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HomeMy Public PortalAboutStormwater Report_2013_01_14_201301281541047308 STORMWATER REPORT 45 BACON STREET WATERTOWN, MASSACHUSETTS Sµ OF M,�ss ctiG MATT HEW J. DiSTEFANO L) CIVIL -0 9No.4 5E / 9�cF T January 7, 2013 Prepared by: VTP Associates, Inc. 132 Adams Street 2nd Floor, Suite 3 Newton Massachusetts 02465 1-617-332-8271 Job # 212190 INTRODUCTION VTP Associates has performed a stormwater management analysis to evaluate the post-development impacts created by the proposed residence at#45 Bacon Street in Watertown,Massachusetts.The project will include a new residence building with approximately 41 units,underground parking, a surface driveway and parking, landscaped areas, and an associated stormwater management system. VTP Associates analyzed the hydrology for the drainage areas impacted by the proposed work utilizing the Soil Conservation Service's (SCS) Runoff Curve Number (CN) methodology. VTP Associates used the HydroCAD computer modeling system in conjunction with the SCS's methods to determine the peak rate of runoff for the 2, 10, and 100-year storm events. VTP Associates proposes the use of best management practices (BMPs) as defined by the Massachusetts Department of Environmental Protection(MA DEP)for stormwater management onsite to protect downstream receiving waters from adverse water quality impacts due to stormwater runoff. Mitigating the rate and quality of stormwater runoff from the project site will also help to lessen the environmental impact of the proposed development. METHODOLOGY Hydrology and Hydraulics VTP Associates analyzed the survey base plan and conducted a site visit to determine the existing drainage flow patterns onsite. The existing conditions survey,in conjunction with aerial photography, and site visits were used to determine existing surface coverage areas for the site.VTP Associates determined that a majority of the pre-developed surface cover for the study area is pervious cover.The balance of the study area consists mainly of a lightly wooded area.Initial soil research was determined using the Natural Resources Conservation Service(MRCS)soil survey maps for Middlesex County,Massachusetts via Web Soil Survey 1.1.According to the soil survey,the soil on the site consists of the following: 602: Urban Land Soil borings were conducted and determined that the site consists of well draining sand. Based upon these findings,VTP Associates used a Hydrologic soil group `A' for its drainage calculations. For each subcatchment area,VTP Associates determined drainage flow path lengths, surface cover type and slopes for sheet and shallow concentrated flow. The information was used to calculate the time of concentration(Tc)for each subcatchment areas. Where applicable,a minimum Tc of 5 minutes was used;the minimum value for highly developed,small catchment areas. SCS Runoff Curve Numbers were selected by using the cover type and hydrologic soil group of each area. The peak runoff rates for the 2, 10 and 100-year storm events were then determined by inputting the weighted CN, Tc, drainage areas, and drainage system information into the HydroCAD storm water modeling system computer program. The storm events were based on the 24-hour duration storm with a SCS Type III storm distribution curve. Storm Event VTP Associates used Massachusetts rainfall data maps from Technical Paper 40,Rainfall Frequency Atlas of the United States and the City of Newton's Requirements for On-Site Drainage to estimate the rainfall depth for the 2-, 10-and 100-year storms. The rainfall depths for the 24-hour storm events used are as follows: Stormwater Report for#45 Bacon Street Page 1 Storm Event 24-Hour Rainfall Denth(inches) 2-year 3.1 10-year 4.5 100-year 6.5 HYDROLOGICAL ANALYSIS Pre-Development Conditions The proposed residency is to be located at#45 Bacon Street in Watertown,Massachusetts. The existing site consists of a two-story brick warehouse,a one-story wood building, and a one story concrete block building. All three building were formerly used for a commercial manufacturing plant. The remainder of the site is covered with degraded asphalt and woods and grass with poor ground cover.Approximately 68%of the site is impervious cover.The site is bound by homes to the north and south,Howard Street to the west,Bacon Street to the east, and a commercial building to the southwest. VTP Associates compiled the existing drainage areas from an existing conditions survey prepared by VTP Associates.Additionally,VTP Associates conducted site visits to evaluate the existing onsite drainage patterns and watershed divides from the existing conditions survey. At present, stormwater runoff from the existing study area drains to Bacon Street to the east, Howard Street to the west, and the commercial abutter to the southwest.The pre-development drainage areas are shown on"Figure 1:Pre-Development Drainage Areas." Post Development Conditions The proposed project includes the construction of a new multi-family residence, consisting of 41 units, underground parking,surface driveway with parking,landscaped areas,and associated drainage improvements. As a result, the