 2198 Main Street Brewster, MA 02631 RE: Lot 3 Tubman Road, Brewster Map: 55 / Parcel 142-3 Owner: Lisa Mullin Dear Board Members, On behalf of our client, Ms. Lisa Mullin, JM O'REILLY & ASSOCIATES INC., is requesting the waiver from the Phosporous treatment requirement, within Brewster's Stormwater Regulations, for the proposed construction of the single family dwelling at the above referenced property. As reflected on the project site plan, the parcel is sloped down to Tubman Road. The amount of grading, which would be necessary to reach the treatment levels required within the local stormwater regulations, would be significant to the parcel. The property is not within an area which would warrant the level of treatment. The parcel Is not within a Zone 2 of a drinking water well or there are no wetland resources within 100 feet of the parcel. The parcel is within the Cape Cod Bay estuary. The project is designed to reach a TSS removal of about 93%, while utilizing the grassed conveyance channel, a deep sump catch basin with hood and the subsurface disposal system. For these reasons, we are respectively requesting the necessary waiver from the enhanced treatment outlined in the regulations. Please feel free to call me if you have any questions. Very truly yours, J.M. O'REILLY & ASSOCIATES, INC. John M. Reilly, P.E., P Principal CC: Owner 1573 MAIN STREET, P.O. Box 1773, BREWSTER, MA 02631 • PHONE: (508) 896-6601 • FAX: (508) 896-6602 W WW.JMOREILLYASSOC.COM Town of Brewster Code Chapter 272 Stormwater Management Permit Application Form 1. Project Location: LOT 3, TUBMAN ROAD FOR TOWN OFFICIAL USE ONLY TOWN CLERK RECEIVED: SWM PERMIT NUMBER• $S4C 9 ;11;11,' f:. R:, Street Address MAP 55, PARCEL 142-3 BOOK 35437, PAGE 80 Assessors Map and Parcel(s) Deed Reference 2. Applicant: LISA MULLIN Name P.O. BOX 1269, BREWSTER, MA Legal Mailing Address 508-241-4224 Phone Number 3. Property Owner (if different than Applicant): SAME 4jmullin@comcast.net Email Address Name Legal Mailing Address Phone Number Email Address 4. Professional Representative: J.M. O'REILLY & ASSOCIATES, INC, JOHN O'REILLY, P.E., P.L.S. Name P.O. BOX 1773, BREWSTER, MA 02631 Legal Mailing Address 508-896-6601 joreilly@jmoreillyassoc.com Phone Number Email Address Brewster Stormwater Management Permit Application Form Approved 2/23/ 2022 Rev, 06/22/2022 Page 1 of 2 5, Type of Application (Check as applicable): Minor Stormwater Permit- Any combination or series of construction or land disturbance activities that, over a two-year period, will result in a net increase in impervious area of 500 sq.ft. to 2,500 sq.ft, and/or will result in land disturbances of 10,000 sq.ft. to 20,000 sq.ft. Major Stormwater Permit- Any alteration, disturbance, development, or redevelopment that does not meet the eligibility criteria for a Minor Stormwater Permit, SWM Permit Amendment - List existing Stormwater Management permit number/ type Stormwater Management Certificate of Compliance (SMCC) Request - List relevant Stormwater Management permit number 6. Brief Project Description, including any waiver requests: Project is to construct a single family dwelling on a vacant parcel on Tubman Road. Drainage is designed to accept up to the 100 -year storm event. Refer to Site Plan and Stormwater Report. 7. Signatures: Lisa Mullin Applicant Date Property Owner (If different than Applicant) Date Professional Reprc rative (as applicable Date NOTES: • Please refer to Appendix 8 of the Stormwater Management Regulations for detailed application submittal and supporting material requirements for Minor and Major Stormwater Management Permits, respectively. • The application fee schedule is contained in Appendix C of the Regulations. • Certain activities are exempt from review and permitting (See §272-6 of the Stormwater Management Bylaw). • If the protect is located, In whole or part, within an area subject to state or local wetlands protection law, the review and permitting authority is the Brewster Conservation Commission/Conservation Department, • No permit review shall occur nor shall review periods commence until the application is deemed complete. Approved 2/23/ 2022 Rev. 06/22/2022 Page 2 of 2 Brewster Stormwater Management Permit Application Form Post-Development Recharge Pre-Development Recharge 1Ex Existing Parcel Area 1S Roof Runoff 2S Gravel Driveway & Landscape Aras 3S Undeveloped Areas of Parcel 1Dis Pre- Dev Peak Discharge 4R POST DEVELOPMENT PEAK DISCHARGE 1P One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System 2P One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System CB1 CB Roof Leader - 6" ADS Pipe CB2 CB Catch Basin At Lower Driveway Routing Diagram for 9364.MULLIN - TUBMAN ROAD - VACANT LOT Prepared by J M O'Reilly & Associates Inc, Printed 1/24/2023 HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link 9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 2HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 0.115 39 >75% Grass cover, Good, HSG A (2S) 0.078 76 Gravel roads, HSG A (2S) 0.027 98 Roof Area (1S) 2.592 30 Woods, Good, HSG A (1Ex, 2S, 3S) 9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 3HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 2.785 HSG A 1Ex, 2S, 3S 0.000 HSG B 0.000 HSG C 0.000 HSG D 0.027 Other 1S Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 4HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1Ex: Existing Parcel Area Runoff = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Reach 1Dis : Pre- Dev Peak Discharge Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.60" Area (sf) CN Description 61,160 30 Woods, Good, HSG A 61,160 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 1Ex: Existing Parcel Area Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 1 0 Type III 24-hr 2-Year Rainfall=3.60" Runoff Area=61,160 sf Runoff Volume=0.000 af Runoff Depth=0.00" Tc=6.0 min CN=30 0.00 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 5HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1Ex: Existing Parcel Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.11 0.00 0.00 3.50 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.18 0.00 0.00 5.00 0.20 0.00 0.00 5.50 0.23 0.00 0.00 6.00 0.26 0.00 0.00 6.50 0.29 0.00 0.00 7.00 0.33 0.00 0.00 7.50 0.37 0.00 0.00 8.00 0.41 0.00 0.00 8.50 0.46 0.00 0.00 9.00 0.52 0.00 0.00 9.50 0.60 0.00 0.00 10.00 0.68 0.00 0.00 10.50 0.78 0.00 0.00 11.00 0.90 0.00 0.00 11.50 1.07 0.00 0.00 12.00 1.80 0.00 0.00 12.50 2.53 0.00 0.00 13.00 2.70 0.00 0.00 13.50 2.82 0.00 0.00 14.00 2.92 0.00 0.00 14.50 3.00 0.00 0.00 15.00 3.08 0.00 0.00 15.50 3.14 0.00 0.00 16.00 3.19 0.00 0.00 16.50 3.23 0.00 0.00 17.00 3.27 0.00 0.00 17.50 3.31 0.00 0.00 18.00 3.34 0.00 0.00 18.50 3.37 0.00 0.00 19.00 3.40 0.00 0.00 19.50 3.42 0.00 0.00 20.00 3.45 0.00 0.00 20.50 3.47 0.00 0.00 21.00 3.49 0.00 0.00 21.50 3.51 0.00 0.00 22.00 3.53 0.00 0.00 22.50 3.55 0.00 0.00 23.00 3.57 0.00 0.00 23.50 3.58 0.00 0.00 24.00 3.60 0.00 0.00 24.50 3.60 0.00 0.00 25.00 3.60 0.00 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 6HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Roof Runoff Runoff = 0.10 cfs @ 12.08 hrs, Volume= 0.008 af, Depth= 3.37" Routed to Pond CB1 : Roof Leader - 6" ADS Pipe Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.60" Area (sf) CN Description * 1,184 98 Roof Area 1,184 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 1S: Roof Runoff Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type III 24-hr 2-Year Rainfall=3.60" Runoff Area=1,184 sf Runoff Volume=0.008 af Runoff Depth=3.37" Tc=6.0 min CN=98 0.10 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 7HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Roof Runoff Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.01 0.00 3.00 0.11 0.02 0.00 3.50 0.13 0.03 0.00 4.00 0.15 0.04 0.00 4.50 0.18 0.06 0.00 5.00 0.20 0.07 0.00 5.50 0.23 0.09 0.00 6.00 0.26 0.11 0.00 6.50 0.29 0.14 0.00 7.00 0.33 0.17 0.00 7.50 0.37 0.20 0.00 8.00 0.41 0.24 0.00 8.50 0.46 0.28 0.00 9.00 0.52 0.34 0.00 9.50 0.60 0.41 0.00 10.00 0.68 0.48 0.00 10.50 0.78 0.58 0.01 11.00 0.90 0.69 0.01 11.50 1.07 0.86 0.01 12.00 1.80 1.58 0.06 12.50 2.53 2.30 0.02 13.00 2.70 2.47 0.01 13.50 2.82 2.59 0.01 14.00 2.92 2.69 0.01 14.50 3.00 2.77 0.00 15.00 3.08 2.84 0.00 15.50 3.14 2.91 0.00 16.00 3.19 2.96 0.00 16.50 3.23 3.00 0.00 17.00 3.27 3.04 0.00 17.50 3.31 3.08 0.00 18.00 3.34 3.11 0.00 18.50 3.37 3.14 0.00 19.00 3.40 3.16 0.00 19.50 3.42 3.19 0.00 20.00 3.45 3.21 0.00 20.50 3.47 3.23 0.00 21.00 3.49 3.26 0.00 21.50 3.51 3.28 0.00 22.00 3.53 3.30 0.00 22.50 3.55 3.32 0.00 23.00 3.57 3.33 0.00 23.50 3.58 3.35 0.00 24.00 3.60 3.37 0.00 24.50 3.60 3.37 0.00 25.00 3.60 3.37 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 8HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Gravel Driveway & Landscape Aras Runoff = 0.00 cfs @ 16.70 hrs, Volume= 0.001 af, Depth= 0.03" Routed to Pond CB2 : Catch Basin At Lower Driveway Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.60" Area (sf) CN Description 10,000 30 Woods, Good, HSG A 3,400 76 Gravel roads, HSG A 5,000 39 >75% Grass cover, Good, HSG A 18,400 41 Weighted Average 18,400 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 2S: Gravel Driveway & Landscape Aras Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0 0 Type III 24-hr 2-Year Rainfall=3.60" Runoff Area=18,400 sf Runoff Volume=0.001 af Runoff Depth=0.03" Tc=6.0 min CN=41 0.00 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 9HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Gravel Driveway & Landscape Aras Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.11 0.00 0.00 3.50 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.18 0.00 0.00 5.00 0.20 0.00 0.00 5.50 0.23 0.00 0.00 6.00 0.26 0.00 0.00 6.50 0.29 0.00 0.00 7.00 0.33 0.00 0.00 7.50 0.37 0.00 0.00 8.00 0.41 0.00 0.00 8.50 0.46 0.00 0.00 9.00 0.52 0.00 0.00 9.50 0.60 0.00 0.00 10.00 0.68 0.00 0.00 10.50 0.78 0.00 0.00 11.00 0.90 0.00 0.00 11.50 1.07 0.00 0.00 12.00 1.80 0.00 0.00 12.50 2.53 0.00 0.00 13.00 2.70 0.00 0.00 13.50 2.82 0.00 0.00 14.00 2.92 0.00 0.00 14.50 3.00 0.00 0.00 15.00 3.08 0.00 0.00 15.50 3.14 0.00 0.00 16.00 3.19 0.01 0.00 16.50 3.23 0.01 0.00 17.00 3.27 0.01 0.00 17.50 3.31 0.01 0.00 18.00 3.34 0.01 0.00 18.50 3.37 0.02 0.00 19.00 3.40 0.02 0.00 19.50 3.42 0.02 0.00 20.00 3.45 0.02 0.00 20.50 3.47 0.02 0.00 21.00 3.49 0.02 0.00 21.50 3.51 0.03 0.00 22.00 3.53 0.03 0.00 22.50 3.55 0.03 0.00 23.00 3.57 0.03 0.00 23.50 3.58 0.03 0.00 24.00 3.60 0.03 0.00 24.50 3.60 0.03 0.00 25.00 3.60 0.03 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 10HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Undeveloped Areas of Parcel Runoff = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Reach 4R : POST DEVELOPMENT PEAK DISCHARGE Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.60" Area (sf) CN Description 41,760 30 Woods, Good, HSG A 41,760 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 3S: Undeveloped Areas of Parcel Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 1 0 Type III 24-hr 2-Year Rainfall=3.60" Runoff Area=41,760 sf Runoff Volume=0.000 af Runoff Depth=0.00" Tc=6.0 min CN=30 0.00 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 11HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: Undeveloped Areas of Parcel Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.11 0.00 0.00 3.50 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.18 0.00 0.00 5.00 0.20 0.00 0.00 5.50 0.23 0.00 0.00 6.00 0.26 0.00 0.00 6.50 0.29 0.00 0.00 7.00 0.33 0.00 0.00 7.50 0.37 0.00 0.00 8.00 0.41 0.00 0.00 8.50 0.46 0.00 0.00 9.00 0.52 0.00 0.00 9.50 0.60 0.00 0.00 10.00 0.68 0.00 0.00 10.50 0.78 0.00 0.00 11.00 0.90 0.00 0.00 11.50 1.07 0.00 0.00 12.00 1.80 0.00 0.00 12.50 2.53 0.00 0.00 13.00 2.70 0.00 0.00 13.50 2.82 0.00 0.00 14.00 2.92 0.00 0.00 14.50 3.00 0.00 0.00 15.00 3.08 0.00 0.00 15.50 3.14 0.00 0.00 16.00 3.19 0.00 0.00 16.50 3.23 0.00 0.00 17.00 3.27 0.00 0.00 17.50 3.31 0.00 0.00 18.00 3.34 0.00 0.00 18.50 3.37 0.00 0.00 19.00 3.40 0.00 0.00 19.50 3.42 0.00 0.00 20.00 3.45 0.00 0.00 20.50 3.47 0.00 0.00 21.00 3.49 0.00 0.00 21.50 3.51 0.00 0.00 22.00 3.53 0.00 0.00 22.50 3.55 0.00 0.00 23.00 3.57 0.00 0.00 23.50 3.58 0.00 0.00 24.00 3.60 0.00 0.00 24.50 3.60 0.00 0.00 25.00 3.60 0.00 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 12HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1Dis: Pre- Dev Peak Discharge Inflow Area = 1.404 ac, 0.00% Impervious, Inflow Depth = 0.00" for 2-Year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Reach 1Dis: Pre- Dev Peak Discharge Inflow Outflow Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 1 0 Inflow Area=1.404 ac 0.00 cfs 0.00 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 13HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 1Dis: Pre- Dev Peak Discharge Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.00 0.00 12.50 0.00 0.00 13.00 0.00 0.00 13.50 0.00 0.00 14.00 0.00 0.00 14.50 0.00 0.00 15.00 0.00 0.00 15.50 0.00 0.00 16.00 0.00 0.00 16.50 0.00 0.00 17.00 0.00 0.00 17.50 0.00 0.00 18.00 0.00 0.00 18.50 0.00 0.00 19.00 0.00 0.00 19.50 0.00 0.00 20.00 0.00 0.00 20.50 0.00 0.00 21.00 0.00 0.00 21.50 0.00 0.00 22.00 0.00 0.00 22.50 0.00 0.00 23.00 0.00 0.00 23.50 0.00 0.00 24.00 0.00 0.00 24.50 0.00 0.00 25.00 0.00 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 14HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Inflow Area = 0.959 ac, 0.00% Impervious, Inflow Depth = 0.00" for 2-Year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Inflow Outflow Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 1 0 Inflow Area=0.959 ac 0.00 cfs 0.00 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 15HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.00 0.00 12.50 0.00 0.00 13.00 0.00 0.00 13.50 0.00 0.00 14.00 0.00 0.00 14.50 0.00 0.00 15.00 0.00 0.00 15.50 0.00 0.00 16.00 0.00 0.00 16.50 0.00 0.00 17.00 0.00 0.00 17.50 0.00 0.00 18.00 0.00 0.00 18.50 0.00 0.00 19.00 0.00 0.00 19.50 0.00 0.00 20.00 0.00 0.00 20.50 0.00 0.00 21.00 0.00 0.00 21.50 0.00 0.00 22.00 0.00 0.00 22.50 0.00 0.00 23.00 0.00 0.00 23.50 0.00 0.00 24.00 0.00 0.00 24.50 0.00 0.00 25.00 0.00 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 16HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Inflow Area = 0.027 ac,100.00% Impervious, Inflow Depth = 3.37" for 2-Year event Inflow = 0.10 cfs @ 12.08 hrs, Volume= 0.008 af Outflow = 0.04 cfs @ 12.32 hrs, Volume= 0.008 af, Atten= 63%, Lag= 14.2 min Discarded = 0.04 cfs @ 12.32 hrs, Volume= 0.008 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 58.38' @ 12.32 hrs Surf.Area= 164 sf Storage= 42 cf Plug-Flow detention time= 5.1 min calculated for 0.008 af (100% of inflow) Center-of-Mass det. time= 5.1 min ( 759.1 - 754.0 ) Volume Invert Avail.Storage Storage Description #1 58.00' 130 cf 8.25'W x 19.90'L x 3.00'H Prismatoid 493 cf Overall - 203 cf Embedded = 290 cf x 45.0% Voids #2 58.00' 203 cf 4.25'W x 15.90'L x 3.00'H Prismatoid Inside #1 333 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 58.00'8.270 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.04 cfs @ 12.32 hrs HW=58.38' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Inflow Discarded Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=0.027 ac Peak Elev=58.38' Storage=42 cf 0.10 cfs 0.04 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 17HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Discarded Stage-Discharge Discharge (cfs) 0.060.0550.050.0450.040.0350.030.0250.020.0150.010.0050 El e v a t i o n ( f e e t ) 61 60 59 58 Exfiltration Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Wetted Storage Stage-Area-Storage Storage (cubic-feet) 300250200150100500 Surface/Horizontal/Wetted Area (sq-ft) 300250200150100500 El e v a t i o n ( f e e t ) 61 60 59 58 Prismatoid + Prismatoid Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 18HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0 58.00 0.00 0.50 0.00 0 58.00 0.00 1.00 0.00 0 58.00 0.00 1.50 0.00 0 58.00 0.00 2.00 0.00 0 58.00 0.00 2.50 0.00 0 58.00 0.00 3.00 0.00 0 58.00 0.00 3.50 0.00 0 58.00 0.00 4.00 0.00 0 58.00 0.00 4.50 0.00 0 58.00 0.00 5.00 0.00 0 58.00 0.00 5.50 0.00 0 58.00 0.00 6.00 0.00 0 58.00 0.00 6.50 0.00 0 58.00 0.00 7.00 0.00 0 58.00 0.00 7.50 0.00 0 58.00 0.00 8.00 0.00 0 58.00 0.00 8.50 0.00 0 58.00 0.00 9.00 0.00 0 58.00 0.00 9.50 0.00 0 58.00 0.00 10.00 0.00 0 58.00 0.00 10.50 0.01 0 58.00 0.01 11.00 0.01 0 58.00 0.01 11.50 0.01 0 58.00 0.01 12.00 0.06 7 58.06 0.03 12.50 0.02 37 58.33 0.03 13.00 0.01 0 58.00 0.01 13.50 0.01 0 58.00 0.01 14.00 0.01 0 58.00 0.01 14.50 0.00 0 58.00 0.00 15.00 0.00 0 58.00 0.00 15.50 0.00 0 58.00 0.00 16.00 0.00 0 58.00 0.00 16.50 0.00 0 58.00 0.00 17.00 0.00 0 58.00 0.00 17.50 0.00 0 58.00 0.00 18.00 0.00 0 58.00 0.00 18.50 0.00 0 58.00 0.00 19.00 0.00 0 58.00 0.00 19.50 0.00 0 58.00 0.00 20.00 0.00 0 58.00 0.00 20.50 0.00 0 58.00 0.00 21.00 0.00 0 58.00 0.00 21.50 0.00 0 58.00 0.00 22.00 0.00 0 58.00 0.00 22.50 0.00 0 58.00 0.00 23.00 0.00 0 58.00 0.00 23.50 0.00 0 58.00 0.00 24.00 0.00 0 58.00 0.00 24.50 0.00 0 58.00 0.00 25.00 0.00 0 58.00 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 19HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Discarded (cfs) 58.00 0.00 58.02 0.03 58.04 0.03 58.06 0.03 58.08 0.03 58.10 0.03 58.12 0.03 58.14 0.03 58.16 0.03 58.18 0.03 58.20 0.03 58.22 0.03 58.24 0.03 58.26 0.03 58.28 0.03 58.30 0.03 58.32 0.03 58.34 0.04 58.36 0.04 58.38 0.04 58.40 0.04 58.42 0.04 58.44 0.04 58.46 0.04 58.48 0.04 58.50 0.04 58.52 0.04 58.54 0.04 58.56 0.04 58.58 0.04 58.60 0.04 58.62 0.04 58.64 0.04 58.66 0.04 58.68 0.04 58.70 0.04 58.72 0.04 58.74 0.04 58.76 0.04 58.78 0.04 58.80 0.04 58.82 0.04 58.84 0.04 58.86 0.04 58.88 0.04 58.90 0.04 58.92 0.04 58.94 0.04 58.96 0.04 58.98 0.04 59.00 0.04 59.02 0.04 Elevation (feet) Discarded (cfs) 59.04 0.04 59.06 0.04 59.08 0.04 59.10 0.04 59.12 0.04 59.14 0.04 59.16 0.04 59.18 0.04 59.20 0.04 59.22 0.04 59.24 0.04 59.26 0.05 59.28 0.05 59.30 0.05 59.32 0.05 59.34 0.05 59.36 0.05 59.38 0.05 59.40 0.05 59.42 0.05 59.44 0.05 59.46 0.05 59.48 0.05 59.50 0.05 59.52 0.05 59.54 0.05 59.56 0.05 59.58 0.05 59.60 0.05 59.62 0.05 59.64 0.05 59.66 0.05 59.68 0.05 59.70 0.05 59.72 0.05 59.74 0.05 59.76 0.05 59.78 0.05 59.80 0.05 59.82 0.05 59.84 0.05 59.86 0.05 59.88 0.05 59.90 0.05 59.92 0.05 59.94 0.05 59.96 0.05 59.98 0.05 60.00 0.05 60.02 0.05 60.04 0.05 60.06 0.05 Elevation (feet) Discarded (cfs) 60.08 0.05 60.10 0.05 60.12 0.05 60.14 0.05 60.16 0.05 60.18 0.05 60.20 0.06 60.22 0.06 60.24 0.06 60.26 0.06 60.28 0.06 60.30 0.06 60.32 0.06 60.34 0.06 60.36 0.06 60.38 0.06 60.40 0.06 60.42 0.06 60.44 0.06 60.46 0.06 60.48 0.06 60.50 0.06 60.52 0.06 60.54 0.06 60.56 0.06 60.58 0.06 60.60 0.06 60.62 0.06 60.64 0.06 60.66 0.06 60.68 0.06 60.70 0.06 60.72 0.06 60.74 0.06 60.76 0.06 60.78 0.06 60.80 0.06 60.82 0.06 60.84 0.06 60.86 0.06 60.88 0.06 60.90 0.06 60.92 0.06 60.94 0.06 60.96 0.06 60.98 0.06 61.00 0.06 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 20HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 58.00 164 0 58.05 167 6 58.10 170 11 58.15 173 17 58.20 175 22 58.25 178 28 58.30 181 33 58.35 184 39 58.40 187 44 58.45 190 50 58.50 192 56 58.55 195 61 58.60 198 67 58.65 201 72 58.70 204 78 58.75 206 83 58.80 209 89 58.85 212 94 58.90 215 100 58.95 218 105 59.00 220 111 59.05 223 117 59.10 226 122 59.15 229 128 59.20 232 133 59.25 235 139 59.30 237 144 59.35 240 150 59.40 243 155 59.45 246 161 59.50 249 167 59.55 251 172 59.60 254 178 59.65 257 183 59.70 260 189 59.75 263 194 59.80 266 200 59.85 268 205 59.90 271 211 59.95 274 217 60.00 277 222 60.05 280 228 60.10 282 233 60.15 285 239 60.20 288 244 60.25 291 250 60.30 294 255 60.35 296 261 60.40 299 267 60.45 302 272 60.50 305 278 60.55 308 283 Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 60.60 311 289 60.65 313 294 60.70 316 300 60.75 319 305 60.80 322 311 60.85 325 316 60.90 327 322 60.95 330 328 61.00 333 333 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 21HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Inflow Area = 0.422 ac, 0.00% Impervious, Inflow Depth = 0.03" for 2-Year event Inflow = 0.00 cfs @ 16.70 hrs, Volume= 0.001 af Outflow = 0.00 cfs @ 16.71 hrs, Volume= 0.001 af, Atten= 0%, Lag= 0.5 min Discarded = 0.00 cfs @ 16.71 hrs, Volume= 0.001 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 45.50' @ 16.71 hrs Surf.Area= 313 sf Storage= 0 cf Plug-Flow detention time= 0.6 min calculated for 0.001 af (100% of inflow) Center-of-Mass det. time= 0.6 min ( 1,140.5 - 1,139.9 ) Volume Invert Avail.Storage Storage Description #1 45.50' 240 cf 8.25'W x 37.90'L x 3.00'H Prismatoid 938 cf Overall - 405 cf Embedded = 533 cf x 45.0% Voids #2 45.50' 405 cf 4.25'W x 7.95'L x 3.00'H Prismatoid x 4 Inside #1 645 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 45.50'8.270 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.00 cfs @ 16.71 hrs HW=45.50' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.00 cfs) Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Inflow Discarded Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0 0 Inflow Area=0.422 ac Peak Elev=45.50' Storage=0 cf 0.00 cfs 0.00 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 22HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Discarded Stage-Discharge Discharge (cfs) 0.110.10.090.080.070.060.050.040.030.020.010 El e v a t i o n ( f e e t ) 48 47 46 Exfiltration Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Wetted Storage Stage-Area-Storage Storage (cubic-feet) 600550500450400350300250200150100500 Surface/Horizontal/Wetted Area (sq-ft) 550500450400350300250200150100500 El e v a t i o n ( f e e t ) 48 47 46 Prismatoid + Prismatoid Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 23HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0 45.50 0.00 0.50 0.00 0 45.50 0.00 1.00 0.00 0 45.50 0.00 1.50 0.00 0 45.50 0.00 2.00 0.00 0 45.50 0.00 2.50 0.00 0 45.50 0.00 3.00 0.00 0 45.50 0.00 3.50 0.00 0 45.50 0.00 4.00 0.00 0 45.50 0.00 4.50 0.00 0 45.50 0.00 5.00 0.00 0 45.50 0.00 5.50 0.00 0 45.50 0.00 6.00 0.00 0 45.50 0.00 6.50 0.00 0 45.50 0.00 7.00 0.00 0 45.50 0.00 7.50 0.00 0 45.50 0.00 8.00 0.00 0 45.50 0.00 8.50 0.00 0 45.50 0.00 9.00 0.00 0 45.50 0.00 9.50 0.00 0 45.50 0.00 10.00 0.00 0 45.50 0.00 10.50 0.00 0 45.50 0.00 11.00 0.00 0 45.50 0.00 11.50 0.00 0 45.50 0.00 12.00 0.00 0 45.50 0.00 12.50 0.00 0 45.50 0.00 13.00 0.00 0 45.50 0.00 13.50 0.00 0 45.50 0.00 14.00 0.00 0 45.50 0.00 14.50 0.00 0 45.50 0.00 15.00 0.00 0 45.50 0.00 15.50 0.00 0 45.50 0.00 16.00 0.00 0 45.50 0.00 16.50 0.00 0 45.50 0.00 17.00 0.00 0 45.50 0.00 17.50 0.00 0 45.50 0.00 18.00 0.00 0 45.50 0.00 18.50 0.00 0 45.50 0.00 19.00 0.00 0 45.50 0.00 19.50 0.00 0 45.50 0.00 20.00 0.00 0 45.50 0.00 20.50 0.00 0 45.50 0.00 21.00 0.00 0 45.50 0.00 21.50 0.00 0 45.50 0.00 22.00 0.00 0 45.50 0.00 22.50 0.00 0 45.50 0.00 23.00 0.00 0 45.50 0.00 23.50 0.00 0 45.50 0.00 24.00 0.00 0 45.50 0.00 24.50 0.00 0 45.50 0.00 25.00 0.00 0 45.50 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 24HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Discarded (cfs) 45.50 0.00 45.52 0.06 45.54 0.06 45.56 0.06 45.58 0.06 45.60 0.06 45.62 0.06 45.64 0.06 45.66 0.06 45.68 0.06 45.70 0.06 45.72 0.06 45.74 0.06 45.76 0.06 45.78 0.06 45.80 0.07 45.82 0.07 45.84 0.07 45.86 0.07 45.88 0.07 45.90 0.07 45.92 0.07 45.94 0.07 45.96 0.07 45.98 0.07 46.00 0.07 46.02 0.07 46.04 0.07 46.06 0.07 46.08 0.07 46.10 0.07 46.12 0.07 46.14 0.07 46.16 0.07 46.18 0.07 46.20 0.07 46.22 0.07 46.24 0.07 46.26 0.07 46.28 0.07 46.30 0.07 46.32 0.07 46.34 0.07 46.36 0.08 46.38 0.08 46.40 0.08 46.42 0.08 46.44 0.08 46.46 0.08 46.48 0.08 46.50 0.08 46.52 0.08 Elevation (feet) Discarded (cfs) 46.54 0.08 46.56 0.08 46.58 0.08 46.60 0.08 46.62 0.08 46.64 0.08 46.66 0.08 46.68 0.08 46.70 0.08 46.72 0.08 46.74 0.08 46.76 0.08 46.78 0.08 46.80 0.08 46.82 0.08 46.84 0.08 46.86 0.08 46.88 0.08 46.90 0.08 46.92 0.08 46.94 0.09 46.96 0.09 46.98 0.09 47.00 0.09 47.02 0.09 47.04 0.09 47.06 0.09 47.08 0.09 47.10 0.09 47.12 0.09 47.14 0.09 47.16 0.09 47.18 0.09 47.20 0.09 47.22 0.09 47.24 0.09 47.26 0.09 47.28 0.09 47.30 0.09 47.32 0.09 47.34 0.09 47.36 0.09 47.38 0.09 47.40 0.09 47.42 0.09 47.44 0.09 47.46 0.09 47.48 0.09 47.50 0.10 47.52 0.10 47.54 0.10 47.56 0.10 Elevation (feet) Discarded (cfs) 47.58 0.10 47.60 0.10 47.62 0.10 47.64 0.10 47.66 0.10 47.68 0.10 47.70 0.10 47.72 0.10 47.74 0.10 47.76 0.10 47.78 0.10 47.80 0.10 47.82 0.10 47.84 0.10 47.86 0.10 47.88 0.10 47.90 0.10 47.92 0.10 47.94 0.10 47.96 0.10 47.98 0.10 48.00 0.10 48.02 0.10 48.04 0.10 48.06 0.11 48.08 0.11 48.10 0.11 48.12 0.11 48.14 0.11 48.16 0.11 48.18 0.11 48.20 0.11 48.22 0.11 48.24 0.11 48.26 0.11 48.28 0.11 48.30 0.11 48.32 0.11 48.34 0.11 48.36 0.11 48.38 0.11 48.40 0.11 48.42 0.11 48.44 0.11 48.46 0.11 48.48 0.11 48.50 0.11 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 25HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 45.50 313 0 45.55 317 11 45.60 322 22 45.65 327 32 45.70 331 43 45.75 336 54 45.80 340 65 45.85 345 75 45.90 350 86 45.95 354 97 46.00 359 108 46.05 363 118 46.10 368 129 46.15 373 140 46.20 377 151 46.25 382 161 46.30 387 172 46.35 391 183 46.40 396 194 46.45 400 204 46.50 405 215 46.55 410 226 46.60 414 237 46.65 419 247 46.70 423 258 46.75 428 269 46.80 433 280 46.85 437 290 46.90 442 301 46.95 447 312 47.00 451 323 47.05 456 333 47.10 460 344 47.15 465 355 47.20 470 366 47.25 474 376 47.30 479 387 47.35 483 398 47.40 488 409 47.45 493 419 47.50 497 430 47.55 502 441 47.60 507 452 47.65 511 462 47.70 516 473 47.75 520 484 47.80 525 495 47.85 530 505 47.90 534 516 47.95 539 527 48.00 543 538 48.05 548 548 Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 48.10 553 559 48.15 557 570 48.20 562 581 48.25 567 591 48.30 571 602 48.35 576 613 48.40 580 624 48.45 585 634 48.50 590 645 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 26HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond CB1: Roof Leader - 6" ADS Pipe Inflow Area = 0.027 ac,100.00% Impervious, Inflow Depth = 3.37" for 2-Year event Inflow = 0.10 cfs @ 12.08 hrs, Volume= 0.008 af Outflow = 0.10 cfs @ 12.08 hrs, Volume= 0.008 af, Atten= 0%, Lag= 0.0 min Primary = 0.10 cfs @ 12.08 hrs, Volume= 0.008 af Routed to Pond 1P : One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 63.14' @ 12.08 hrs Device Routing Invert Outlet Devices #1 Primary 63.00'6.0" Round Culvert X 2.00 L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 63.00' / 61.00' S= 0.0667 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.20 sf Primary OutFlow Max=0.10 cfs @ 12.08 hrs HW=63.14' TW=58.19' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.10 cfs @ 1.02 fps) Pond CB1: Roof Leader - 6" ADS Pipe Inflow Primary Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=0.027 ac Peak Elev=63.14' 6.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0667 '/' 0.10 cfs 0.10 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 27HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond CB1: Roof Leader - 6" ADS Pipe Primary Stage-Discharge Discharge (cfs) 0.70.650.60.550.50.450.40.350.30.250.20.150.10.050 El e v a t i o n ( f e e t ) 63.5 63.48 63.46 63.44 63.42 63.4 63.38 63.36 63.34 63.32 63.3 63.28 63.26 63.24 63.22 63.2 63.18 63.16 63.14 63.12 63.1 63.08 63.06 63.04 63.02 63 Culvert Pond CB1: Roof Leader - 6" ADS Pipe Storage Stage-Area-Storage Storage (acre-feet) 0 El e v a t i o n ( f e e t ) 63.5 63.48 63.46 63.44 63.42 63.4 63.38 63.36 63.34 63.32 63.3 63.28 63.26 63.24 63.22 63.2 63.18 63.16 63.14 63.12 63.1 63.08 63.06 63.04 63.02 63 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 28HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond CB1: Roof Leader - 6" ADS Pipe Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 63.00 0.00 0.50 0.00 63.00 0.00 1.00 0.00 63.00 0.00 1.50 0.00 63.00 0.00 2.00 0.00 63.01 0.00 2.50 0.00 63.01 0.00 3.00 0.00 63.01 0.00 3.50 0.00 63.01 0.00 4.00 0.00 63.01 0.00 4.50 0.00 63.01 0.00 5.00 0.00 63.01 0.00 5.50 0.00 63.01 0.00 6.00 0.00 63.02 0.00 6.50 0.00 63.02 0.00 7.00 0.00 63.02 0.00 7.50 0.00 63.02 0.00 8.00 0.00 63.02 0.00 8.50 0.00 63.02 0.00 9.00 0.00 63.03 0.00 9.50 0.00 63.03 0.00 10.00 0.00 63.03 0.00 10.50 0.01 63.03 0.01 11.00 0.01 63.04 0.01 11.50 0.01 63.05 0.01 12.00 0.06 63.11 0.06 12.50 0.02 63.06 0.02 13.00 0.01 63.04 0.01 13.50 0.01 63.04 0.01 14.00 0.01 63.03 0.01 14.50 0.00 63.03 0.00 15.00 0.00 63.03 0.00 15.50 0.00 63.03 0.00 16.00 0.00 63.02 0.00 16.50 0.00 63.02 0.00 17.00 0.00 63.02 0.00 17.50 0.00 63.02 0.00 18.00 0.00 63.02 0.00 18.50 0.00 63.02 0.00 19.00 0.00 63.02 0.00 19.50 0.00 63.02 0.00 20.00 0.00 63.02 0.00 20.50 0.00 63.02 0.00 21.00 0.00 63.02 0.00 21.50 0.00 63.01 0.00 22.00 0.00 63.01 0.00 22.50 0.00 63.01 0.00 23.00 0.00 63.01 0.00 23.50 0.00 63.01 0.00 24.00 0.00 63.01 0.00 24.50 0.00 63.00 0.00 25.00 0.00 63.00 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 29HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond CB1: Roof Leader - 6" ADS Pipe Elevation (feet) Primary (cfs) 63.00 0.00 63.01 0.00 63.02 0.00 63.03 0.00 63.04 0.01 63.05 0.01 63.06 0.02 63.07 0.02 63.08 0.03 63.09 0.04 63.10 0.05 63.11 0.06 63.12 0.07 63.13 0.08 63.14 0.09 63.15 0.10 63.16 0.12 63.17 0.13 63.18 0.15 63.19 0.16 63.20 0.18 63.21 0.19 63.22 0.21 63.23 0.23 63.24 0.25 63.25 0.26 63.26 0.28 63.27 0.30 63.28 0.32 63.29 0.34 63.30 0.36 63.31 0.38 63.32 0.40 63.33 0.42 63.34 0.45 63.35 0.47 63.36 0.49 63.37 0.51 63.38 0.53 63.39 0.55 63.40 0.57 63.41 0.59 63.42 0.61 63.43 0.63 63.44 0.65 63.45 0.67 63.46 0.69 63.47 0.71 63.48 0.72 63.49 0.74 63.50 0.75 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 30HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond CB1: Roof Leader - 6" ADS Pipe Elevation (feet) Storage (acre-feet) 63.00 0.000 63.01 0.000 63.02 0.000 63.03 0.000 63.04 0.000 63.05 0.000 63.06 0.000 63.07 0.000 63.08 0.000 63.09 0.000 63.10 0.000 63.11 0.000 63.12 0.000 63.13 0.000 63.14 0.000 63.15 0.000 63.16 0.000 63.17 0.000 63.18 0.000 63.19 0.000 63.20 0.000 63.21 0.000 63.22 0.000 63.23 0.000 63.24 0.000 63.25 0.000 63.26 0.000 63.27 0.000 63.28 0.000 63.29 0.000 63.30 0.000 63.31 0.000 63.32 0.000 63.33 0.000 63.34 0.000 63.35 0.000 63.36 0.000 63.37 0.000 63.38 0.000 63.39 0.000 63.40 0.000 63.41 0.000 63.42 0.000 63.43 0.000 63.44 0.000 63.45 0.000 63.46 0.000 63.47 0.000 63.48 0.000 63.49 0.000 63.50 0.000 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 31HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond CB2: Catch Basin At Lower Driveway Inflow Area = 0.422 ac, 0.00% Impervious, Inflow Depth = 0.03" for 2-Year event Inflow = 0.00 cfs @ 16.70 hrs, Volume= 0.001 af Outflow = 0.00 cfs @ 16.70 hrs, Volume= 0.001 af, Atten= 0%, Lag= 0.0 min Primary = 0.00 cfs @ 16.70 hrs, Volume= 0.001 af Routed to Pond 2P : One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 49.03' @ 16.70 hrs Device Routing Invert Outlet Devices #1 Primary 49.00'12.0" Round Catch Basin L= 50.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 49.00' / 48.50' S= 0.0100 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.00 cfs @ 16.70 hrs HW=49.03' TW=45.50' (Dynamic Tailwater) 1=Catch Basin (Barrel Controls 0.00 cfs @ 0.43 fps) Pond CB2: Catch Basin At Lower Driveway Inflow Primary Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0 0 Inflow Area=0.422 ac Peak Elev=49.03' 12.0" Round Culvert n=0.020 L=50.0' S=0.0100 '/' 0.00 cfs 0.00 cfs Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 32HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond CB2: Catch Basin At Lower Driveway Primary Stage-Discharge Discharge (cfs) 210 El e v a t i o n ( f e e t ) 50 49 Catch Basin Pond CB2: Catch Basin At Lower Driveway Storage Stage-Area-Storage Storage (acre-feet) 0 El e v a t i o n ( f e e t ) 50 49 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 33HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond CB2: Catch Basin At Lower Driveway Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 49.00 0.00 0.50 0.00 49.00 0.00 1.00 0.00 49.00 0.00 1.50 0.00 49.00 0.00 2.00 0.00 49.00 0.00 2.50 0.00 49.00 0.00 3.00 0.00 49.00 0.00 3.50 0.00 49.00 0.00 4.00 0.00 49.00 0.00 4.50 0.00 49.00 0.00 5.00 0.00 49.00 0.00 5.50 0.00 49.00 0.00 6.00 0.00 49.00 0.00 6.50 0.00 49.00 0.00 7.00 0.00 49.00 0.00 7.50 0.00 49.00 0.00 8.00 0.00 49.00 0.00 8.50 0.00 49.00 0.00 9.00 0.00 49.00 0.00 9.50 0.00 49.00 0.00 10.00 0.00 49.00 0.00 10.50 0.00 49.00 0.00 11.00 0.00 49.00 0.00 11.50 0.00 49.00 0.00 12.00 0.00 49.00 0.00 12.50 0.00 49.00 0.00 13.00 0.00 49.00 0.00 13.50 0.00 49.00 0.00 14.00 0.00 49.01 0.00 14.50 0.00 49.02 0.00 15.00 0.00 49.03 0.00 15.50 0.00 49.03 0.00 16.00 0.00 49.03 0.00 16.50 0.00 49.03 0.00 17.00 0.00 49.03 0.00 17.50 0.00 49.03 0.00 18.00 0.00 49.03 0.00 18.50 0.00 49.03 0.00 19.00 0.00 49.03 0.00 19.50 0.00 49.03 0.00 20.00 0.00 49.03 0.00 20.50 0.00 49.03 0.00 21.00 0.00 49.03 0.00 21.50 0.00 49.03 0.00 22.00 0.00 49.03 0.00 22.50 0.00 49.03 0.00 23.00 0.00 49.02 0.00 23.50 0.00 49.02 0.00 24.00 0.00 49.02 0.00 24.50 0.00 49.00 0.00 25.00 0.00 49.00 0.00 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 34HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond CB2: Catch Basin At Lower Driveway Elevation (feet) Primary (cfs) 49.00 0.00 49.01 0.00 49.02 0.00 49.03 0.00 49.04 0.00 49.05 0.01 49.06 0.01 49.07 0.01 49.08 0.02 49.09 0.02 49.10 0.03 49.11 0.03 49.12 0.04 49.13 0.05 49.14 0.05 49.15 0.06 49.16 0.07 49.17 0.08 49.18 0.09 49.19 0.10 49.20 0.11 49.21 0.12 49.22 0.13 49.23 0.15 49.24 0.16 49.25 0.17 49.26 0.19 49.27 0.20 49.28 0.22 49.29 0.23 49.30 0.25 49.31 0.27 49.32 0.28 49.33 0.30 49.34 0.32 49.35 0.34 49.36 0.35 49.37 0.37 49.38 0.39 49.39 0.41 49.40 0.43 49.41 0.45 49.42 0.48 49.43 0.50 49.44 0.52 49.45 0.54 49.46 0.56 49.47 0.59 49.48 0.61 49.49 0.63 49.50 0.66 49.51 0.68 Elevation (feet) Primary (cfs) 49.52 0.70 49.53 0.73 49.54 0.75 49.55 0.78 49.56 0.80 49.57 0.83 49.58 0.85 49.59 0.88 49.60 0.91 49.61 0.93 49.62 0.96 49.63 0.99 49.64 1.01 49.65 1.04 49.66 1.07 49.67 1.09 49.68 1.12 49.69 1.15 49.70 1.18 49.71 1.21 49.72 1.23 49.73 1.26 49.74 1.29 49.75 1.32 49.76 1.35 49.77 1.37 49.78 1.40 49.79 1.43 49.80 1.46 49.81 1.49 49.82 1.51 49.83 1.54 49.84 1.57 49.85 1.60 49.86 1.63 49.87 1.66 49.88 1.68 49.89 1.71 49.90 1.74 49.91 1.77 49.92 1.79 49.93 1.82 49.94 1.85 49.95 1.87 49.96 1.90 49.97 1.93 49.98 1.95 49.99 1.98 50.00 2.01 Type III 24-hr 2-Year Rainfall=3.60"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 35HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond CB2: Catch Basin At Lower Driveway Elevation (feet) Storage (acre-feet) 49.00 0.000 49.01 0.000 49.02 0.000 49.03 0.000 49.04 0.000 49.05 0.000 49.06 0.000 49.07 0.000 49.08 0.000 49.09 0.000 49.10 0.000 49.11 0.000 49.12 0.000 49.13 0.000 49.14 0.000 49.15 0.000 49.16 0.000 49.17 0.000 49.18 0.000 49.19 0.000 49.20 0.000 49.21 0.000 49.22 0.000 49.23 0.000 49.24 0.000 49.25 0.000 49.26 0.000 49.27 0.000 49.28 0.000 49.29 0.000 49.30 0.000 49.31 0.000 49.32 0.000 49.33 0.000 49.34 0.000 49.35 0.000 49.36 0.000 49.37 0.000 49.38 0.000 49.39 0.000 49.40 0.000 49.41 0.000 49.42 0.000 49.43 0.000 49.44 0.000 49.45 0.000 49.46 0.000 49.47 0.000 49.48 0.000 49.49 0.000 49.50 0.000 49.51 0.000 Elevation (feet) Storage (acre-feet) 49.52 0.000 49.53 0.000 49.54 0.000 49.55 0.000 49.56 0.000 49.57 0.000 49.58 0.000 49.59 0.000 49.60 0.000 49.61 0.000 49.62 0.000 49.63 0.000 49.64 0.000 49.65 0.000 49.66 0.000 49.67 0.000 49.68 0.000 49.69 0.000 49.70 0.000 49.71 0.000 49.72 0.000 49.73 0.000 49.74 0.000 49.75 0.000 49.76 0.000 49.77 0.000 49.78 0.000 49.79 0.000 49.80 0.000 49.81 0.000 49.82 0.000 49.83 0.000 49.84 0.000 49.85 0.000 49.86 0.000 49.87 0.000 49.88 0.000 49.89 0.000 49.90 0.000 49.91 0.000 49.92 0.000 49.93 0.000 49.94 0.000 49.95 0.000 49.96 0.000 49.97 0.000 49.98 0.000 49.99 0.000 50.00 0.000 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 36HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1Ex: Existing Parcel Area Runoff = 0.00 cfs @ 22.06 hrs, Volume= 0.002 af, Depth= 0.02" Routed to Reach 1Dis : Pre- Dev Peak Discharge Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=5.30" Area (sf) CN Description 61,160 30 Woods, Good, HSG A 61,160 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 1Ex: Existing Parcel Area Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Type III 24-hr 10-Year Rainfall=5.30" Runoff Area=61,160 sf Runoff Volume=0.002 af Runoff Depth=0.02" Tc=6.0 min CN=30 0.00 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 37HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1Ex: Existing Parcel Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.05 0.00 0.00 1.50 0.08 0.00 0.00 2.00 0.11 0.00 0.00 2.50 0.13 0.00 0.00 3.00 0.16 0.00 0.00 3.50 0.19 0.00 0.00 4.00 0.23 0.00 0.00 4.50 0.26 0.00 0.00 5.00 0.30 0.00 0.00 5.50 0.34 0.00 0.00 6.00 0.38 0.00 0.00 6.50 0.43 0.00 0.00 7.00 0.48 0.00 0.00 7.50 0.54 0.00 0.00 8.00 0.60 0.00 0.00 8.50 0.68 0.00 0.00 9.00 0.77 0.00 0.00 9.50 0.88 0.00 0.00 10.00 1.00 0.00 0.00 10.50 1.15 0.00 0.00 11.00 1.33 0.00 0.00 11.50 1.58 0.00 0.00 12.00 2.65 0.00 0.00 12.50 3.72 0.00 0.00 13.00 3.97 0.00 0.00 13.50 4.15 0.00 0.00 14.00 4.30 0.00 0.00 14.50 4.42 0.00 0.00 15.00 4.53 0.00 0.00 15.50 4.62 0.00 0.00 16.00 4.70 0.00 0.00 16.50 4.76 0.00 0.00 17.00 4.82 0.00 0.00 17.50 4.87 0.00 0.00 18.00 4.92 0.00 0.00 18.50 4.96 0.00 0.00 19.00 5.00 0.00 0.00 19.50 5.04 0.01 0.00 20.00 5.07 0.01 0.00 20.50 5.11 0.01 0.00 21.00 5.14 0.01 0.00 21.50 5.17 0.01 0.00 22.00 5.20 0.01 0.00 22.50 5.23 0.01 0.00 23.00 5.25 0.01 0.00 23.50 5.28 0.02 0.00 24.00 5.30 0.02 0.00 24.50 5.30 0.02 0.00 25.00 5.30 0.02 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 38HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Roof Runoff Runoff = 0.14 cfs @ 12.08 hrs, Volume= 0.011 af, Depth= 5.06" Routed to Pond CB1 : Roof Leader - 6" ADS Pipe Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=5.30" Area (sf) CN Description * 1,184 98 Roof Area 1,184 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 1S: Roof Runoff Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type III 24-hr 10-Year Rainfall=5.30" Runoff Area=1,184 sf Runoff Volume=0.011 af Runoff Depth=5.06" Tc=6.0 min CN=98 0.14 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 39HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Roof Runoff Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.05 0.00 0.00 1.50 0.08 0.01 0.00 2.00 0.11 0.02 0.00 2.50 0.13 0.03 0.00 3.00 0.16 0.05 0.00 3.50 0.19 0.07 0.00 4.00 0.23 0.09 0.00 4.50 0.26 0.12 0.00 5.00 0.30 0.15 0.00 5.50 0.34 0.18 0.00 6.00 0.38 0.21 0.00 6.50 0.43 0.25 0.00 7.00 0.48 0.30 0.00 7.50 0.54 0.35 0.00 8.00 0.60 0.41 0.00 8.50 0.68 0.49 0.00 9.00 0.77 0.57 0.01 9.50 0.88 0.67 0.01 10.00 1.00 0.79 0.01 10.50 1.15 0.93 0.01 11.00 1.33 1.11 0.01 11.50 1.58 1.36 0.02 12.00 2.65 2.42 0.09 12.50 3.72 3.49 0.03 13.00 3.97 3.74 0.01 13.50 4.15 3.92 0.01 14.00 4.30 4.06 0.01 14.50 4.42 4.18 0.01 15.00 4.53 4.29 0.01 15.50 4.62 4.38 0.00 16.00 4.70 4.46 0.00 16.50 4.76 4.52 0.00 17.00 4.82 4.58 0.00 17.50 4.87 4.64 0.00 18.00 4.92 4.68 0.00 18.50 4.96 4.72 0.00 19.00 5.00 4.76 0.00 19.50 5.04 4.80 0.00 20.00 5.07 4.84 0.00 20.50 5.11 4.87 0.00 21.00 5.14 4.90 0.00 21.50 5.17 4.93 0.00 22.00 5.20 4.96 0.00 22.50 5.23 4.99 0.00 23.00 5.25 5.01 0.00 23.50 5.28 5.04 0.00 24.00 5.30 5.06 0.00 24.50 5.30 5.06 0.00 25.00 5.30 5.06 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 40HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Gravel Driveway & Landscape Aras Runoff = 0.05 cfs @ 12.37 hrs, Volume= 0.012 af, Depth= 0.35" Routed to Pond CB2 : Catch Basin At Lower Driveway Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=5.30" Area (sf) CN Description 10,000 30 Woods, Good, HSG A 3,400 76 Gravel roads, HSG A 5,000 39 >75% Grass cover, Good, HSG A 18,400 41 Weighted Average 18,400 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 2S: Gravel Driveway & Landscape Aras Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type III 24-hr 10-Year Rainfall=5.30" Runoff Area=18,400 sf Runoff Volume=0.012 af Runoff Depth=0.35" Tc=6.0 min CN=41 0.05 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 41HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Gravel Driveway & Landscape Aras Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.05 0.00 0.00 1.50 0.08 0.00 0.00 2.00 0.11 0.00 0.00 2.50 0.13 0.00 0.00 3.00 0.16 0.00 0.00 3.50 0.19 0.00 0.00 4.00 0.23 0.00 0.00 4.50 0.26 0.00 0.00 5.00 0.30 0.00 0.00 5.50 0.34 0.00 0.00 6.00 0.38 0.00 0.00 6.50 0.43 0.00 0.00 7.00 0.48 0.00 0.00 7.50 0.54 0.00 0.00 8.00 0.60 0.00 0.00 8.50 0.68 0.00 0.00 9.00 0.77 0.00 0.00 9.50 0.88 0.00 0.00 10.00 1.00 0.00 0.00 10.50 1.15 0.00 0.00 11.00 1.33 0.00 0.00 11.50 1.58 0.00 0.00 12.00 2.65 0.00 0.00 12.50 3.72 0.05 0.04 13.00 3.97 0.08 0.02 13.50 4.15 0.10 0.02 14.00 4.30 0.13 0.02 14.50 4.42 0.15 0.02 15.00 4.53 0.17 0.02 15.50 4.62 0.19 0.02 16.00 4.70 0.20 0.01 16.50 4.76 0.22 0.01 17.00 4.82 0.23 0.01 17.50 4.87 0.24 0.01 18.00 4.92 0.25 0.01 18.50 4.96 0.26 0.01 19.00 5.00 0.27 0.01 19.50 5.04 0.28 0.01 20.00 5.07 0.29 0.01 20.50 5.11 0.30 0.01 21.00 5.14 0.31 0.01 21.50 5.17 0.31 0.01 22.00 5.20 0.32 0.01 22.50 5.23 0.33 0.01 23.00 5.25 0.34 0.01 23.50 5.28 0.34 0.01 24.00 5.30 0.35 0.01 24.50 5.30 0.35 0.00 25.00 5.30 0.35 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 42HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Undeveloped Areas of Parcel Runoff = 0.00 cfs @ 22.06 hrs, Volume= 0.001 af, Depth= 0.02" Routed to Reach 4R : POST DEVELOPMENT PEAK DISCHARGE Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=5.30" Area (sf) CN Description 41,760 30 Woods, Good, HSG A 41,760 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 3S: Undeveloped Areas of Parcel Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Type III 24-hr 10-Year Rainfall=5.30" Runoff Area=41,760 sf Runoff Volume=0.001 af Runoff Depth=0.02" Tc=6.0 min CN=30 0.00 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 43HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: Undeveloped Areas of Parcel Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.05 0.00 0.00 1.50 0.08 0.00 0.00 2.00 0.11 0.00 0.00 2.50 0.13 0.00 0.00 3.00 0.16 0.00 0.00 3.50 0.19 0.00 0.00 4.00 0.23 0.00 0.00 4.50 0.26 0.00 0.00 5.00 0.30 0.00 0.00 5.50 0.34 0.00 0.00 6.00 0.38 0.00 0.00 6.50 0.43 0.00 0.00 7.00 0.48 0.00 0.00 7.50 0.54 0.00 0.00 8.00 0.60 0.00 0.00 8.50 0.68 0.00 0.00 9.00 0.77 0.00 0.00 9.50 0.88 0.00 0.00 10.00 1.00 0.00 0.00 10.50 1.15 0.00 0.00 11.00 1.33 0.00 0.00 11.50 1.58 0.00 0.00 12.00 2.65 0.00 0.00 12.50 3.72 0.00 0.00 13.00 3.97 0.00 0.00 13.50 4.15 0.00 0.00 14.00 4.30 0.00 0.00 14.50 4.42 0.00 0.00 15.00 4.53 0.00 0.00 15.50 4.62 0.00 0.00 16.00 4.70 0.00 0.00 16.50 4.76 0.00 0.00 17.00 4.82 0.00 0.00 17.50 4.87 0.00 0.00 18.00 4.92 0.00 0.00 18.50 4.96 0.00 0.00 19.00 5.00 0.00 0.00 19.50 5.04 0.01 0.00 20.00 5.07 0.01 0.00 20.50 5.11 0.01 0.00 21.00 5.14 0.01 0.00 21.50 5.17 0.01 0.00 22.00 5.20 0.01 0.00 22.50 5.23 0.01 0.00 23.00 5.25 0.01 0.00 23.50 5.28 0.02 0.00 24.00 5.30 0.02 0.00 24.50 5.30 0.02 0.00 25.00 5.30 0.02 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 44HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1Dis: Pre- Dev Peak Discharge Inflow Area = 1.404 ac, 0.00% Impervious, Inflow Depth = 0.02" for 10-Year event Inflow = 0.00 cfs @ 22.06 hrs, Volume= 0.002 af Outflow = 0.00 cfs @ 22.06 hrs, Volume= 0.002 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Reach 1Dis: Pre- Dev Peak Discharge Inflow Outflow Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Inflow Area=1.404 ac 0.00 cfs 0.00 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 45HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 1Dis: Pre- Dev Peak Discharge Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.00 0.00 12.50 0.00 0.00 13.00 0.00 0.00 13.50 0.00 0.00 14.00 0.00 0.00 14.50 0.00 0.00 15.00 0.00 0.00 15.50 0.00 0.00 16.00 0.00 0.00 16.50 0.00 0.00 17.00 0.00 0.00 17.50 0.00 0.00 18.00 0.00 0.00 18.50 0.00 0.00 19.00 0.00 0.00 19.50 0.00 0.00 20.00 0.00 0.00 20.50 0.00 0.00 21.00 0.00 0.00 21.50 0.00 0.00 22.00 0.00 0.00 22.50 0.00 0.00 23.00 0.00 0.00 23.50 0.00 0.00 24.00 0.00 0.00 24.50 0.00 0.00 25.00 0.00 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 46HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Inflow Area = 0.959 ac, 0.00% Impervious, Inflow Depth = 0.02" for 10-Year event Inflow = 0.00 cfs @ 22.06 hrs, Volume= 0.001 af Outflow = 0.00 cfs @ 22.06 hrs, Volume= 0.001 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Inflow Outflow Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Inflow Area=0.959 ac 0.00 cfs 0.00 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 47HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.00 0.00 12.50 0.00 0.00 13.00 0.00 0.00 13.50 0.00 0.00 14.00 0.00 0.00 14.50 0.00 0.00 15.00 0.00 0.00 15.50 0.00 0.00 16.00 0.00 0.00 16.50 0.00 0.00 17.00 0.00 0.00 17.50 0.00 0.00 18.00 0.00 0.00 18.50 0.00 0.00 19.00 0.00 0.00 19.50 0.00 0.00 20.00 0.00 0.00 20.50 0.00 0.00 21.00 0.00 0.00 21.50 0.00 0.00 22.00 0.00 0.00 22.50 0.00 0.00 23.00 0.00 0.00 23.50 0.00 0.00 24.00 0.00 0.00 24.50 0.00 0.00 25.00 0.00 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 48HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Inflow Area = 0.027 ac,100.00% Impervious, Inflow Depth = 5.06" for 10-Year event Inflow = 0.14 cfs @ 12.08 hrs, Volume= 0.011 af Outflow = 0.04 cfs @ 12.41 hrs, Volume= 0.011 af, Atten= 71%, Lag= 19.7 min Discarded = 0.04 cfs @ 12.41 hrs, Volume= 0.011 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 58.82' @ 12.41 hrs Surf.Area= 164 sf Storage= 91 cf Plug-Flow detention time= 10.9 min calculated for 0.011 af (100% of inflow) Center-of-Mass det. time= 10.9 min ( 758.0 - 747.1 ) Volume Invert Avail.Storage Storage Description #1 58.00' 130 cf 8.25'W x 19.90'L x 3.00'H Prismatoid 493 cf Overall - 203 cf Embedded = 290 cf x 45.0% Voids #2 58.00' 203 cf 4.25'W x 15.90'L x 3.00'H Prismatoid Inside #1 333 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 58.00'8.270 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.04 cfs @ 12.41 hrs HW=58.82' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Inflow Discarded Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.027 ac Peak Elev=58.82' Storage=91 cf 0.14 cfs 0.04 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 49HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Discarded Stage-Discharge Discharge (cfs) 0.060.0550.050.0450.040.0350.030.0250.020.0150.010.0050 El e v a t i o n ( f e e t ) 61 60 59 58 Exfiltration Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Wetted Storage Stage-Area-Storage Storage (cubic-feet) 300250200150100500 Surface/Horizontal/Wetted Area (sq-ft) 300250200150100500 El e v a t i o n ( f e e t ) 61 60 59 58 Prismatoid + Prismatoid Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 50HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0 58.00 0.00 0.50 0.00 0 58.00 0.00 1.00 0.00 0 58.00 0.00 1.50 0.00 0 58.00 0.00 2.00 0.00 0 58.00 0.00 2.50 0.00 0 58.00 0.00 3.00 0.00 0 58.00 0.00 3.50 0.00 0 58.00 0.00 4.00 0.00 0 58.00 0.00 4.50 0.00 0 58.00 0.00 5.00 0.00 0 58.00 0.00 5.50 0.00 0 58.00 0.00 6.00 0.00 0 58.00 0.00 6.50 0.00 0 58.00 0.00 7.00 0.00 0 58.00 0.00 7.50 0.00 0 58.00 0.00 8.00 0.00 0 58.00 0.00 8.50 0.00 0 58.00 0.00 9.00 0.01 0 58.00 0.01 9.50 0.01 0 58.00 0.01 10.00 0.01 0 58.00 0.01 10.50 0.01 0 58.00 0.01 11.00 0.01 0 58.00 0.01 11.50 0.02 1 58.00 0.02 12.00 0.09 22 58.20 0.03 12.50 0.03 89 58.80 0.04 13.00 0.01 50 58.45 0.04 13.50 0.01 6 58.06 0.03 14.00 0.01 0 58.00 0.01 14.50 0.01 0 58.00 0.01 15.00 0.01 0 58.00 0.01 15.50 0.00 0 58.00 0.00 16.00 0.00 0 58.00 0.00 16.50 0.00 0 58.00 0.00 17.00 0.00 0 58.00 0.00 17.50 0.00 0 58.00 0.00 18.00 0.00 0 58.00 0.00 18.50 0.00 0 58.00 0.00 19.00 0.00 0 58.00 0.00 19.50 0.00 0 58.00 0.00 20.00 0.00 0 58.00 0.00 20.50 0.00 0 58.00 0.00 21.00 0.00 0 58.00 0.00 21.50 0.00 0 58.00 0.00 22.00 0.00 0 58.00 0.00 22.50 0.00 0 58.00 0.00 23.00 0.00 0 58.00 0.00 23.50 0.00 0 58.00 0.00 24.00 0.00 0 58.00 0.00 24.50 0.00 0 58.00 0.00 25.00 0.00 0 58.00 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 51HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Discarded (cfs) 58.00 0.00 58.02 0.03 58.04 0.03 58.06 0.03 58.08 0.03 58.10 0.03 58.12 0.03 58.14 0.03 58.16 0.03 58.18 0.03 58.20 0.03 58.22 0.03 58.24 0.03 58.26 0.03 58.28 0.03 58.30 0.03 58.32 0.03 58.34 0.04 58.36 0.04 58.38 0.04 58.40 0.04 58.42 0.04 58.44 0.04 58.46 0.04 58.48 0.04 58.50 0.04 58.52 0.04 58.54 0.04 58.56 0.04 58.58 0.04 58.60 0.04 58.62 0.04 58.64 0.04 58.66 0.04 58.68 0.04 58.70 0.04 58.72 0.04 58.74 0.04 58.76 0.04 58.78 0.04 58.80 0.04 58.82 0.04 58.84 0.04 58.86 0.04 58.88 0.04 58.90 0.04 58.92 0.04 58.94 0.04 58.96 0.04 58.98 0.04 59.00 0.04 59.02 0.04 Elevation (feet) Discarded (cfs) 59.04 0.04 59.06 0.04 59.08 0.04 59.10 0.04 59.12 0.04 59.14 0.04 59.16 0.04 59.18 0.04 59.20 0.04 59.22 0.04 59.24 0.04 59.26 0.05 59.28 0.05 59.30 0.05 59.32 0.05 59.34 0.05 59.36 0.05 59.38 0.05 59.40 0.05 59.42 0.05 59.44 0.05 59.46 0.05 59.48 0.05 59.50 0.05 59.52 0.05 59.54 0.05 59.56 0.05 59.58 0.05 59.60 0.05 59.62 0.05 59.64 0.05 59.66 0.05 59.68 0.05 59.70 0.05 59.72 0.05 59.74 0.05 59.76 0.05 59.78 0.05 59.80 0.05 59.82 0.05 59.84 0.05 59.86 0.05 59.88 0.05 59.90 0.05 59.92 0.05 59.94 0.05 59.96 0.05 59.98 0.05 60.00 0.05 60.02 0.05 60.04 0.05 60.06 0.05 Elevation (feet) Discarded (cfs) 60.08 0.05 60.10 0.05 60.12 0.05 60.14 0.05 60.16 0.05 60.18 0.05 60.20 0.06 60.22 0.06 60.24 0.06 60.26 0.06 60.28 0.06 60.30 0.06 60.32 0.06 60.34 0.06 60.36 0.06 60.38 0.06 60.40 0.06 60.42 0.06 60.44 0.06 60.46 0.06 60.48 0.06 60.50 0.06 60.52 0.06 60.54 0.06 60.56 0.06 60.58 0.06 60.60 0.06 60.62 0.06 60.64 0.06 60.66 0.06 60.68 0.06 60.70 0.06 60.72 0.06 60.74 0.06 60.76 0.06 60.78 0.06 60.80 0.06 60.82 0.06 60.84 0.06 60.86 0.06 60.88 0.06 60.90 0.06 60.92 0.06 60.94 0.06 60.96 0.06 60.98 0.06 61.00 0.06 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 52HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 58.00 164 0 58.05 167 6 58.10 170 11 58.15 173 17 58.20 175 22 58.25 178 28 58.30 181 33 58.35 184 39 58.40 187 44 58.45 190 50 58.50 192 56 58.55 195 61 58.60 198 67 58.65 201 72 58.70 204 78 58.75 206 83 58.80 209 89 58.85 212 94 58.90 215 100 58.95 218 105 59.00 220 111 59.05 223 117 59.10 226 122 59.15 229 128 59.20 232 133 59.25 235 139 59.30 237 144 59.35 240 150 59.40 243 155 59.45 246 161 59.50 249 167 59.55 251 172 59.60 254 178 59.65 257 183 59.70 260 189 59.75 263 194 59.80 266 200 59.85 268 205 59.90 271 211 59.95 274 217 60.00 277 222 60.05 280 228 60.10 282 233 60.15 285 239 60.20 288 244 60.25 291 250 60.30 294 255 60.35 296 261 60.40 299 267 60.45 302 272 60.50 305 278 60.55 308 283 Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 60.60 311 289 60.65 313 294 60.70 316 300 60.75 319 305 60.80 322 311 60.85 325 316 60.90 327 322 60.95 330 328 61.00 333 333 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 53HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Inflow Area = 0.422 ac, 0.00% Impervious, Inflow Depth = 0.35" for 10-Year event Inflow = 0.05 cfs @ 12.37 hrs, Volume= 0.012 af Outflow = 0.05 cfs @ 12.38 hrs, Volume= 0.012 af, Atten= 0%, Lag= 0.6 min Discarded = 0.05 cfs @ 12.38 hrs, Volume= 0.012 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 45.51' @ 12.38 hrs Surf.Area= 313 sf Storage= 2 cf Plug-Flow detention time= 0.6 min calculated for 0.012 af (100% of inflow) Center-of-Mass det. time= 0.6 min ( 969.5 - 968.9 ) Volume Invert Avail.Storage Storage Description #1 45.50' 240 cf 8.25'W x 37.90'L x 3.00'H Prismatoid 938 cf Overall - 405 cf Embedded = 533 cf x 45.0% Voids #2 45.50' 405 cf 4.25'W x 7.95'L x 3.00'H Prismatoid x 4 Inside #1 645 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 45.50'8.270 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.05 cfs @ 12.38 hrs HW=45.51' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.05 cfs) Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Inflow Discarded Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=0.422 ac Peak Elev=45.51' Storage=2 cf 0.05 cfs 0.05 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 54HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Discarded Stage-Discharge Discharge (cfs) 0.110.10.090.080.070.060.050.040.030.020.010 El e v a t i o n ( f e e t ) 48 47 46 Exfiltration Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Wetted Storage Stage-Area-Storage Storage (cubic-feet) 600550500450400350300250200150100500 Surface/Horizontal/Wetted Area (sq-ft) 550500450400350300250200150100500 El e v a t i o n ( f e e t ) 48 47 46 Prismatoid + Prismatoid Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 55HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0 45.50 0.00 0.50 0.00 0 45.50 0.00 1.00 0.00 0 45.50 0.00 1.50 0.00 0 45.50 0.00 2.00 0.00 0 45.50 0.00 2.50 0.00 0 45.50 0.00 3.00 0.00 0 45.50 0.00 3.50 0.00 0 45.50 0.00 4.00 0.00 0 45.50 0.00 4.50 0.00 0 45.50 0.00 5.00 0.00 0 45.50 0.00 5.50 0.00 0 45.50 0.00 6.00 0.00 0 45.50 0.00 6.50 0.00 0 45.50 0.00 7.00 0.00 0 45.50 0.00 7.50 0.00 0 45.50 0.00 8.00 0.00 0 45.50 0.00 8.50 0.00 0 45.50 0.00 9.00 0.00 0 45.50 0.00 9.50 0.00 0 45.50 0.00 10.00 0.00 0 45.50 0.00 10.50 0.00 0 45.50 0.00 11.00 0.00 0 45.50 0.00 11.50 0.00 0 45.50 0.00 12.00 0.00 0 45.50 0.00 12.50 0.04 2 45.51 0.04 13.00 0.02 1 45.50 0.02 13.50 0.02 1 45.50 0.02 14.00 0.02 1 45.50 0.02 14.50 0.02 1 45.50 0.02 15.00 0.02 1 45.50 0.02 15.50 0.02 1 45.50 0.02 16.00 0.01 0 45.50 0.01 16.50 0.01 0 45.50 0.01 17.00 0.01 0 45.50 0.01 17.50 0.01 0 45.50 0.01 18.00 0.01 0 45.50 0.01 18.50 0.01 0 45.50 0.01 19.00 0.01 0 45.50 0.01 19.50 0.01 0 45.50 0.01 20.00 0.01 0 45.50 0.01 20.50 0.01 0 45.50 0.01 21.00 0.01 0 45.50 0.01 21.50 0.01 0 45.50 0.01 22.00 0.01 0 45.50 0.01 22.50 0.01 0 45.50 0.01 23.00 0.01 0 45.50 0.01 23.50 0.01 0 45.50 0.01 24.00 0.01 0 45.50 0.01 24.50 0.00 0 45.50 0.00 25.00 0.00 0 45.50 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 56HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Discarded (cfs) 45.50 0.00 45.52 0.06 45.54 0.06 45.56 0.06 45.58 0.06 45.60 0.06 45.62 0.06 45.64 0.06 45.66 0.06 45.68 0.06 45.70 0.06 45.72 0.06 45.74 0.06 45.76 0.06 45.78 0.06 45.80 0.07 45.82 0.07 45.84 0.07 45.86 0.07 45.88 0.07 45.90 0.07 45.92 0.07 45.94 0.07 45.96 0.07 45.98 0.07 46.00 0.07 46.02 0.07 46.04 0.07 46.06 0.07 46.08 0.07 46.10 0.07 46.12 0.07 46.14 0.07 46.16 0.07 46.18 0.07 46.20 0.07 46.22 0.07 46.24 0.07 46.26 0.07 46.28 0.07 46.30 0.07 46.32 0.07 46.34 0.07 46.36 0.08 46.38 0.08 46.40 0.08 46.42 0.08 46.44 0.08 46.46 0.08 46.48 0.08 46.50 0.08 46.52 0.08 Elevation (feet) Discarded (cfs) 46.54 0.08 46.56 0.08 46.58 0.08 46.60 0.08 46.62 0.08 46.64 0.08 46.66 0.08 46.68 0.08 46.70 0.08 46.72 0.08 46.74 0.08 46.76 0.08 46.78 0.08 46.80 0.08 46.82 0.08 46.84 0.08 46.86 0.08 46.88 0.08 46.90 0.08 46.92 0.08 46.94 0.09 46.96 0.09 46.98 0.09 47.00 0.09 47.02 0.09 47.04 0.09 47.06 0.09 47.08 0.09 47.10 0.09 47.12 0.09 47.14 0.09 47.16 0.09 47.18 0.09 47.20 0.09 47.22 0.09 47.24 0.09 47.26 0.09 47.28 0.09 47.30 0.09 47.32 0.09 47.34 0.09 47.36 0.09 47.38 0.09 47.40 0.09 47.42 0.09 47.44 0.09 47.46 0.09 47.48 0.09 47.50 0.10 47.52 0.10 47.54 0.10 47.56 0.10 Elevation (feet) Discarded (cfs) 47.58 0.10 47.60 0.10 47.62 0.10 47.64 0.10 47.66 0.10 47.68 0.10 47.70 0.10 47.72 0.10 47.74 0.10 47.76 0.10 47.78 0.10 47.80 0.10 47.82 0.10 47.84 0.10 47.86 0.10 47.88 0.10 47.90 0.10 47.92 0.10 47.94 0.10 47.96 0.10 47.98 0.10 48.00 0.10 48.02 0.10 48.04 0.10 48.06 0.11 48.08 0.11 48.10 0.11 48.12 0.11 48.14 0.11 48.16 0.11 48.18 0.11 48.20 0.11 48.22 0.11 48.24 0.11 48.26 0.11 48.28 0.11 48.30 0.11 48.32 0.11 48.34 0.11 48.36 0.11 48.38 0.11 48.40 0.11 48.42 0.11 48.44 0.11 48.46 0.11 48.48 0.11 48.50 0.11 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 57HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 45.50 313 0 45.55 317 11 45.60 322 22 45.65 327 32 45.70 331 43 45.75 336 54 45.80 340 65 45.85 345 75 45.90 350 86 45.95 354 97 46.00 359 108 46.05 363 118 46.10 368 129 46.15 373 140 46.20 377 151 46.25 382 161 46.30 387 172 46.35 391 183 46.40 396 194 46.45 400 204 46.50 405 215 46.55 410 226 46.60 414 237 46.65 419 247 46.70 423 258 46.75 428 269 46.80 433 280 46.85 437 290 46.90 442 301 46.95 447 312 47.00 451 323 47.05 456 333 47.10 460 344 47.15 465 355 47.20 470 366 47.25 474 376 47.30 479 387 47.35 483 398 47.40 488 409 47.45 493 419 47.50 497 430 47.55 502 441 47.60 507 452 47.65 511 462 47.70 516 473 47.75 520 484 47.80 525 495 47.85 530 505 47.90 534 516 47.95 539 527 48.00 543 538 48.05 548 548 Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 48.10 553 559 48.15 557 570 48.20 562 581 48.25 567 591 48.30 571 602 48.35 576 613 48.40 580 624 48.45 585 634 48.50 590 645 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 58HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond CB1: Roof Leader - 6" ADS Pipe Inflow Area = 0.027 ac,100.00% Impervious, Inflow Depth = 5.06" for 10-Year event Inflow = 0.14 cfs @ 12.08 hrs, Volume= 0.011 af Outflow = 0.14 cfs @ 12.08 hrs, Volume= 0.011 af, Atten= 0%, Lag= 0.0 min Primary = 0.14 cfs @ 12.08 hrs, Volume= 0.011 af Routed to Pond 1P : One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 63.18' @ 12.08 hrs Device Routing Invert Outlet Devices #1 Primary 63.00'6.0" Round Culvert X 2.00 L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 63.00' / 61.00' S= 0.0667 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.20 sf Primary OutFlow Max=0.14 cfs @ 12.08 hrs HW=63.18' TW=58.43' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.14 cfs @ 1.13 fps) Pond CB1: Roof Leader - 6" ADS Pipe Inflow Primary Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.027 ac Peak Elev=63.18' 6.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0667 '/' 0.14 cfs 0.14 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 59HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond CB1: Roof Leader - 6" ADS Pipe Primary Stage-Discharge Discharge (cfs) 0.70.650.60.550.50.450.40.350.30.250.20.150.10.050 El e v a t i o n ( f e e t ) 63.5 63.48 63.46 63.44 63.42 63.4 63.38 63.36 63.34 63.32 63.3 63.28 63.26 63.24 63.22 63.2 63.18 63.16 63.14 63.12 63.1 63.08 63.06 63.04 63.02 63 Culvert Pond CB1: Roof Leader - 6" ADS Pipe Storage Stage-Area-Storage Storage (acre-feet) 0 El e v a t i o n ( f e e t ) 63.5 63.48 63.46 63.44 63.42 63.4 63.38 63.36 63.34 63.32 63.3 63.28 63.26 63.24 63.22 63.2 63.18 63.16 63.14 63.12 63.1 63.08 63.06 63.04 63.02 63 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 60HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond CB1: Roof Leader - 6" ADS Pipe Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 63.00 0.00 0.50 0.00 63.00 0.00 1.00 0.00 63.00 0.00 1.50 0.00 63.01 0.00 2.00 0.00 63.01 0.00 2.50 0.00 63.01 0.00 3.00 0.00 63.01 0.00 3.50 0.00 63.02 0.00 4.00 0.00 63.02 0.00 4.50 0.00 63.02 0.00 5.00 0.00 63.02 0.00 5.50 0.00 63.02 0.00 6.00 0.00 63.02 0.00 6.50 0.00 63.02 0.00 7.00 0.00 63.02 0.00 7.50 0.00 63.02 0.00 8.00 0.00 63.03 0.00 8.50 0.00 63.03 0.00 9.00 0.01 63.03 0.01 9.50 0.01 63.03 0.01 10.00 0.01 63.04 0.01 10.50 0.01 63.04 0.01 11.00 0.01 63.05 0.01 11.50 0.02 63.06 0.02 12.00 0.09 63.14 0.09 12.50 0.03 63.08 0.03 13.00 0.01 63.05 0.01 13.50 0.01 63.04 0.01 14.00 0.01 63.04 0.01 14.50 0.01 63.04 0.01 15.00 0.01 63.03 0.01 15.50 0.00 63.03 0.00 16.00 0.00 63.03 0.00 16.50 0.00 63.03 0.00 17.00 0.00 63.02 0.00 17.50 0.00 63.02 0.00 18.00 0.00 63.02 0.00 18.50 0.00 63.02 0.00 19.00 0.00 63.02 0.00 19.50 0.00 63.02 0.00 20.00 0.00 63.02 0.00 20.50 0.00 63.02 0.00 21.00 0.00 63.02 0.00 21.50 0.00 63.02 0.00 22.00 0.00 63.02 0.00 22.50 0.00 63.02 0.00 23.00 0.00 63.02 0.00 23.50 0.00 63.02 0.00 24.00 0.00 63.02 0.00 24.50 0.00 63.00 0.00 25.00 0.00 63.00 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 61HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond CB1: Roof Leader - 6" ADS Pipe Elevation (feet) Primary (cfs) 63.00 0.00 63.01 0.00 63.02 0.00 63.03 0.00 63.04 0.01 63.05 0.01 63.06 0.02 63.07 0.02 63.08 0.03 63.09 0.04 63.10 0.05 63.11 0.06 63.12 0.07 63.13 0.08 63.14 0.09 63.15 0.10 63.16 0.12 63.17 0.13 63.18 0.15 63.19 0.16 63.20 0.18 63.21 0.19 63.22 0.21 63.23 0.23 63.24 0.25 63.25 0.26 63.26 0.28 63.27 0.30 63.28 0.32 63.29 0.34 63.30 0.36 63.31 0.38 63.32 0.40 63.33 0.42 63.34 0.45 63.35 0.47 63.36 0.49 63.37 0.51 63.38 0.53 63.39 0.55 63.40 0.57 63.41 0.59 63.42 0.61 63.43 0.63 63.44 0.65 63.45 0.67 63.46 0.69 63.47 0.71 63.48 0.72 63.49 0.74 63.50 0.75 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 62HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond CB1: Roof Leader - 6" ADS Pipe Elevation (feet) Storage (acre-feet) 63.00 0.000 63.01 0.000 63.02 0.000 63.03 0.000 63.04 0.000 63.05 0.000 63.06 0.000 63.07 0.000 63.08 0.000 63.09 0.000 63.10 0.000 63.11 0.000 63.12 0.000 63.13 0.000 63.14 0.000 63.15 0.000 63.16 0.000 63.17 0.000 63.18 0.000 63.19 0.000 63.20 0.000 63.21 0.000 63.22 0.000 63.23 0.000 63.24 0.000 63.25 0.000 63.26 0.000 63.27 0.000 63.28 0.000 63.29 0.000 63.30 0.000 63.31 0.000 63.32 0.000 63.33 0.000 63.34 0.000 63.35 0.000 63.36 0.000 63.37 0.000 63.38 0.000 63.39 0.000 63.40 0.000 63.41 0.000 63.42 0.000 63.43 0.000 63.44 0.000 63.45 0.000 63.46 0.000 63.47 0.000 63.48 0.000 63.49 0.000 63.50 0.000 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 63HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond CB2: Catch Basin At Lower Driveway Inflow Area = 0.422 ac, 0.00% Impervious, Inflow Depth = 0.35" for 10-Year event Inflow = 0.05 cfs @ 12.37 hrs, Volume= 0.012 af Outflow = 0.05 cfs @ 12.37 hrs, Volume= 0.012 af, Atten= 0%, Lag= 0.0 min Primary = 0.05 cfs @ 12.37 hrs, Volume= 0.012 af Routed to Pond 2P : One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 49.14' @ 12.37 hrs Device Routing Invert Outlet Devices #1 Primary 49.00'12.0" Round Catch Basin L= 50.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 49.00' / 48.50' S= 0.0100 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.05 cfs @ 12.37 hrs HW=49.14' TW=45.51' (Dynamic Tailwater) 1=Catch Basin (Barrel Controls 0.05 cfs @ 1.21 fps) Pond CB2: Catch Basin At Lower Driveway Inflow Primary Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=0.422 ac Peak Elev=49.14' 12.0" Round Culvert n=0.020 L=50.0' S=0.0100 '/' 0.05 cfs 0.05 cfs Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 64HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond CB2: Catch Basin At Lower Driveway Primary Stage-Discharge Discharge (cfs) 210 El e v a t i o n ( f e e t ) 50 49 Catch Basin Pond CB2: Catch Basin At Lower Driveway Storage Stage-Area-Storage Storage (acre-feet) 0 El e v a t i o n ( f e e t ) 50 49 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 65HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond CB2: Catch Basin At Lower Driveway Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 49.00 0.00 0.50 0.00 49.00 0.00 1.00 0.00 49.00 0.00 1.50 0.00 49.00 0.00 2.00 0.00 49.00 0.00 2.50 0.00 49.00 0.00 3.00 0.00 49.00 0.00 3.50 0.00 49.00 0.00 4.00 0.00 49.00 0.00 4.50 0.00 49.00 0.00 5.00 0.00 49.00 0.00 5.50 0.00 49.00 0.00 6.00 0.00 49.00 0.00 6.50 0.00 49.00 0.00 7.00 0.00 49.00 0.00 7.50 0.00 49.00 0.00 8.00 0.00 49.00 0.00 8.50 0.00 49.00 0.00 9.00 0.00 49.00 0.00 9.50 0.00 49.00 0.00 10.00 0.00 49.00 0.00 10.50 0.00 49.00 0.00 11.00 0.00 49.00 0.00 11.50 0.00 49.00 0.00 12.00 0.00 49.00 0.00 12.50 0.04 49.13 0.04 13.00 0.02 49.10 0.02 13.50 0.02 49.09 0.02 14.00 0.02 49.09 0.02 14.50 0.02 49.08 0.02 15.00 0.02 49.08 0.02 15.50 0.02 49.08 0.02 16.00 0.01 49.07 0.01 16.50 0.01 49.07 0.01 17.00 0.01 49.07 0.01 17.50 0.01 49.06 0.01 18.00 0.01 49.06 0.01 18.50 0.01 49.06 0.01 19.00 0.01 49.06 0.01 19.50 0.01 49.06 0.01 20.00 0.01 49.05 0.01 20.50 0.01 49.05 0.01 21.00 0.01 49.05 0.01 21.50 0.01 49.05 0.01 22.00 0.01 49.05 0.01 22.50 0.01 49.05 0.01 23.00 0.01 49.05 0.01 23.50 0.01 49.05 0.01 24.00 0.01 49.05 0.01 24.50 0.00 49.00 0.00 25.00 0.00 49.00 0.00 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 66HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond CB2: Catch Basin At Lower Driveway Elevation (feet) Primary (cfs) 49.00 0.00 49.01 0.00 49.02 0.00 49.03 0.00 49.04 0.00 49.05 0.01 49.06 0.01 49.07 0.01 49.08 0.02 49.09 0.02 49.10 0.03 49.11 0.03 49.12 0.04 49.13 0.05 49.14 0.05 49.15 0.06 49.16 0.07 49.17 0.08 49.18 0.09 49.19 0.10 49.20 0.11 49.21 0.12 49.22 0.13 49.23 0.15 49.24 0.16 49.25 0.17 49.26 0.19 49.27 0.20 49.28 0.22 49.29 0.23 49.30 0.25 49.31 0.27 49.32 0.28 49.33 0.30 49.34 0.32 49.35 0.34 49.36 0.35 49.37 0.37 49.38 0.39 49.39 0.41 49.40 0.43 49.41 0.45 49.42 0.48 49.43 0.50 49.44 0.52 49.45 0.54 49.46 0.56 49.47 0.59 49.48 0.61 49.49 0.63 49.50 0.66 49.51 0.68 Elevation (feet) Primary (cfs) 49.52 0.70 49.53 0.73 49.54 0.75 49.55 0.78 49.56 0.80 49.57 0.83 49.58 0.85 49.59 0.88 49.60 0.91 49.61 0.93 49.62 0.96 49.63 0.99 49.64 1.01 49.65 1.04 49.66 1.07 49.67 1.09 49.68 1.12 49.69 1.15 49.70 1.18 49.71 1.21 49.72 1.23 49.73 1.26 49.74 1.29 49.75 1.32 49.76 1.35 49.77 1.37 49.78 1.40 49.79 1.43 49.80 1.46 49.81 1.49 49.82 1.51 49.83 1.54 49.84 1.57 49.85 1.60 49.86 1.63 49.87 1.66 49.88 1.68 49.89 1.71 49.90 1.74 49.91 1.77 49.92 1.79 49.93 1.82 49.94 1.85 49.95 1.87 49.96 1.90 49.97 1.93 49.98 1.95 49.99 1.98 50.00 2.01 Type III 24-hr 10-Year Rainfall=5.30"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 67HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond CB2: Catch Basin At Lower Driveway Elevation (feet) Storage (acre-feet) 49.00 0.000 49.01 0.000 49.02 0.000 49.03 0.000 49.04 0.000 49.05 0.000 49.06 0.000 49.07 0.000 49.08 0.000 49.09 0.000 49.10 0.000 49.11 0.000 49.12 0.000 49.13 0.000 49.14 0.000 49.15 0.000 49.16 0.000 49.17 0.000 49.18 0.000 49.19 0.000 49.20 0.000 49.21 0.000 49.22 0.000 49.23 0.000 49.24 0.000 49.25 0.000 49.26 0.000 49.27 0.000 49.28 0.000 49.29 0.000 49.30 0.000 49.31 0.000 49.32 0.000 49.33 0.000 49.34 0.000 49.35 0.000 49.36 0.000 49.37 0.000 49.38 0.000 49.39 0.000 49.40 0.000 49.41 0.000 49.42 0.000 49.43 0.000 49.44 0.000 49.45 0.000 49.46 0.000 49.47 0.000 49.48 0.000 49.49 0.000 49.50 0.000 49.51 0.000 Elevation (feet) Storage (acre-feet) 49.52 0.000 49.53 0.000 49.54 0.000 49.55 0.000 49.56 0.000 49.57 0.000 49.58 0.000 49.59 0.000 49.60 0.000 49.61 0.000 49.62 0.000 49.63 0.000 49.64 0.000 49.65 0.000 49.66 0.000 49.67 0.000 49.68 0.000 49.69 0.000 49.70 0.000 49.71 0.000 49.72 0.000 49.73 0.000 49.74 0.000 49.75 0.000 49.76 0.000 49.77 0.000 49.78 0.000 49.79 0.000 49.80 0.000 49.81 0.000 49.82 0.000 49.83 0.000 49.84 0.000 49.85 0.000 49.86 0.000 49.87 0.000 49.88 0.000 49.89 0.000 49.90 0.000 49.91 0.000 49.92 0.000 49.93 0.000 49.94 0.000 49.95 0.000 49.96 0.000 49.97 0.000 49.98 0.000 49.99 0.000 50.00 0.000 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 68HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1Ex: Existing Parcel Area Runoff = 0.02 cfs @ 14.90 hrs, Volume= 0.016 af, Depth= 0.13" Routed to Reach 1Dis : Pre- Dev Peak Discharge Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.50" Area (sf) CN Description 61,160 30 Woods, Good, HSG A 61,160 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 1Ex: Existing Parcel Area Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Type III 24-hr 25-Year Rainfall=6.50" Runoff Area=61,160 sf Runoff Volume=0.016 af Runoff Depth=0.13" Tc=6.0 min CN=30 0.02 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 69HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1Ex: Existing Parcel Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.13 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.20 0.00 0.00 3.50 0.24 0.00 0.00 4.00 0.28 0.00 0.00 4.50 0.32 0.00 0.00 5.00 0.37 0.00 0.00 5.50 0.42 0.00 0.00 6.00 0.47 0.00 0.00 6.50 0.52 0.00 0.00 7.00 0.59 0.00 0.00 7.50 0.66 0.00 0.00 8.00 0.74 0.00 0.00 8.50 0.83 0.00 0.00 9.00 0.95 0.00 0.00 9.50 1.08 0.00 0.00 10.00 1.23 0.00 0.00 10.50 1.41 0.00 0.00 11.00 1.63 0.00 0.00 11.50 1.94 0.00 0.00 12.00 3.25 0.00 0.00 12.50 4.56 0.00 0.00 13.00 4.87 0.00 0.01 13.50 5.09 0.01 0.02 14.00 5.27 0.02 0.02 14.50 5.42 0.02 0.02 15.00 5.55 0.03 0.02 15.50 5.67 0.04 0.02 16.00 5.76 0.05 0.02 16.50 5.84 0.06 0.02 17.00 5.91 0.06 0.02 17.50 5.98 0.07 0.02 18.00 6.03 0.08 0.02 18.50 6.08 0.08 0.02 19.00 6.13 0.09 0.02 19.50 6.18 0.09 0.01 20.00 6.22 0.10 0.01 20.50 6.26 0.10 0.01 21.00 6.30 0.11 0.01 21.50 6.34 0.11 0.01 22.00 6.37 0.12 0.01 22.50 6.41 0.12 0.01 23.00 6.44 0.13 0.01 23.50 6.47 0.13 0.01 24.00 6.50 0.13 0.01 24.50 6.50 0.13 0.00 25.00 6.50 0.13 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 70HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Roof Runoff Runoff = 0.17 cfs @ 12.08 hrs, Volume= 0.014 af, Depth= 6.26" Routed to Pond CB1 : Roof Leader - 6" ADS Pipe Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.50" Area (sf) CN Description * 1,184 98 Roof Area 1,184 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 1S: Roof Runoff Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type III 24-hr 25-Year Rainfall=6.50" Runoff Area=1,184 sf Runoff Volume=0.014 af Runoff Depth=6.26" Tc=6.0 min CN=98 0.17 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 71HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Roof Runoff Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.01 0.00 2.00 0.13 0.03 0.00 2.50 0.16 0.05 0.00 3.00 0.20 0.07 0.00 3.50 0.24 0.10 0.00 4.00 0.28 0.13 0.00 4.50 0.32 0.16 0.00 5.00 0.37 0.20 0.00 5.50 0.42 0.24 0.00 6.00 0.47 0.29 0.00 6.50 0.52 0.34 0.00 7.00 0.59 0.40 0.00 7.50 0.66 0.47 0.00 8.00 0.74 0.54 0.00 8.50 0.83 0.63 0.01 9.00 0.95 0.74 0.01 9.50 1.08 0.87 0.01 10.00 1.23 1.01 0.01 10.50 1.41 1.19 0.01 11.00 1.63 1.40 0.01 11.50 1.94 1.71 0.02 12.00 3.25 3.02 0.11 12.50 4.56 4.33 0.04 13.00 4.87 4.64 0.01 13.50 5.09 4.86 0.01 14.00 5.27 5.03 0.01 14.50 5.42 5.18 0.01 15.00 5.55 5.32 0.01 15.50 5.67 5.43 0.01 16.00 5.76 5.52 0.00 16.50 5.84 5.60 0.00 17.00 5.91 5.67 0.00 17.50 5.98 5.74 0.00 18.00 6.03 5.79 0.00 18.50 6.08 5.84 0.00 19.00 6.13 5.89 0.00 19.50 6.18 5.94 0.00 20.00 6.22 5.98 0.00 20.50 6.26 6.02 0.00 21.00 6.30 6.06 0.00 21.50 6.34 6.10 0.00 22.00 6.37 6.14 0.00 22.50 6.41 6.17 0.00 23.00 6.44 6.20 0.00 23.50 6.47 6.23 0.00 24.00 6.50 6.26 0.00 24.50 6.50 6.26 0.00 25.00 6.50 6.26 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 72HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Gravel Driveway & Landscape Aras Runoff = 0.18 cfs @ 12.14 hrs, Volume= 0.026 af, Depth= 0.73" Routed to Pond CB2 : Catch Basin At Lower Driveway Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.50" Area (sf) CN Description 10,000 30 Woods, Good, HSG A 3,400 76 Gravel roads, HSG A 5,000 39 >75% Grass cover, Good, HSG A 18,400 41 Weighted Average 18,400 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 2S: Gravel Driveway & Landscape Aras Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type III 24-hr 25-Year Rainfall=6.50" Runoff Area=18,400 sf Runoff Volume=0.026 af Runoff Depth=0.73" Tc=6.0 min CN=41 0.18 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 73HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Gravel Driveway & Landscape Aras Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.13 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.20 0.00 0.00 3.50 0.24 0.00 0.00 4.00 0.28 0.00 0.00 4.50 0.32 0.00 0.00 5.00 0.37 0.00 0.00 5.50 0.42 0.00 0.00 6.00 0.47 0.00 0.00 6.50 0.52 0.00 0.00 7.00 0.59 0.00 0.00 7.50 0.66 0.00 0.00 8.00 0.74 0.00 0.00 8.50 0.83 0.00 0.00 9.00 0.95 0.00 0.00 9.50 1.08 0.00 0.00 10.00 1.23 0.00 0.00 10.50 1.41 0.00 0.00 11.00 1.63 0.00 0.00 11.50 1.94 0.00 0.00 12.00 3.25 0.01 0.01 12.50 4.56 0.18 0.10 13.00 4.87 0.24 0.05 13.50 5.09 0.30 0.04 14.00 5.27 0.34 0.04 14.50 5.42 0.38 0.03 15.00 5.55 0.42 0.03 15.50 5.67 0.45 0.03 16.00 5.76 0.48 0.02 16.50 5.84 0.51 0.02 17.00 5.91 0.53 0.02 17.50 5.98 0.55 0.02 18.00 6.03 0.57 0.01 18.50 6.08 0.58 0.01 19.00 6.13 0.60 0.01 19.50 6.18 0.62 0.01 20.00 6.22 0.63 0.01 20.50 6.26 0.64 0.01 21.00 6.30 0.66 0.01 21.50 6.34 0.67 0.01 22.00 6.37 0.68 0.01 22.50 6.41 0.70 0.01 23.00 6.44 0.71 0.01 23.50 6.47 0.72 0.01 24.00 6.50 0.73 0.01 24.50 6.50 0.73 0.00 25.00 6.50 0.73 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 74HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Undeveloped Areas of Parcel Runoff = 0.02 cfs @ 14.90 hrs, Volume= 0.011 af, Depth= 0.13" Routed to Reach 4R : POST DEVELOPMENT PEAK DISCHARGE Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.50" Area (sf) CN Description 41,760 30 Woods, Good, HSG A 41,760 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 3S: Undeveloped Areas of Parcel Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Type III 24-hr 25-Year Rainfall=6.50" Runoff Area=41,760 sf Runoff Volume=0.011 af Runoff Depth=0.13" Tc=6.0 min CN=30 0.02 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 75HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: Undeveloped Areas of Parcel Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.13 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.20 0.00 0.00 3.50 0.24 0.00 0.00 4.00 0.28 0.00 0.00 4.50 0.32 0.00 0.00 5.00 0.37 0.00 0.00 5.50 0.42 0.00 0.00 6.00 0.47 0.00 0.00 6.50 0.52 0.00 0.00 7.00 0.59 0.00 0.00 7.50 0.66 0.00 0.00 8.00 0.74 0.00 0.00 8.50 0.83 0.00 0.00 9.00 0.95 0.00 0.00 9.50 1.08 0.00 0.00 10.00 1.23 0.00 0.00 10.50 1.41 0.00 0.00 11.00 1.63 0.00 0.00 11.50 1.94 0.00 0.00 12.00 3.25 0.00 0.00 12.50 4.56 0.00 0.00 13.00 4.87 0.00 0.01 13.50 5.09 0.01 0.01 14.00 5.27 0.02 0.02 14.50 5.42 0.02 0.02 15.00 5.55 0.03 0.02 15.50 5.67 0.04 0.02 16.00 5.76 0.05 0.01 16.50 5.84 0.06 0.01 17.00 5.91 0.06 0.01 17.50 5.98 0.07 0.01 18.00 6.03 0.08 0.01 18.50 6.08 0.08 0.01 19.00 6.13 0.09 0.01 19.50 6.18 0.09 0.01 20.00 6.22 0.10 0.01 20.50 6.26 0.10 0.01 21.00 6.30 0.11 0.01 21.50 6.34 0.11 0.01 22.00 6.37 0.12 0.01 22.50 6.41 0.12 0.01 23.00 6.44 0.13 0.01 23.50 6.47 0.13 0.01 24.00 6.50 0.13 0.01 24.50 6.50 0.13 0.00 25.00 6.50 0.13 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 76HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1Dis: Pre- Dev Peak Discharge Inflow Area = 1.404 ac, 0.00% Impervious, Inflow Depth = 0.13" for 25-Year event Inflow = 0.02 cfs @ 14.90 hrs, Volume= 0.016 af Outflow = 0.02 cfs @ 14.90 hrs, Volume= 0.016 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Reach 1Dis: Pre- Dev Peak Discharge Inflow Outflow Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Inflow Area=1.404 ac 0.02 cfs 0.02 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 77HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 1Dis: Pre- Dev Peak Discharge Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.00 0.00 12.50 0.00 0.00 13.00 0.01 0.01 13.50 0.02 0.02 14.00 0.02 0.02 14.50 0.02 0.02 15.00 0.02 0.02 15.50 0.02 0.02 16.00 0.02 0.02 16.50 0.02 0.02 17.00 0.02 0.02 17.50 0.02 0.02 18.00 0.02 0.02 18.50 0.02 0.02 19.00 0.02 0.02 19.50 0.01 0.01 20.00 0.01 0.01 20.50 0.01 0.01 21.00 0.01 0.01 21.50 0.01 0.01 22.00 0.01 0.01 22.50 0.01 0.01 23.00 0.01 0.01 23.50 0.01 0.01 24.00 0.01 0.01 24.50 0.00 0.00 25.00 0.00 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 78HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Inflow Area = 0.959 ac, 0.00% Impervious, Inflow Depth = 0.13" for 25-Year event Inflow = 0.02 cfs @ 14.90 hrs, Volume= 0.011 af Outflow = 0.02 cfs @ 14.90 hrs, Volume= 0.011 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Inflow Outflow Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Inflow Area=0.959 ac 0.02 cfs 0.02 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 79HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.00 0.00 12.50 0.00 0.00 13.00 0.01 0.01 13.50 0.01 0.01 14.00 0.02 0.02 14.50 0.02 0.02 15.00 0.02 0.02 15.50 0.02 0.02 16.00 0.01 0.01 16.50 0.01 0.01 17.00 0.01 0.01 17.50 0.01 0.01 18.00 0.01 0.01 18.50 0.01 0.01 19.00 0.01 0.01 19.50 0.01 0.01 20.00 0.01 0.01 20.50 0.01 0.01 21.00 0.01 0.01 21.50 0.01 0.01 22.00 0.01 0.01 22.50 0.01 0.01 23.00 0.01 0.01 23.50 0.01 0.01 24.00 0.01 0.01 24.50 0.00 0.00 25.00 0.00 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 80HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Inflow Area = 0.027 ac,100.00% Impervious, Inflow Depth = 6.26" for 25-Year event Inflow = 0.17 cfs @ 12.08 hrs, Volume= 0.014 af Outflow = 0.04 cfs @ 12.45 hrs, Volume= 0.014 af, Atten= 75%, Lag= 21.8 min Discarded = 0.04 cfs @ 12.45 hrs, Volume= 0.014 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 59.16' @ 12.45 hrs Surf.Area= 164 sf Storage= 128 cf Plug-Flow detention time= 15.2 min calculated for 0.014 af (100% of inflow) Center-of-Mass det. time= 15.2 min ( 759.2 - 744.0 ) Volume Invert Avail.Storage Storage Description #1 58.00' 130 cf 8.25'W x 19.90'L x 3.00'H Prismatoid 493 cf Overall - 203 cf Embedded = 290 cf x 45.0% Voids #2 58.00' 203 cf 4.25'W x 15.90'L x 3.00'H Prismatoid Inside #1 333 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 58.00'8.270 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.04 cfs @ 12.45 hrs HW=59.16' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Inflow Discarded Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.027 ac Peak Elev=59.16' Storage=128 cf 0.17 cfs 0.04 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 81HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Discarded Stage-Discharge Discharge (cfs) 0.060.0550.050.0450.040.0350.030.0250.020.0150.010.0050 El e v a t i o n ( f e e t ) 61 60 59 58 Exfiltration Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Wetted Storage Stage-Area-Storage Storage (cubic-feet) 300250200150100500 Surface/Horizontal/Wetted Area (sq-ft) 300250200150100500 El e v a t i o n ( f e e t ) 61 60 59 58 Prismatoid + Prismatoid Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 82HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0 58.00 0.00 0.50 0.00 0 58.00 0.00 1.00 0.00 0 58.00 0.00 1.50 0.00 0 58.00 0.00 2.00 0.00 0 58.00 0.00 2.50 0.00 0 58.00 0.00 3.00 0.00 0 58.00 0.00 3.50 0.00 0 58.00 0.00 4.00 0.00 0 58.00 0.00 4.50 0.00 0 58.00 0.00 5.00 0.00 0 58.00 0.00 5.50 0.00 0 58.00 0.00 6.00 0.00 0 58.00 0.00 6.50 0.00 0 58.00 0.00 7.00 0.00 0 58.00 0.00 7.50 0.00 0 58.00 0.00 8.00 0.00 0 58.00 0.00 8.50 0.01 0 58.00 0.01 9.00 0.01 0 58.00 0.01 9.50 0.01 0 58.00 0.01 10.00 0.01 0 58.00 0.01 10.50 0.01 0 58.00 0.01 11.00 0.01 0 58.00 0.01 11.50 0.02 1 58.01 0.02 12.00 0.11 34 58.31 0.03 12.50 0.04 128 59.15 0.04 13.00 0.01 88 58.79 0.04 13.50 0.01 43 58.38 0.04 14.00 0.01 1 58.01 0.02 14.50 0.01 0 58.00 0.01 15.00 0.01 0 58.00 0.01 15.50 0.01 0 58.00 0.01 16.00 0.00 0 58.00 0.00 16.50 0.00 0 58.00 0.00 17.00 0.00 0 58.00 0.00 17.50 0.00 0 58.00 0.00 18.00 0.00 0 58.00 0.00 18.50 0.00 0 58.00 0.00 19.00 0.00 0 58.00 0.00 19.50 0.00 0 58.00 0.00 20.00 0.00 0 58.00 0.00 20.50 0.00 0 58.00 0.00 21.00 0.00 0 58.00 0.00 21.50 0.00 0 58.00 0.00 22.00 0.00 0 58.00 0.00 22.50 0.00 0 58.00 0.00 23.00 0.00 0 58.00 0.00 23.50 0.00 0 58.00 0.00 24.00 0.00 0 58.00 0.00 24.50 0.00 0 58.00 0.00 25.00 0.00 0 58.00 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 83HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Discarded (cfs) 58.00 0.00 58.02 0.03 58.04 0.03 58.06 0.03 58.08 0.03 58.10 0.03 58.12 0.03 58.14 0.03 58.16 0.03 58.18 0.03 58.20 0.03 58.22 0.03 58.24 0.03 58.26 0.03 58.28 0.03 58.30 0.03 58.32 0.03 58.34 0.04 58.36 0.04 58.38 0.04 58.40 0.04 58.42 0.04 58.44 0.04 58.46 0.04 58.48 0.04 58.50 0.04 58.52 0.04 58.54 0.04 58.56 0.04 58.58 0.04 58.60 0.04 58.62 0.04 58.64 0.04 58.66 0.04 58.68 0.04 58.70 0.04 58.72 0.04 58.74 0.04 58.76 0.04 58.78 0.04 58.80 0.04 58.82 0.04 58.84 0.04 58.86 0.04 58.88 0.04 58.90 0.04 58.92 0.04 58.94 0.04 58.96 0.04 58.98 0.04 59.00 0.04 59.02 0.04 Elevation (feet) Discarded (cfs) 59.04 0.04 59.06 0.04 59.08 0.04 59.10 0.04 59.12 0.04 59.14 0.04 59.16 0.04 59.18 0.04 59.20 0.04 59.22 0.04 59.24 0.04 59.26 0.05 59.28 0.05 59.30 0.05 59.32 0.05 59.34 0.05 59.36 0.05 59.38 0.05 59.40 0.05 59.42 0.05 59.44 0.05 59.46 0.05 59.48 0.05 59.50 0.05 59.52 0.05 59.54 0.05 59.56 0.05 59.58 0.05 59.60 0.05 59.62 0.05 59.64 0.05 59.66 0.05 59.68 0.05 59.70 0.05 59.72 0.05 59.74 0.05 59.76 0.05 59.78 0.05 59.80 0.05 59.82 0.05 59.84 0.05 59.86 0.05 59.88 0.05 59.90 0.05 59.92 0.05 59.94 0.05 59.96 0.05 59.98 0.05 60.00 0.05 60.02 0.05 60.04 0.05 60.06 0.05 Elevation (feet) Discarded (cfs) 60.08 0.05 60.10 0.05 60.12 0.05 60.14 0.05 60.16 0.05 60.18 0.05 60.20 0.06 60.22 0.06 60.24 0.06 60.26 0.06 60.28 0.06 60.30 0.06 60.32 0.06 60.34 0.06 60.36 0.06 60.38 0.06 60.40 0.06 60.42 0.06 60.44 0.06 60.46 0.06 60.48 0.06 60.50 0.06 60.52 0.06 60.54 0.06 60.56 0.06 60.58 0.06 60.60 0.06 60.62 0.06 60.64 0.06 60.66 0.06 60.68 0.06 60.70 0.06 60.72 0.06 60.74 0.06 60.76 0.06 60.78 0.06 60.80 0.06 60.82 0.06 60.84 0.06 60.86 0.06 60.88 0.06 60.90 0.06 60.92 0.06 60.94 0.06 60.96 0.06 60.98 0.06 61.00 0.06 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 84HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 58.00 164 0 58.05 167 6 58.10 170 11 58.15 173 17 58.20 175 22 58.25 178 28 58.30 181 33 58.35 184 39 58.40 187 44 58.45 190 50 58.50 192 56 58.55 195 61 58.60 198 67 58.65 201 72 58.70 204 78 58.75 206 83 58.80 209 89 58.85 212 94 58.90 215 100 58.95 218 105 59.00 220 111 59.05 223 117 59.10 226 122 59.15 229 128 59.20 232 133 59.25 235 139 59.30 237 144 59.35 240 150 59.40 243 155 59.45 246 161 59.50 249 167 59.55 251 172 59.60 254 178 59.65 257 183 59.70 260 189 59.75 263 194 59.80 266 200 59.85 268 205 59.90 271 211 59.95 274 217 60.00 277 222 60.05 280 228 60.10 282 233 60.15 285 239 60.20 288 244 60.25 291 250 60.30 294 255 60.35 296 261 60.40 299 267 60.45 302 272 60.50 305 278 60.55 308 283 Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 60.60 311 289 60.65 313 294 60.70 316 300 60.75 319 305 60.80 322 311 60.85 325 316 60.90 327 322 60.95 330 328 61.00 333 333 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 85HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Inflow Area = 0.422 ac, 0.00% Impervious, Inflow Depth = 0.73" for 25-Year event Inflow = 0.18 cfs @ 12.14 hrs, Volume= 0.026 af Outflow = 0.07 cfs @ 12.60 hrs, Volume= 0.026 af, Atten= 60%, Lag= 27.6 min Discarded = 0.07 cfs @ 12.60 hrs, Volume= 0.026 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 46.13' @ 12.60 hrs Surf.Area= 313 sf Storage= 136 cf Plug-Flow detention time= 10.1 min calculated for 0.026 af (100% of inflow) Center-of-Mass det. time= 10.1 min ( 939.4 - 929.3 ) Volume Invert Avail.Storage Storage Description #1 45.50' 240 cf 8.25'W x 37.90'L x 3.00'H Prismatoid 938 cf Overall - 405 cf Embedded = 533 cf x 45.0% Voids #2 45.50' 405 cf 4.25'W x 7.95'L x 3.00'H Prismatoid x 4 Inside #1 645 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 45.50'8.270 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.07 cfs @ 12.60 hrs HW=46.13' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.07 cfs) Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Inflow Discarded Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.422 ac Peak Elev=46.13' Storage=136 cf 0.18 cfs 0.07 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 86HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Discarded Stage-Discharge Discharge (cfs) 0.110.10.090.080.070.060.050.040.030.020.010 El e v a t i o n ( f e e t ) 48 47 46 Exfiltration Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Wetted Storage Stage-Area-Storage Storage (cubic-feet) 600550500450400350300250200150100500 Surface/Horizontal/Wetted Area (sq-ft) 550500450400350300250200150100500 El e v a t i o n ( f e e t ) 48 47 46 Prismatoid + Prismatoid Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 87HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0 45.50 0.00 0.50 0.00 0 45.50 0.00 1.00 0.00 0 45.50 0.00 1.50 0.00 0 45.50 0.00 2.00 0.00 0 45.50 0.00 2.50 0.00 0 45.50 0.00 3.00 0.00 0 45.50 0.00 3.50 0.00 0 45.50 0.00 4.00 0.00 0 45.50 0.00 4.50 0.00 0 45.50 0.00 5.00 0.00 0 45.50 0.00 5.50 0.00 0 45.50 0.00 6.00 0.00 0 45.50 0.00 6.50 0.00 0 45.50 0.00 7.00 0.00 0 45.50 0.00 7.50 0.00 0 45.50 0.00 8.00 0.00 0 45.50 0.00 8.50 0.00 0 45.50 0.00 9.00 0.00 0 45.50 0.00 9.50 0.00 0 45.50 0.00 10.00 0.00 0 45.50 0.00 10.50 0.00 0 45.50 0.00 11.00 0.00 0 45.50 0.00 11.50 0.00 0 45.50 0.00 12.00 0.01 0 45.50 0.00 12.50 0.10 131 46.11 0.07 13.00 0.05 120 46.06 0.07 13.50 0.04 79 45.87 0.07 14.00 0.04 35 45.66 0.06 14.50 0.03 1 45.51 0.03 15.00 0.03 1 45.51 0.03 15.50 0.03 1 45.50 0.03 16.00 0.02 1 45.50 0.02 16.50 0.02 1 45.50 0.02 17.00 0.02 1 45.50 0.02 17.50 0.02 1 45.50 0.02 18.00 0.01 1 45.50 0.01 18.50 0.01 1 45.50 0.01 19.00 0.01 0 45.50 0.01 19.50 0.01 0 45.50 0.01 20.00 0.01 0 45.50 0.01 20.50 0.01 0 45.50 0.01 21.00 0.01 0 45.50 0.01 21.50 0.01 0 45.50 0.01 22.00 0.01 0 45.50 0.01 22.50 0.01 0 45.50 0.01 23.00 0.01 0 45.50 0.01 23.50 0.01 0 45.50 0.01 24.00 0.01 0 45.50 0.01 24.50 0.00 0 45.50 0.00 25.00 0.00 0 45.50 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 88HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Discarded (cfs) 45.50 0.00 45.52 0.06 45.54 0.06 45.56 0.06 45.58 0.06 45.60 0.06 45.62 0.06 45.64 0.06 45.66 0.06 45.68 0.06 45.70 0.06 45.72 0.06 45.74 0.06 45.76 0.06 45.78 0.06 45.80 0.07 45.82 0.07 45.84 0.07 45.86 0.07 45.88 0.07 45.90 0.07 45.92 0.07 45.94 0.07 45.96 0.07 45.98 0.07 46.00 0.07 46.02 0.07 46.04 0.07 46.06 0.07 46.08 0.07 46.10 0.07 46.12 0.07 46.14 0.07 46.16 0.07 46.18 0.07 46.20 0.07 46.22 0.07 46.24 0.07 46.26 0.07 46.28 0.07 46.30 0.07 46.32 0.07 46.34 0.07 46.36 0.08 46.38 0.08 46.40 0.08 46.42 0.08 46.44 0.08 46.46 0.08 46.48 0.08 46.50 0.08 46.52 0.08 Elevation (feet) Discarded (cfs) 46.54 0.08 46.56 0.08 46.58 0.08 46.60 0.08 46.62 0.08 46.64 0.08 46.66 0.08 46.68 0.08 46.70 0.08 46.72 0.08 46.74 0.08 46.76 0.08 46.78 0.08 46.80 0.08 46.82 0.08 46.84 0.08 46.86 0.08 46.88 0.08 46.90 0.08 46.92 0.08 46.94 0.09 46.96 0.09 46.98 0.09 47.00 0.09 47.02 0.09 47.04 0.09 47.06 0.09 47.08 0.09 47.10 0.09 47.12 0.09 47.14 0.09 47.16 0.09 47.18 0.09 47.20 0.09 47.22 0.09 47.24 0.09 47.26 0.09 47.28 0.09 47.30 0.09 47.32 0.09 47.34 0.09 47.36 0.09 47.38 0.09 47.40 0.09 47.42 0.09 47.44 0.09 47.46 0.09 47.48 0.09 47.50 0.10 47.52 0.10 47.54 0.10 47.56 0.10 Elevation (feet) Discarded (cfs) 47.58 0.10 47.60 0.10 47.62 0.10 47.64 0.10 47.66 0.10 47.68 0.10 47.70 0.10 47.72 0.10 47.74 0.10 47.76 0.10 47.78 0.10 47.80 0.10 47.82 0.10 47.84 0.10 47.86 0.10 47.88 0.10 47.90 0.10 47.92 0.10 47.94 0.10 47.96 0.10 47.98 0.10 48.00 0.10 48.02 0.10 48.04 0.10 48.06 0.11 48.08 0.11 48.10 0.11 48.12 0.11 48.14 0.11 48.16 0.11 48.18 0.11 48.20 0.11 48.22 0.11 48.24 0.11 48.26 0.11 48.28 0.11 48.30 0.11 48.32 0.11 48.34 0.11 48.36 0.11 48.38 0.11 48.40 0.11 48.42 0.11 48.44 0.11 48.46 0.11 48.48 0.11 48.50 0.11 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 89HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 45.50 313 0 45.55 317 11 45.60 322 22 45.65 327 32 45.70 331 43 45.75 336 54 45.80 340 65 45.85 345 75 45.90 350 86 45.95 354 97 46.00 359 108 46.05 363 118 46.10 368 129 46.15 373 140 46.20 377 151 46.25 382 161 46.30 387 172 46.35 391 183 46.40 396 194 46.45 400 204 46.50 405 215 46.55 410 226 46.60 414 237 46.65 419 247 46.70 423 258 46.75 428 269 46.80 433 280 46.85 437 290 46.90 442 301 46.95 447 312 47.00 451 323 47.05 456 333 47.10 460 344 47.15 465 355 47.20 470 366 47.25 474 376 47.30 479 387 47.35 483 398 47.40 488 409 47.45 493 419 47.50 497 430 47.55 502 441 47.60 507 452 47.65 511 462 47.70 516 473 47.75 520 484 47.80 525 495 47.85 530 505 47.90 534 516 47.95 539 527 48.00 543 538 48.05 548 548 Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 48.10 553 559 48.15 557 570 48.20 562 581 48.25 567 591 48.30 571 602 48.35 576 613 48.40 580 624 48.45 585 634 48.50 590 645 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 90HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond CB1: Roof Leader - 6" ADS Pipe Inflow Area = 0.027 ac,100.00% Impervious, Inflow Depth = 6.26" for 25-Year event Inflow = 0.17 cfs @ 12.08 hrs, Volume= 0.014 af Outflow = 0.17 cfs @ 12.08 hrs, Volume= 0.014 af, Atten= 0%, Lag= 0.0 min Primary = 0.17 cfs @ 12.08 hrs, Volume= 0.014 af Routed to Pond 1P : One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 63.20' @ 12.08 hrs Device Routing Invert Outlet Devices #1 Primary 63.00'6.0" Round Culvert X 2.00 L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 63.00' / 61.00' S= 0.0667 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.20 sf Primary OutFlow Max=0.17 cfs @ 12.08 hrs HW=63.20' TW=58.61' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.17 cfs @ 1.20 fps) Pond CB1: Roof Leader - 6" ADS Pipe Inflow Primary Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.027 ac Peak Elev=63.20' 6.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0667 '/' 0.17 cfs 0.17 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 91HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond CB1: Roof Leader - 6" ADS Pipe Primary Stage-Discharge Discharge (cfs) 0.70.650.60.550.50.450.40.350.30.250.20.150.10.050 El e v a t i o n ( f e e t ) 63.5 63.48 63.46 63.44 63.42 63.4 63.38 63.36 63.34 63.32 63.3 63.28 63.26 63.24 63.22 63.2 63.18 63.16 63.14 63.12 63.1 63.08 63.06 63.04 63.02 63 Culvert Pond CB1: Roof Leader - 6" ADS Pipe Storage Stage-Area-Storage Storage (acre-feet) 0 El e v a t i o n ( f e e t ) 63.5 63.48 63.46 63.44 63.42 63.4 63.38 63.36 63.34 63.32 63.3 63.28 63.26 63.24 63.22 63.2 63.18 63.16 63.14 63.12 63.1 63.08 63.06 63.04 63.02 63 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 92HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond CB1: Roof Leader - 6" ADS Pipe Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 63.00 0.00 0.50 0.00 63.00 0.00 1.00 0.00 63.01 0.00 1.50 0.00 63.01 0.00 2.00 0.00 63.01 0.00 2.50 0.00 63.01 0.00 3.00 0.00 63.02 0.00 3.50 0.00 63.02 0.00 4.00 0.00 63.02 0.00 4.50 0.00 63.02 0.00 5.00 0.00 63.02 0.00 5.50 0.00 63.02 0.00 6.00 0.00 63.02 0.00 6.50 0.00 63.02 0.00 7.00 0.00 63.03 0.00 7.50 0.00 63.03 0.00 8.00 0.00 63.03 0.00 8.50 0.01 63.03 0.01 9.00 0.01 63.04 0.01 9.50 0.01 63.04 0.01 10.00 0.01 63.04 0.01 10.50 0.01 63.05 0.01 11.00 0.01 63.05 0.01 11.50 0.02 63.06 0.02 12.00 0.11 63.15 0.11 12.50 0.04 63.09 0.04 13.00 0.01 63.05 0.01 13.50 0.01 63.05 0.01 14.00 0.01 63.04 0.01 14.50 0.01 63.04 0.01 15.00 0.01 63.04 0.01 15.50 0.01 63.03 0.01 16.00 0.00 63.03 0.00 16.50 0.00 63.03 0.00 17.00 0.00 63.03 0.00 17.50 0.00 63.03 0.00 18.00 0.00 63.02 0.00 18.50 0.00 63.02 0.00 19.00 0.00 63.02 0.00 19.50 0.00 63.02 0.00 20.00 0.00 63.02 0.00 20.50 0.00 63.02 0.00 21.00 0.00 63.02 0.00 21.50 0.00 63.02 0.00 22.00 0.00 63.02 0.00 22.50 0.00 63.02 0.00 23.00 0.00 63.02 0.00 23.50 0.00 63.02 0.00 24.00 0.00 63.02 0.00 24.50 0.00 63.00 0.00 25.00 0.00 63.00 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 93HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond CB1: Roof Leader - 6" ADS Pipe Elevation (feet) Primary (cfs) 63.00 0.00 63.01 0.00 63.02 0.00 63.03 0.00 63.04 0.01 63.05 0.01 63.06 0.02 63.07 0.02 63.08 0.03 63.09 0.04 63.10 0.05 63.11 0.06 63.12 0.07 63.13 0.08 63.14 0.09 63.15 0.10 63.16 0.12 63.17 0.13 63.18 0.15 63.19 0.16 63.20 0.18 63.21 0.19 63.22 0.21 63.23 0.23 63.24 0.25 63.25 0.26 63.26 0.28 63.27 0.30 63.28 0.32 63.29 0.34 63.30 0.36 63.31 0.38 63.32 0.40 63.33 0.42 63.34 0.45 63.35 0.47 63.36 0.49 63.37 0.51 63.38 0.53 63.39 0.55 63.40 0.57 63.41 0.59 63.42 0.61 63.43 0.63 63.44 0.65 63.45 0.67 63.46 0.69 63.47 0.71 63.48 0.72 63.49 0.74 63.50 0.75 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 94HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond CB1: Roof Leader - 6" ADS Pipe Elevation (feet) Storage (acre-feet) 63.00 0.000 63.01 0.000 63.02 0.000 63.03 0.000 63.04 0.000 63.05 0.000 63.06 0.000 63.07 0.000 63.08 0.000 63.09 0.000 63.10 0.000 63.11 0.000 63.12 0.000 63.13 0.000 63.14 0.000 63.15 0.000 63.16 0.000 63.17 0.000 63.18 0.000 63.19 0.000 63.20 0.000 63.21 0.000 63.22 0.000 63.23 0.000 63.24 0.000 63.25 0.000 63.26 0.000 63.27 0.000 63.28 0.000 63.29 0.000 63.30 0.000 63.31 0.000 63.32 0.000 63.33 0.000 63.34 0.000 63.35 0.000 63.36 0.000 63.37 0.000 63.38 0.000 63.39 0.000 63.40 0.000 63.41 0.000 63.42 0.000 63.43 0.000 63.44 0.000 63.45 0.000 63.46 0.000 63.47 0.000 63.48 0.000 63.49 0.000 63.50 0.000 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 95HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond CB2: Catch Basin At Lower Driveway Inflow Area = 0.422 ac, 0.00% Impervious, Inflow Depth = 0.73" for 25-Year event Inflow = 0.18 cfs @ 12.14 hrs, Volume= 0.026 af Outflow = 0.18 cfs @ 12.14 hrs, Volume= 0.026 af, Atten= 0%, Lag= 0.0 min Primary = 0.18 cfs @ 12.14 hrs, Volume= 0.026 af Routed to Pond 2P : One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 49.25' @ 12.14 hrs Device Routing Invert Outlet Devices #1 Primary 49.00'12.0" Round Catch Basin L= 50.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 49.00' / 48.50' S= 0.0100 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.18 cfs @ 12.14 hrs HW=49.25' TW=45.63' (Dynamic Tailwater) 1=Catch Basin (Barrel Controls 0.18 cfs @ 1.71 fps) Pond CB2: Catch Basin At Lower Driveway Inflow Primary Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.422 ac Peak Elev=49.25' 12.0" Round Culvert n=0.020 L=50.0' S=0.0100 '/' 0.18 cfs 0.18 cfs Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 96HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond CB2: Catch Basin At Lower Driveway Primary Stage-Discharge Discharge (cfs) 210 El e v a t i o n ( f e e t ) 50 49 Catch Basin Pond CB2: Catch Basin At Lower Driveway Storage Stage-Area-Storage Storage (acre-feet) 0 El e v a t i o n ( f e e t ) 50 49 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 97HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond CB2: Catch Basin At Lower Driveway Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 49.00 0.00 0.50 0.00 49.00 0.00 1.00 0.00 49.00 0.00 1.50 0.00 49.00 0.00 2.00 0.00 49.00 0.00 2.50 0.00 49.00 0.00 3.00 0.00 49.00 0.00 3.50 0.00 49.00 0.00 4.00 0.00 49.00 0.00 4.50 0.00 49.00 0.00 5.00 0.00 49.00 0.00 5.50 0.00 49.00 0.00 6.00 0.00 49.00 0.00 6.50 0.00 49.00 0.00 7.00 0.00 49.00 0.00 7.50 0.00 49.00 0.00 8.00 0.00 49.00 0.00 8.50 0.00 49.00 0.00 9.00 0.00 49.00 0.00 9.50 0.00 49.00 0.00 10.00 0.00 49.00 0.00 10.50 0.00 49.00 0.00 11.00 0.00 49.00 0.00 11.50 0.00 49.00 0.00 12.00 0.01 49.05 0.01 12.50 0.10 49.19 0.10 13.00 0.05 49.14 0.05 13.50 0.04 49.13 0.04 14.00 0.04 49.12 0.04 14.50 0.03 49.11 0.03 15.00 0.03 49.11 0.03 15.50 0.03 49.10 0.03 16.00 0.02 49.09 0.02 16.50 0.02 49.09 0.02 17.00 0.02 49.09 0.02 17.50 0.02 49.08 0.02 18.00 0.01 49.08 0.01 18.50 0.01 49.07 0.01 19.00 0.01 49.07 0.01 19.50 0.01 49.07 0.01 20.00 0.01 49.07 0.01 20.50 0.01 49.07 0.01 21.00 0.01 49.07 0.01 21.50 0.01 49.07 0.01 22.00 0.01 49.07 0.01 22.50 0.01 49.06 0.01 23.00 0.01 49.06 0.01 23.50 0.01 49.06 0.01 24.00 0.01 49.06 0.01 24.50 0.00 49.00 0.00 25.00 0.00 49.00 0.00 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 98HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond CB2: Catch Basin At Lower Driveway Elevation (feet) Primary (cfs) 49.00 0.00 49.01 0.00 49.02 0.00 49.03 0.00 49.04 0.00 49.05 0.01 49.06 0.01 49.07 0.01 49.08 0.02 49.09 0.02 49.10 0.03 49.11 0.03 49.12 0.04 49.13 0.05 49.14 0.05 49.15 0.06 49.16 0.07 49.17 0.08 49.18 0.09 49.19 0.10 49.20 0.11 49.21 0.12 49.22 0.13 49.23 0.15 49.24 0.16 49.25 0.17 49.26 0.19 49.27 0.20 49.28 0.22 49.29 0.23 49.30 0.25 49.31 0.27 49.32 0.28 49.33 0.30 49.34 0.32 49.35 0.34 49.36 0.35 49.37 0.37 49.38 0.39 49.39 0.41 49.40 0.43 49.41 0.45 49.42 0.48 49.43 0.50 49.44 0.52 49.45 0.54 49.46 0.56 49.47 0.59 49.48 0.61 49.49 0.63 49.50 0.66 49.51 0.68 Elevation (feet) Primary (cfs) 49.52 0.70 49.53 0.73 49.54 0.75 49.55 0.78 49.56 0.80 49.57 0.83 49.58 0.85 49.59 0.88 49.60 0.91 49.61 0.93 49.62 0.96 49.63 0.99 49.64 1.01 49.65 1.04 49.66 1.07 49.67 1.09 49.68 1.12 49.69 1.15 49.70 1.18 49.71 1.21 49.72 1.23 49.73 1.26 49.74 1.29 49.75 1.32 49.76 1.35 49.77 1.37 49.78 1.40 49.79 1.43 49.80 1.46 49.81 1.49 49.82 1.51 49.83 1.54 49.84 1.57 49.85 1.60 49.86 1.63 49.87 1.66 49.88 1.68 49.89 1.71 49.90 1.74 49.91 1.77 49.92 1.79 49.93 1.82 49.94 1.85 49.95 1.87 49.96 1.90 49.97 1.93 49.98 1.95 49.99 1.98 50.00 2.01 Type III 24-hr 25-Year Rainfall=6.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 99HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond CB2: Catch Basin At Lower Driveway Elevation (feet) Storage (acre-feet) 49.00 0.000 49.01 0.000 49.02 0.000 49.03 0.000 49.04 0.000 49.05 0.000 49.06 0.000 49.07 0.000 49.08 0.000 49.09 0.000 49.10 0.000 49.11 0.000 49.12 0.000 49.13 0.000 49.14 0.000 49.15 0.000 49.16 0.000 49.17 0.000 49.18 0.000 49.19 0.000 49.20 0.000 49.21 0.000 49.22 0.000 49.23 0.000 49.24 0.000 49.25 0.000 49.26 0.000 49.27 0.000 49.28 0.000 49.29 0.000 49.30 0.000 49.31 0.000 49.32 0.000 49.33 0.000 49.34 0.000 49.35 0.000 49.36 0.000 49.37 0.000 49.38 0.000 49.39 0.000 49.40 0.000 49.41 0.000 49.42 0.000 49.43 0.000 49.44 0.000 49.45 0.000 49.46 0.000 49.47 0.000 49.48 0.000 49.49 0.000 49.50 0.000 49.51 0.000 Elevation (feet) Storage (acre-feet) 49.52 0.000 49.53 0.000 49.54 0.000 49.55 0.000 49.56 0.000 49.57 0.000 49.58 0.000 49.59 0.000 49.60 0.000 49.61 0.000 49.62 0.000 49.63 0.000 49.64 0.000 49.65 0.000 49.66 0.000 49.67 0.000 49.68 0.000 49.69 0.000 49.70 0.000 49.71 0.000 49.72 0.000 49.73 0.000 49.74 0.000 49.75 0.000 49.76 0.000 49.77 0.000 49.78 0.000 49.79 0.000 49.80 0.000 49.81 0.000 49.82 0.000 49.83 0.000 49.84 0.000 49.85 0.000 49.86 0.000 49.87 0.000 49.88 0.000 49.89 0.000 49.90 0.000 49.91 0.000 49.92 0.000 49.93 0.000 49.94 0.000 49.95 0.000 49.96 0.000 49.97 0.000 49.98 0.000 49.99 0.000 50.00 0.000 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 100HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1Ex: Existing Parcel Area Runoff = 0.27 cfs @ 12.38 hrs, Volume= 0.063 af, Depth= 0.54" Routed to Reach 1Dis : Pre- Dev Peak Discharge Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.50" Area (sf) CN Description 61,160 30 Woods, Good, HSG A 61,160 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 1Ex: Existing Parcel Area Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 100-Year Rainfall=8.50" Runoff Area=61,160 sf Runoff Volume=0.063 af Runoff Depth=0.54" Tc=6.0 min CN=30 0.27 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 101HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1Ex: Existing Parcel Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.04 0.00 0.00 1.00 0.08 0.00 0.00 1.50 0.13 0.00 0.00 2.00 0.17 0.00 0.00 2.50 0.21 0.00 0.00 3.00 0.26 0.00 0.00 3.50 0.31 0.00 0.00 4.00 0.37 0.00 0.00 4.50 0.42 0.00 0.00 5.00 0.48 0.00 0.00 5.50 0.55 0.00 0.00 6.00 0.61 0.00 0.00 6.50 0.69 0.00 0.00 7.00 0.77 0.00 0.00 7.50 0.86 0.00 0.00 8.00 0.97 0.00 0.00 8.50 1.09 0.00 0.00 9.00 1.24 0.00 0.00 9.50 1.41 0.00 0.00 10.00 1.61 0.00 0.00 10.50 1.84 0.00 0.00 11.00 2.12 0.00 0.00 11.50 2.53 0.00 0.00 12.00 4.25 0.00 0.00 12.50 5.97 0.07 0.22 13.00 6.37 0.12 0.12 13.50 6.66 0.16 0.11 14.00 6.89 0.19 0.10 14.50 7.09 0.23 0.09 15.00 7.26 0.26 0.09 15.50 7.41 0.29 0.08 16.00 7.53 0.31 0.07 16.50 7.64 0.34 0.06 17.00 7.73 0.36 0.06 17.50 7.81 0.37 0.05 18.00 7.89 0.39 0.04 18.50 7.95 0.41 0.04 19.00 8.02 0.42 0.04 19.50 8.08 0.44 0.04 20.00 8.13 0.45 0.04 20.50 8.19 0.46 0.04 21.00 8.24 0.47 0.04 21.50 8.29 0.49 0.03 22.00 8.34 0.50 0.03 22.50 8.38 0.51 0.03 23.00 8.42 0.52 0.03 23.50 8.46 0.53 0.03 24.00 8.50 0.54 0.03 24.50 8.50 0.54 0.00 25.00 8.50 0.54 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 102HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Roof Runoff Runoff = 0.23 cfs @ 12.08 hrs, Volume= 0.019 af, Depth= 8.26" Routed to Pond CB1 : Roof Leader - 6" ADS Pipe Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.50" Area (sf) CN Description * 1,184 98 Roof Area 1,184 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 1S: Roof Runoff Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type III 24-hr 100-Year Rainfall=8.50" Runoff Area=1,184 sf Runoff Volume=0.019 af Runoff Depth=8.26" Tc=6.0 min CN=98 0.23 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 103HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Roof Runoff Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.04 0.00 0.00 1.00 0.08 0.01 0.00 1.50 0.13 0.03 0.00 2.00 0.17 0.05 0.00 2.50 0.21 0.08 0.00 3.00 0.26 0.11 0.00 3.50 0.31 0.15 0.00 4.00 0.37 0.20 0.00 4.50 0.42 0.25 0.00 5.00 0.48 0.30 0.00 5.50 0.55 0.36 0.00 6.00 0.61 0.42 0.00 6.50 0.69 0.49 0.00 7.00 0.77 0.57 0.00 7.50 0.86 0.66 0.01 8.00 0.97 0.76 0.01 8.50 1.09 0.88 0.01 9.00 1.24 1.02 0.01 9.50 1.41 1.19 0.01 10.00 1.61 1.39 0.01 10.50 1.84 1.62 0.01 11.00 2.12 1.90 0.02 11.50 2.53 2.30 0.03 12.00 4.25 4.01 0.14 12.50 5.97 5.73 0.05 13.00 6.37 6.14 0.02 13.50 6.66 6.42 0.01 14.00 6.89 6.65 0.01 14.50 7.09 6.85 0.01 15.00 7.26 7.02 0.01 15.50 7.41 7.17 0.01 16.00 7.53 7.29 0.01 16.50 7.64 7.40 0.01 17.00 7.73 7.49 0.00 17.50 7.81 7.58 0.00 18.00 7.89 7.65 0.00 18.50 7.95 7.71 0.00 19.00 8.02 7.78 0.00 19.50 8.08 7.84 0.00 20.00 8.13 7.89 0.00 20.50 8.19 7.95 0.00 21.00 8.24 8.00 0.00 21.50 8.29 8.05 0.00 22.00 8.34 8.10 0.00 22.50 8.38 8.14 0.00 23.00 8.42 8.18 0.00 23.50 8.46 8.22 0.00 24.00 8.50 8.26 0.00 24.50 8.50 8.26 0.00 25.00 8.50 8.26 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 104HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Gravel Driveway & Landscape Aras Runoff = 0.61 cfs @ 12.11 hrs, Volume= 0.056 af, Depth= 1.58" Routed to Pond CB2 : Catch Basin At Lower Driveway Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.50" Area (sf) CN Description 10,000 30 Woods, Good, HSG A 3,400 76 Gravel roads, HSG A 5,000 39 >75% Grass cover, Good, HSG A 18,400 41 Weighted Average 18,400 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 2S: Gravel Driveway & Landscape Aras Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type III 24-hr 100-Year Rainfall=8.50" Runoff Area=18,400 sf Runoff Volume=0.056 af Runoff Depth=1.58" Tc=6.0 min CN=41 0.61 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 105HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Gravel Driveway & Landscape Aras Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.04 0.00 0.00 1.00 0.08 0.00 0.00 1.50 0.13 0.00 0.00 2.00 0.17 0.00 0.00 2.50 0.21 0.00 0.00 3.00 0.26 0.00 0.00 3.50 0.31 0.00 0.00 4.00 0.37 0.00 0.00 4.50 0.42 0.00 0.00 5.00 0.48 0.00 0.00 5.50 0.55 0.00 0.00 6.00 0.61 0.00 0.00 6.50 0.69 0.00 0.00 7.00 0.77 0.00 0.00 7.50 0.86 0.00 0.00 8.00 0.97 0.00 0.00 8.50 1.09 0.00 0.00 9.00 1.24 0.00 0.00 9.50 1.41 0.00 0.00 10.00 1.61 0.00 0.00 10.50 1.84 0.00 0.00 11.00 2.12 0.00 0.00 11.50 2.53 0.00 0.00 12.00 4.25 0.12 0.22 12.50 5.97 0.55 0.23 13.00 6.37 0.68 0.10 13.50 6.66 0.79 0.08 14.00 6.89 0.88 0.07 14.50 7.09 0.95 0.06 15.00 7.26 1.02 0.06 15.50 7.41 1.08 0.05 16.00 7.53 1.14 0.04 16.50 7.64 1.18 0.04 17.00 7.73 1.22 0.03 17.50 7.81 1.26 0.03 18.00 7.89 1.29 0.03 18.50 7.95 1.32 0.03 19.00 8.02 1.35 0.02 19.50 8.08 1.38 0.02 20.00 8.13 1.41 0.02 20.50 8.19 1.43 0.02 21.00 8.24 1.46 0.02 21.50 8.29 1.48 0.02 22.00 8.34 1.50 0.02 22.50 8.38 1.52 0.02 23.00 8.42 1.54 0.02 23.50 8.46 1.56 0.02 24.00 8.50 1.58 0.02 24.50 8.50 1.58 0.00 25.00 8.50 1.58 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 106HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Undeveloped Areas of Parcel Runoff = 0.18 cfs @ 12.38 hrs, Volume= 0.043 af, Depth= 0.54" Routed to Reach 4R : POST DEVELOPMENT PEAK DISCHARGE Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.50" Area (sf) CN Description 41,760 30 Woods, Good, HSG A 41,760 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Minimum Subcatchment 3S: Undeveloped Areas of Parcel Runoff Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type III 24-hr 100-Year Rainfall=8.50" Runoff Area=41,760 sf Runoff Volume=0.043 af Runoff Depth=0.54" Tc=6.0 min CN=30 0.18 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 107HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: Undeveloped Areas of Parcel Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.04 0.00 0.00 1.00 0.08 0.00 0.00 1.50 0.13 0.00 0.00 2.00 0.17 0.00 0.00 2.50 0.21 0.00 0.00 3.00 0.26 0.00 0.00 3.50 0.31 0.00 0.00 4.00 0.37 0.00 0.00 4.50 0.42 0.00 0.00 5.00 0.48 0.00 0.00 5.50 0.55 0.00 0.00 6.00 0.61 0.00 0.00 6.50 0.69 0.00 0.00 7.00 0.77 0.00 0.00 7.50 0.86 0.00 0.00 8.00 0.97 0.00 0.00 8.50 1.09 0.00 0.00 9.00 1.24 0.00 0.00 9.50 1.41 0.00 0.00 10.00 1.61 0.00 0.00 10.50 1.84 0.00 0.00 11.00 2.12 0.00 0.00 11.50 2.53 0.00 0.00 12.00 4.25 0.00 0.00 12.50 5.97 0.07 0.15 13.00 6.37 0.12 0.09 13.50 6.66 0.16 0.08 14.00 6.89 0.19 0.07 14.50 7.09 0.23 0.06 15.00 7.26 0.26 0.06 15.50 7.41 0.29 0.05 16.00 7.53 0.31 0.05 16.50 7.64 0.34 0.04 17.00 7.73 0.36 0.04 17.50 7.81 0.37 0.03 18.00 7.89 0.39 0.03 18.50 7.95 0.41 0.03 19.00 8.02 0.42 0.03 19.50 8.08 0.44 0.03 20.00 8.13 0.45 0.03 20.50 8.19 0.46 0.03 21.00 8.24 0.47 0.02 21.50 8.29 0.49 0.02 22.00 8.34 0.50 0.02 22.50 8.38 0.51 0.02 23.00 8.42 0.52 0.02 23.50 8.46 0.53 0.02 24.00 8.50 0.54 0.02 24.50 8.50 0.54 0.00 25.00 8.50 0.54 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 108HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1Dis: Pre- Dev Peak Discharge Inflow Area = 1.404 ac, 0.00% Impervious, Inflow Depth = 0.54" for 100-Year event Inflow = 0.27 cfs @ 12.38 hrs, Volume= 0.063 af Outflow = 0.27 cfs @ 12.38 hrs, Volume= 0.063 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Reach 1Dis: Pre- Dev Peak Discharge Inflow Outflow Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=1.404 ac 0.27 cfs 0.27 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 109HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 1Dis: Pre- Dev Peak Discharge Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.00 0.00 12.50 0.22 0.22 13.00 0.12 0.12 13.50 0.11 0.11 14.00 0.10 0.10 14.50 0.09 0.09 15.00 0.09 0.09 15.50 0.08 0.08 16.00 0.07 0.07 16.50 0.06 0.06 17.00 0.06 0.06 17.50 0.05 0.05 18.00 0.04 0.04 18.50 0.04 0.04 19.00 0.04 0.04 19.50 0.04 0.04 20.00 0.04 0.04 20.50 0.04 0.04 21.00 0.04 0.04 21.50 0.03 0.03 22.00 0.03 0.03 22.50 0.03 0.03 23.00 0.03 0.03 23.50 0.03 0.03 24.00 0.03 0.03 24.50 0.00 0.00 25.00 0.00 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 110HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Inflow Area = 0.959 ac, 0.00% Impervious, Inflow Depth = 0.54" for 100-Year event Inflow = 0.18 cfs @ 12.38 hrs, Volume= 0.043 af Outflow = 0.18 cfs @ 12.38 hrs, Volume= 0.043 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Inflow Outflow Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.959 ac 0.18 cfs 0.18 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 111HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 4R: POST DEVELOPMENT PEAK DISCHARGE Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.00 0.00 12.50 0.15 0.15 13.00 0.09 0.09 13.50 0.08 0.08 14.00 0.07 0.07 14.50 0.06 0.06 15.00 0.06 0.06 15.50 0.05 0.05 16.00 0.05 0.05 16.50 0.04 0.04 17.00 0.04 0.04 17.50 0.03 0.03 18.00 0.03 0.03 18.50 0.03 0.03 19.00 0.03 0.03 19.50 0.03 0.03 20.00 0.03 0.03 20.50 0.03 0.03 21.00 0.02 0.02 21.50 0.02 0.02 22.00 0.02 0.02 22.50 0.02 0.02 23.00 0.02 0.02 23.50 0.02 0.02 24.00 0.02 0.02 24.50 0.00 0.00 25.00 0.00 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 112HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Inflow Area = 0.027 ac,100.00% Impervious, Inflow Depth = 8.26" for 100-Year event Inflow = 0.23 cfs @ 12.08 hrs, Volume= 0.019 af Outflow = 0.05 cfs @ 12.48 hrs, Volume= 0.019 af, Atten= 78%, Lag= 24.0 min Discarded = 0.05 cfs @ 12.48 hrs, Volume= 0.019 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 59.74' @ 12.48 hrs Surf.Area= 164 sf Storage= 193 cf Plug-Flow detention time= 22.0 min calculated for 0.019 af (100% of inflow) Center-of-Mass det. time= 22.0 min ( 762.5 - 740.5 ) Volume Invert Avail.Storage Storage Description #1 58.00' 130 cf 8.25'W x 19.90'L x 3.00'H Prismatoid 493 cf Overall - 203 cf Embedded = 290 cf x 45.0% Voids #2 58.00' 203 cf 4.25'W x 15.90'L x 3.00'H Prismatoid Inside #1 333 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 58.00'8.270 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.05 cfs @ 12.48 hrs HW=59.74' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.05 cfs) Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Inflow Discarded Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.027 ac Peak Elev=59.74' Storage=193 cf 0.23 cfs 0.05 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 113HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Discarded Stage-Discharge Discharge (cfs) 0.060.0550.050.0450.040.0350.030.0250.020.0150.010.0050 El e v a t i o n ( f e e t ) 61 60 59 58 Exfiltration Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Wetted Storage Stage-Area-Storage Storage (cubic-feet) 300250200150100500 Surface/Horizontal/Wetted Area (sq-ft) 300250200150100500 El e v a t i o n ( f e e t ) 61 60 59 58 Prismatoid + Prismatoid Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 114HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0 58.00 0.00 0.50 0.00 0 58.00 0.00 1.00 0.00 0 58.00 0.00 1.50 0.00 0 58.00 0.00 2.00 0.00 0 58.00 0.00 2.50 0.00 0 58.00 0.00 3.00 0.00 0 58.00 0.00 3.50 0.00 0 58.00 0.00 4.00 0.00 0 58.00 0.00 4.50 0.00 0 58.00 0.00 5.00 0.00 0 58.00 0.00 5.50 0.00 0 58.00 0.00 6.00 0.00 0 58.00 0.00 6.50 0.00 0 58.00 0.00 7.00 0.00 0 58.00 0.00 7.50 0.01 0 58.00 0.01 8.00 0.01 0 58.00 0.01 8.50 0.01 0 58.00 0.01 9.00 0.01 0 58.00 0.01 9.50 0.01 0 58.00 0.01 10.00 0.01 0 58.00 0.01 10.50 0.01 0 58.00 0.01 11.00 0.02 1 58.01 0.02 11.50 0.03 1 58.01 0.03 12.00 0.14 57 58.51 0.04 12.50 0.05 193 59.74 0.05 13.00 0.02 153 59.38 0.05 13.50 0.01 104 58.93 0.04 14.00 0.01 57 58.51 0.04 14.50 0.01 14 58.13 0.03 15.00 0.01 0 58.00 0.01 15.50 0.01 0 58.00 0.01 16.00 0.01 0 58.00 0.01 16.50 0.01 0 58.00 0.01 17.00 0.00 0 58.00 0.01 17.50 0.00 0 58.00 0.00 18.00 0.00 0 58.00 0.00 18.50 0.00 0 58.00 0.00 19.00 0.00 0 58.00 0.00 19.50 0.00 0 58.00 0.00 20.00 0.00 0 58.00 0.00 20.50 0.00 0 58.00 0.00 21.00 0.00 0 58.00 0.00 21.50 0.00 0 58.00 0.00 22.00 0.00 0 58.00 0.00 22.50 0.00 0 58.00 0.00 23.00 0.00 0 58.00 0.00 23.50 0.00 0 58.00 0.00 24.00 0.00 0 58.00 0.00 24.50 0.00 0 58.00 0.00 25.00 0.00 0 58.00 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 115HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Discarded (cfs) 58.00 0.00 58.02 0.03 58.04 0.03 58.06 0.03 58.08 0.03 58.10 0.03 58.12 0.03 58.14 0.03 58.16 0.03 58.18 0.03 58.20 0.03 58.22 0.03 58.24 0.03 58.26 0.03 58.28 0.03 58.30 0.03 58.32 0.03 58.34 0.04 58.36 0.04 58.38 0.04 58.40 0.04 58.42 0.04 58.44 0.04 58.46 0.04 58.48 0.04 58.50 0.04 58.52 0.04 58.54 0.04 58.56 0.04 58.58 0.04 58.60 0.04 58.62 0.04 58.64 0.04 58.66 0.04 58.68 0.04 58.70 0.04 58.72 0.04 58.74 0.04 58.76 0.04 58.78 0.04 58.80 0.04 58.82 0.04 58.84 0.04 58.86 0.04 58.88 0.04 58.90 0.04 58.92 0.04 58.94 0.04 58.96 0.04 58.98 0.04 59.00 0.04 59.02 0.04 Elevation (feet) Discarded (cfs) 59.04 0.04 59.06 0.04 59.08 0.04 59.10 0.04 59.12 0.04 59.14 0.04 59.16 0.04 59.18 0.04 59.20 0.04 59.22 0.04 59.24 0.04 59.26 0.05 59.28 0.05 59.30 0.05 59.32 0.05 59.34 0.05 59.36 0.05 59.38 0.05 59.40 0.05 59.42 0.05 59.44 0.05 59.46 0.05 59.48 0.05 59.50 0.05 59.52 0.05 59.54 0.05 59.56 0.05 59.58 0.05 59.60 0.05 59.62 0.05 59.64 0.05 59.66 0.05 59.68 0.05 59.70 0.05 59.72 0.05 59.74 0.05 59.76 0.05 59.78 0.05 59.80 0.05 59.82 0.05 59.84 0.05 59.86 0.05 59.88 0.05 59.90 0.05 59.92 0.05 59.94 0.05 59.96 0.05 59.98 0.05 60.00 0.05 60.02 0.05 60.04 0.05 60.06 0.05 Elevation (feet) Discarded (cfs) 60.08 0.05 60.10 0.05 60.12 0.05 60.14 0.05 60.16 0.05 60.18 0.05 60.20 0.06 60.22 0.06 60.24 0.06 60.26 0.06 60.28 0.06 60.30 0.06 60.32 0.06 60.34 0.06 60.36 0.06 60.38 0.06 60.40 0.06 60.42 0.06 60.44 0.06 60.46 0.06 60.48 0.06 60.50 0.06 60.52 0.06 60.54 0.06 60.56 0.06 60.58 0.06 60.60 0.06 60.62 0.06 60.64 0.06 60.66 0.06 60.68 0.06 60.70 0.06 60.72 0.06 60.74 0.06 60.76 0.06 60.78 0.06 60.80 0.06 60.82 0.06 60.84 0.06 60.86 0.06 60.88 0.06 60.90 0.06 60.92 0.06 60.94 0.06 60.96 0.06 60.98 0.06 61.00 0.06 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 116HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 1P: One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 58.00 164 0 58.05 167 6 58.10 170 11 58.15 173 17 58.20 175 22 58.25 178 28 58.30 181 33 58.35 184 39 58.40 187 44 58.45 190 50 58.50 192 56 58.55 195 61 58.60 198 67 58.65 201 72 58.70 204 78 58.75 206 83 58.80 209 89 58.85 212 94 58.90 215 100 58.95 218 105 59.00 220 111 59.05 223 117 59.10 226 122 59.15 229 128 59.20 232 133 59.25 235 139 59.30 237 144 59.35 240 150 59.40 243 155 59.45 246 161 59.50 249 167 59.55 251 172 59.60 254 178 59.65 257 183 59.70 260 189 59.75 263 194 59.80 266 200 59.85 268 205 59.90 271 211 59.95 274 217 60.00 277 222 60.05 280 228 60.10 282 233 60.15 285 239 60.20 288 244 60.25 291 250 60.30 294 255 60.35 296 261 60.40 299 267 60.45 302 272 60.50 305 278 60.55 308 283 Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 60.60 311 289 60.65 313 294 60.70 316 300 60.75 319 305 60.80 322 311 60.85 325 316 60.90 327 322 60.95 330 328 61.00 333 333 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 117HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Inflow Area = 0.422 ac, 0.00% Impervious, Inflow Depth = 1.58" for 100-Year event Inflow = 0.61 cfs @ 12.11 hrs, Volume= 0.056 af Outflow = 0.11 cfs @ 12.91 hrs, Volume= 0.056 af, Atten= 82%, Lag= 48.3 min Discarded = 0.11 cfs @ 12.91 hrs, Volume= 0.056 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 48.41' @ 12.91 hrs Surf.Area= 313 sf Storage= 626 cf Plug-Flow detention time= 53.8 min calculated for 0.056 af (100% of inflow) Center-of-Mass det. time= 53.8 min ( 949.8 - 896.0 ) Volume Invert Avail.Storage Storage Description #1 45.50' 240 cf 8.25'W x 37.90'L x 3.00'H Prismatoid 938 cf Overall - 405 cf Embedded = 533 cf x 45.0% Voids #2 45.50' 405 cf 4.25'W x 7.95'L x 3.00'H Prismatoid x 4 Inside #1 645 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 45.50'8.270 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.11 cfs @ 12.91 hrs HW=48.41' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.11 cfs) Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Inflow Discarded Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.422 ac Peak Elev=48.41' Storage=626 cf 0.61 cfs 0.11 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 118HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Discarded Stage-Discharge Discharge (cfs) 0.110.10.090.080.070.060.050.040.030.020.010 El e v a t i o n ( f e e t ) 48 47 46 Exfiltration Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Wetted Storage Stage-Area-Storage Storage (cubic-feet) 600550500450400350300250200150100500 Surface/Horizontal/Wetted Area (sq-ft) 550500450400350300250200150100500 El e v a t i o n ( f e e t ) 48 47 46 Prismatoid + Prismatoid Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 119HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0 45.50 0.00 0.50 0.00 0 45.50 0.00 1.00 0.00 0 45.50 0.00 1.50 0.00 0 45.50 0.00 2.00 0.00 0 45.50 0.00 2.50 0.00 0 45.50 0.00 3.00 0.00 0 45.50 0.00 3.50 0.00 0 45.50 0.00 4.00 0.00 0 45.50 0.00 4.50 0.00 0 45.50 0.00 5.00 0.00 0 45.50 0.00 5.50 0.00 0 45.50 0.00 6.00 0.00 0 45.50 0.00 6.50 0.00 0 45.50 0.00 7.00 0.00 0 45.50 0.00 7.50 0.00 0 45.50 0.00 8.00 0.00 0 45.50 0.00 8.50 0.00 0 45.50 0.00 9.00 0.00 0 45.50 0.00 9.50 0.00 0 45.50 0.00 10.00 0.00 0 45.50 0.00 10.50 0.00 0 45.50 0.00 11.00 0.00 0 45.50 0.00 11.50 0.00 0 45.50 0.00 12.00 0.22 24 45.61 0.06 12.50 0.23 581 48.20 0.11 13.00 0.10 624 48.40 0.11 13.50 0.08 590 48.24 0.11 14.00 0.07 540 48.01 0.10 14.50 0.06 478 47.72 0.10 15.00 0.06 413 47.42 0.09 15.50 0.05 346 47.11 0.09 16.00 0.04 275 46.78 0.08 16.50 0.04 203 46.44 0.08 17.00 0.03 135 46.13 0.07 17.50 0.03 70 45.83 0.07 18.00 0.03 8 45.54 0.06 18.50 0.03 1 45.50 0.03 19.00 0.02 1 45.50 0.02 19.50 0.02 1 45.50 0.02 20.00 0.02 1 45.50 0.02 20.50 0.02 1 45.50 0.02 21.00 0.02 1 45.50 0.02 21.50 0.02 1 45.50 0.02 22.00 0.02 1 45.50 0.02 22.50 0.02 1 45.50 0.02 23.00 0.02 1 45.50 0.02 23.50 0.02 1 45.50 0.02 24.00 0.02 1 45.50 0.02 24.50 0.00 0 45.50 0.00 25.00 0.00 0 45.50 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 120HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Discarded (cfs) 45.50 0.00 45.52 0.06 45.54 0.06 45.56 0.06 45.58 0.06 45.60 0.06 45.62 0.06 45.64 0.06 45.66 0.06 45.68 0.06 45.70 0.06 45.72 0.06 45.74 0.06 45.76 0.06 45.78 0.06 45.80 0.07 45.82 0.07 45.84 0.07 45.86 0.07 45.88 0.07 45.90 0.07 45.92 0.07 45.94 0.07 45.96 0.07 45.98 0.07 46.00 0.07 46.02 0.07 46.04 0.07 46.06 0.07 46.08 0.07 46.10 0.07 46.12 0.07 46.14 0.07 46.16 0.07 46.18 0.07 46.20 0.07 46.22 0.07 46.24 0.07 46.26 0.07 46.28 0.07 46.30 0.07 46.32 0.07 46.34 0.07 46.36 0.08 46.38 0.08 46.40 0.08 46.42 0.08 46.44 0.08 46.46 0.08 46.48 0.08 46.50 0.08 46.52 0.08 Elevation (feet) Discarded (cfs) 46.54 0.08 46.56 0.08 46.58 0.08 46.60 0.08 46.62 0.08 46.64 0.08 46.66 0.08 46.68 0.08 46.70 0.08 46.72 0.08 46.74 0.08 46.76 0.08 46.78 0.08 46.80 0.08 46.82 0.08 46.84 0.08 46.86 0.08 46.88 0.08 46.90 0.08 46.92 0.08 46.94 0.09 46.96 0.09 46.98 0.09 47.00 0.09 47.02 0.09 47.04 0.09 47.06 0.09 47.08 0.09 47.10 0.09 47.12 0.09 47.14 0.09 47.16 0.09 47.18 0.09 47.20 0.09 47.22 0.09 47.24 0.09 47.26 0.09 47.28 0.09 47.30 0.09 47.32 0.09 47.34 0.09 47.36 0.09 47.38 0.09 47.40 0.09 47.42 0.09 47.44 0.09 47.46 0.09 47.48 0.09 47.50 0.10 47.52 0.10 47.54 0.10 47.56 0.10 Elevation (feet) Discarded (cfs) 47.58 0.10 47.60 0.10 47.62 0.10 47.64 0.10 47.66 0.10 47.68 0.10 47.70 0.10 47.72 0.10 47.74 0.10 47.76 0.10 47.78 0.10 47.80 0.10 47.82 0.10 47.84 0.10 47.86 0.10 47.88 0.10 47.90 0.10 47.92 0.10 47.94 0.10 47.96 0.10 47.98 0.10 48.00 0.10 48.02 0.10 48.04 0.10 48.06 0.11 48.08 0.11 48.10 0.11 48.12 0.11 48.14 0.11 48.16 0.11 48.18 0.11 48.20 0.11 48.22 0.11 48.24 0.11 48.26 0.11 48.28 0.11 48.30 0.11 48.32 0.11 48.34 0.11 48.36 0.11 48.38 0.11 48.40 0.11 48.42 0.11 48.44 0.11 48.46 0.11 48.48 0.11 48.50 0.11 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 121HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 2P: One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 45.50 313 0 45.55 317 11 45.60 322 22 45.65 327 32 45.70 331 43 45.75 336 54 45.80 340 65 45.85 345 75 45.90 350 86 45.95 354 97 46.00 359 108 46.05 363 118 46.10 368 129 46.15 373 140 46.20 377 151 46.25 382 161 46.30 387 172 46.35 391 183 46.40 396 194 46.45 400 204 46.50 405 215 46.55 410 226 46.60 414 237 46.65 419 247 46.70 423 258 46.75 428 269 46.80 433 280 46.85 437 290 46.90 442 301 46.95 447 312 47.00 451 323 47.05 456 333 47.10 460 344 47.15 465 355 47.20 470 366 47.25 474 376 47.30 479 387 47.35 483 398 47.40 488 409 47.45 493 419 47.50 497 430 47.55 502 441 47.60 507 452 47.65 511 462 47.70 516 473 47.75 520 484 47.80 525 495 47.85 530 505 47.90 534 516 47.95 539 527 48.00 543 538 48.05 548 548 Elevation (feet) Wetted (sq-ft) Storage (cubic-feet) 48.10 553 559 48.15 557 570 48.20 562 581 48.25 567 591 48.30 571 602 48.35 576 613 48.40 580 624 48.45 585 634 48.50 590 645 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 122HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond CB1: Roof Leader - 6" ADS Pipe Inflow Area = 0.027 ac,100.00% Impervious, Inflow Depth = 8.26" for 100-Year event Inflow = 0.23 cfs @ 12.08 hrs, Volume= 0.019 af Outflow = 0.23 cfs @ 12.08 hrs, Volume= 0.019 af, Atten= 0%, Lag= 0.0 min Primary = 0.23 cfs @ 12.08 hrs, Volume= 0.019 af Routed to Pond 1P : One (1) 19.98' x 8.25' x 3' Stormtech Leach Chamber System Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 63.23' @ 12.08 hrs Device Routing Invert Outlet Devices #1 Primary 63.00'6.0" Round Culvert X 2.00 L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 63.00' / 61.00' S= 0.0667 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.20 sf Primary OutFlow Max=0.23 cfs @ 12.08 hrs HW=63.23' TW=58.93' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.23 cfs @ 1.29 fps) Pond CB1: Roof Leader - 6" ADS Pipe Inflow Primary Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=0.027 ac Peak Elev=63.23' 6.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0667 '/' 0.23 cfs 0.23 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 123HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond CB1: Roof Leader - 6" ADS Pipe Primary Stage-Discharge Discharge (cfs) 0.70.650.60.550.50.450.40.350.30.250.20.150.10.050 El e v a t i o n ( f e e t ) 63.5 63.48 63.46 63.44 63.42 63.4 63.38 63.36 63.34 63.32 63.3 63.28 63.26 63.24 63.22 63.2 63.18 63.16 63.14 63.12 63.1 63.08 63.06 63.04 63.02 63 Culvert Pond CB1: Roof Leader - 6" ADS Pipe Storage Stage-Area-Storage Storage (acre-feet) 0 El e v a t i o n ( f e e t ) 63.5 63.48 63.46 63.44 63.42 63.4 63.38 63.36 63.34 63.32 63.3 63.28 63.26 63.24 63.22 63.2 63.18 63.16 63.14 63.12 63.1 63.08 63.06 63.04 63.02 63 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 124HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond CB1: Roof Leader - 6" ADS Pipe Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 63.00 0.00 0.50 0.00 63.00 0.00 1.00 0.00 63.01 0.00 1.50 0.00 63.01 0.00 2.00 0.00 63.02 0.00 2.50 0.00 63.02 0.00 3.00 0.00 63.02 0.00 3.50 0.00 63.02 0.00 4.00 0.00 63.02 0.00 4.50 0.00 63.02 0.00 5.00 0.00 63.02 0.00 5.50 0.00 63.03 0.00 6.00 0.00 63.03 0.00 6.50 0.00 63.03 0.00 7.00 0.00 63.03 0.00 7.50 0.01 63.03 0.01 8.00 0.01 63.03 0.01 8.50 0.01 63.04 0.01 9.00 0.01 63.04 0.01 9.50 0.01 63.04 0.01 10.00 0.01 63.05 0.01 10.50 0.01 63.05 0.01 11.00 0.02 63.06 0.02 11.50 0.03 63.07 0.03 12.00 0.14 63.18 0.14 12.50 0.05 63.10 0.05 13.00 0.02 63.06 0.02 13.50 0.01 63.05 0.01 14.00 0.01 63.05 0.01 14.50 0.01 63.05 0.01 15.00 0.01 63.04 0.01 15.50 0.01 63.04 0.01 16.00 0.01 63.04 0.01 16.50 0.01 63.03 0.01 17.00 0.00 63.03 0.00 17.50 0.00 63.03 0.00 18.00 0.00 63.03 0.00 18.50 0.00 63.03 0.00 19.00 0.00 63.03 0.00 19.50 0.00 63.03 0.00 20.00 0.00 63.02 0.00 20.50 0.00 63.02 0.00 21.00 0.00 63.02 0.00 21.50 0.00 63.02 0.00 22.00 0.00 63.02 0.00 22.50 0.00 63.02 0.00 23.00 0.00 63.02 0.00 23.50 0.00 63.02 0.00 24.00 0.00 63.02 0.00 24.50 0.00 63.00 0.00 25.00 0.00 63.00 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 125HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond CB1: Roof Leader - 6" ADS Pipe Elevation (feet) Primary (cfs) 63.00 0.00 63.01 0.00 63.02 0.00 63.03 0.00 63.04 0.01 63.05 0.01 63.06 0.02 63.07 0.02 63.08 0.03 63.09 0.04 63.10 0.05 63.11 0.06 63.12 0.07 63.13 0.08 63.14 0.09 63.15 0.10 63.16 0.12 63.17 0.13 63.18 0.15 63.19 0.16 63.20 0.18 63.21 0.19 63.22 0.21 63.23 0.23 63.24 0.25 63.25 0.26 63.26 0.28 63.27 0.30 63.28 0.32 63.29 0.34 63.30 0.36 63.31 0.38 63.32 0.40 63.33 0.42 63.34 0.45 63.35 0.47 63.36 0.49 63.37 0.51 63.38 0.53 63.39 0.55 63.40 0.57 63.41 0.59 63.42 0.61 63.43 0.63 63.44 0.65 63.45 0.67 63.46 0.69 63.47 0.71 63.48 0.72 63.49 0.74 63.50 0.75 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 126HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond CB1: Roof Leader - 6" ADS Pipe Elevation (feet) Storage (acre-feet) 63.00 0.000 63.01 0.000 63.02 0.000 63.03 0.000 63.04 0.000 63.05 0.000 63.06 0.000 63.07 0.000 63.08 0.000 63.09 0.000 63.10 0.000 63.11 0.000 63.12 0.000 63.13 0.000 63.14 0.000 63.15 0.000 63.16 0.000 63.17 0.000 63.18 0.000 63.19 0.000 63.20 0.000 63.21 0.000 63.22 0.000 63.23 0.000 63.24 0.000 63.25 0.000 63.26 0.000 63.27 0.000 63.28 0.000 63.29 0.000 63.30 0.000 63.31 0.000 63.32 0.000 63.33 0.000 63.34 0.000 63.35 0.000 63.36 0.000 63.37 0.000 63.38 0.000 63.39 0.000 63.40 0.000 63.41 0.000 63.42 0.000 63.43 0.000 63.44 0.000 63.45 0.000 63.46 0.000 63.47 0.000 63.48 0.000 63.49 0.000 63.50 0.000 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 127HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond CB2: Catch Basin At Lower Driveway Inflow Area = 0.422 ac, 0.00% Impervious, Inflow Depth = 1.58" for 100-Year event Inflow = 0.61 cfs @ 12.11 hrs, Volume= 0.056 af Outflow = 0.61 cfs @ 12.11 hrs, Volume= 0.056 af, Atten= 0%, Lag= 0.0 min Primary = 0.61 cfs @ 12.11 hrs, Volume= 0.056 af Routed to Pond 2P : One (1) 37.9' x 8.25' x 3' Stormtech Leach Chamber System Routing by Dyn-Stor-Ind method, Time Span= 0.00-25.00 hrs, dt= 0.01 hrs Peak Elev= 49.48' @ 12.11 hrs Device Routing Invert Outlet Devices #1 Primary 49.00'12.0" Round Catch Basin L= 50.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 49.00' / 48.50' S= 0.0100 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.61 cfs @ 12.11 hrs HW=49.48' TW=46.31' (Dynamic Tailwater) 1=Catch Basin (Barrel Controls 0.61 cfs @ 2.39 fps) Pond CB2: Catch Basin At Lower Driveway Inflow Primary Hydrograph Time (hours) 252423222120191817161514131211109876543210 Fl o w ( c f s ) 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.422 ac Peak Elev=49.48' 12.0" Round Culvert n=0.020 L=50.0' S=0.0100 '/' 0.61 cfs 0.61 cfs Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 128HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond CB2: Catch Basin At Lower Driveway Primary Stage-Discharge Discharge (cfs) 210 El e v a t i o n ( f e e t ) 50 49 Catch Basin Pond CB2: Catch Basin At Lower Driveway Storage Stage-Area-Storage Storage (acre-feet) 0 El e v a t i o n ( f e e t ) 50 49 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 129HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond CB2: Catch Basin At Lower Driveway Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 49.00 0.00 0.50 0.00 49.00 0.00 1.00 0.00 49.00 0.00 1.50 0.00 49.00 0.00 2.00 0.00 49.00 0.00 2.50 0.00 49.00 0.00 3.00 0.00 49.00 0.00 3.50 0.00 49.00 0.00 4.00 0.00 49.00 0.00 4.50 0.00 49.00 0.00 5.00 0.00 49.00 0.00 5.50 0.00 49.00 0.00 6.00 0.00 49.00 0.00 6.50 0.00 49.00 0.00 7.00 0.00 49.00 0.00 7.50 0.00 49.00 0.00 8.00 0.00 49.00 0.00 8.50 0.00 49.00 0.00 9.00 0.00 49.00 0.00 9.50 0.00 49.00 0.00 10.00 0.00 49.00 0.00 10.50 0.00 49.00 0.00 11.00 0.00 49.00 0.00 11.50 0.00 49.00 0.00 12.00 0.22 49.28 0.22 12.50 0.23 49.29 0.23 13.00 0.10 49.19 0.10 13.50 0.08 49.18 0.08 14.00 0.07 49.16 0.07 14.50 0.06 49.15 0.06 15.00 0.06 49.15 0.06 15.50 0.05 49.14 0.05 16.00 0.04 49.13 0.04 16.50 0.04 49.12 0.04 17.00 0.03 49.11 0.03 17.50 0.03 49.11 0.03 18.00 0.03 49.10 0.03 18.50 0.03 49.10 0.03 19.00 0.02 49.10 0.02 19.50 0.02 49.09 0.02 20.00 0.02 49.09 0.02 20.50 0.02 49.09 0.02 21.00 0.02 49.09 0.02 21.50 0.02 49.09 0.02 22.00 0.02 49.09 0.02 22.50 0.02 49.08 0.02 23.00 0.02 49.08 0.02 23.50 0.02 49.08 0.02 24.00 0.02 49.08 0.02 24.50 0.00 49.00 0.00 25.00 0.00 49.00 0.00 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 130HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Discharge for Pond CB2: Catch Basin At Lower Driveway Elevation (feet) Primary (cfs) 49.00 0.00 49.01 0.00 49.02 0.00 49.03 0.00 49.04 0.00 49.05 0.01 49.06 0.01 49.07 0.01 49.08 0.02 49.09 0.02 49.10 0.03 49.11 0.03 49.12 0.04 49.13 0.05 49.14 0.05 49.15 0.06 49.16 0.07 49.17 0.08 49.18 0.09 49.19 0.10 49.20 0.11 49.21 0.12 49.22 0.13 49.23 0.15 49.24 0.16 49.25 0.17 49.26 0.19 49.27 0.20 49.28 0.22 49.29 0.23 49.30 0.25 49.31 0.27 49.32 0.28 49.33 0.30 49.34 0.32 49.35 0.34 49.36 0.35 49.37 0.37 49.38 0.39 49.39 0.41 49.40 0.43 49.41 0.45 49.42 0.48 49.43 0.50 49.44 0.52 49.45 0.54 49.46 0.56 49.47 0.59 49.48 0.61 49.49 0.63 49.50 0.66 49.51 0.68 Elevation (feet) Primary (cfs) 49.52 0.70 49.53 0.73 49.54 0.75 49.55 0.78 49.56 0.80 49.57 0.83 49.58 0.85 49.59 0.88 49.60 0.91 49.61 0.93 49.62 0.96 49.63 0.99 49.64 1.01 49.65 1.04 49.66 1.07 49.67 1.09 49.68 1.12 49.69 1.15 49.70 1.18 49.71 1.21 49.72 1.23 49.73 1.26 49.74 1.29 49.75 1.32 49.76 1.35 49.77 1.37 49.78 1.40 49.79 1.43 49.80 1.46 49.81 1.49 49.82 1.51 49.83 1.54 49.84 1.57 49.85 1.60 49.86 1.63 49.87 1.66 49.88 1.68 49.89 1.71 49.90 1.74 49.91 1.77 49.92 1.79 49.93 1.82 49.94 1.85 49.95 1.87 49.96 1.90 49.97 1.93 49.98 1.95 49.99 1.98 50.00 2.01 Type III 24-hr 100-Year Rainfall=8.50"9364.MULLIN - TUBMAN ROAD - VACANT LOT Printed 1/24/2023Prepared by J M O'Reilly & Associates Inc Page 131HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond CB2: Catch Basin At Lower Driveway Elevation (feet) Storage (acre-feet) 49.00 0.000 49.01 0.000 49.02 0.000 49.03 0.000 49.04 0.000 49.05 0.000 49.06 0.000 49.07 0.000 49.08 0.000 49.09 0.000 49.10 0.000 49.11 0.000 49.12 0.000 49.13 0.000 49.14 0.000 49.15 0.000 49.16 0.000 49.17 0.000 49.18 0.000 49.19 0.000 49.20 0.000 49.21 0.000 49.22 0.000 49.23 0.000 49.24 0.000 49.25 0.000 49.26 0.000 49.27 0.000 49.28 0.000 49.29 0.000 49.30 0.000 49.31 0.000 49.32 0.000 49.33 0.000 49.34 0.000 49.35 0.000 49.36 0.000 49.37 0.000 49.38 0.000 49.39 0.000 49.40 0.000 49.41 0.000 49.42 0.000 49.43 0.000 49.44 0.000 49.45 0.000 49.46 0.000 49.47 0.000 49.48 0.000 49.49 0.000 49.50 0.000 49.51 0.000 Elevation (feet) Storage (acre-feet) 49.52 0.000 49.53 0.000 49.54 0.000 49.55 0.000 49.56 0.000 49.57 0.000 49.58 0.000 49.59 0.000 49.60 0.000 49.61 0.000 49.62 0.000 49.63 0.000 49.64 0.000 49.65 0.000 49.66 0.000 49.67 0.000 49.68 0.000 49.69 0.000 49.70 0.000 49.71 0.000 49.72 0.000 49.73 0.000 49.74 0.000 49.75 0.000 49.76 0.000 49.77 0.000 49.78 0.000 49.79 0.000 49.80 0.000 49.81 0.000 49.82 0.000 49.83 0.000 49.84 0.000 49.85 0.000 49.86 0.000 49.87 0.000 49.88 0.000 49.89 0.000 49.90 0.000 49.91 0.000 49.92 0.000 49.93 0.000 49.94 0.000 49.95 0.000 49.96 0.000 49.97 0.000 49.98 0.000 49.99 0.000 50.00 0.000