proposed site will decrease the impervious cover by approximately 1,350 square feet and significantly improve the pervious area on site.The same overall area was analyzed for the proposed conditions as the pre-development conditions and is shown on"Figure 2:Post-Development Drainage Areas."Similar to pre-development conditions,the stormwater runoff flows in the same direction. The same design points were used as in the pre-development conditions. The new residence will have approximately 18,029 square feet of impervious,or roof,surface.The roof runoff area will be collected by roof leaders and discharged into the onsite underground infiltration systems. The intent of the proposed stormwater management system is to infiltrate the clean roof runoff from the proposed home. The roof runoff areas are separated into four drainage areas and discharge to a respective underground infiltration system. The systems have been designed to provide adequate groundwater recharge capacity. Calculations outlining the requirement and capacity have been attached to this report.Infiltration systems 1,2, &3 are also designed to help mitigate proposed peak rates of runoff to less than existing conditions. Outlet devices have been designed for the three systems and can be seen on the construction documents.Infiltration system#2 was designed to collect a portion of the roof and the runoff area from the southern plaza.Infiltration system #4 was designed to collect a portion of the roof runoff, the northern plaza and the runoff from the surface driveway area. Infiltration system#4 was designed to fully infiltrate runoff from the I00-year storm event. The remainder of the site's runoff can be seen on"Figure 2: Post-Development Drainage Areas." The proposed construction will decrease the amount of impervious area from pre-development conditions, improve pervious site cover, decrease the amount of surface parking, and control the peak rates of runoff to pre-development levels. Stormwater Report for#45 Bacon Street Page 2 Soil borings were performed and determined the on-site soil is Class`A' sand.The soil boring information has been included within this report.Groundwater was found to be approximately 25-feet below surface.There is sufficient soil information to design the infiltration systems and all infiltration systems are designed to be more than two feet above groundwater.As per the Mass DEP Stormwater Hydrology Handbook for Conservation Commissions,VTP used a design infiltration rate of 8.27 in/hr for`A' soils. VTP Associates analyzed the pre-and post-development site conditions to determine the peak rates of runoff at the design points. By incorporating the stormwater management features discussed above,the peak rates of runoff in the post-development condition is to be better than pre-development levels. Pre-development peak runoff rates vs.post-development peak runoff rates for the 2, 10,and 100-year storm events are presented in Table 1 below. Table 1,Pre-development vs.Post-Development Peak Rate of Runoff Design Point#1 —Howard Street STORM EVENT PRE-DEVELOPMENT PEAK POST-DEVELOPMENT PEAK (DESIGN POINT) RATE OF R UNOFF(CFS) RATE OF R UNOFF(CFS) 1 2-YEAR 1.94 0.29 10-YEAR 3.16 1.50 100-YEAR 4.89 2.20 Design Point#2—Bacon Street STORM EVENT PRE-DEVELOPMENT PEAK POST-DEVELOPMENT PEAK (DESIGN POINT) RATE OF R UNOFF(CFS) RATE OF RUNOFF(CFS) 1 2-YEAR 0.50 0.10 10-YEAR 0.93 0.32 100-YEAR 1.60 1.16 Design Point#3 —Commercial Abutter STORM EVENT PRE-DEVELOPMENT PEAK POST-DEVELOPMENT PEAK (DESIGN POINT) RATE OF R UNOFF(CFS) RATE OF RUNOFF(CFS) 1 2-YEAR 0.09 0.01 10-YEAR 0.20 0.03 100-YEAR 0.36 0.09 Groundwater Recharge Since the project is a re-development,VTP has designed the proposed stormwater management system to the maximum extent practicable.The proposed site will have a decrease in the overall amount of impervious area by approximately 1,530 square feet.Therefore,annual recharge from the post-development site will be greater than the annual recharge from pre-development conditions.Moreover,the proposed infiltration systems will add an additional 3,668 cubic feet of available storage for recharge. The systems have been designed to infiltrate a minimum of 0.6-inches of runoff over the total contributing impervious area,which includes the entire proposed roof. The breakdown of each infiltration system's available storage along with drawdown calculations can be seen in the attached documents at the end of this report. Stormwater Report for#45 Bacon Street Page 3 CONCLUSION The post-development peak rates of runoff is expected to be less than or equal to pre-development levels for the 2, 10,and 100-year storm events.The factors attributing to the proposed stormwater mitigation include a decrease in impervious ground coverage,the addition of four underground infiltration systems,and improved surface cover conditions ENCLOSURES Soils Boring Logs NRCS Soil Map Pre-Development Drainage Map Pre-Development HydroCAD Calculations Post-Development Drainage Map Post-Development HydroCAD Calculations Recharge Volume Table Recharge Drawdown Calculations TSS Removal Calculations Stormwater Report for#45 Bacon Street Page 4 ATTACHMENT A BORING LOGS a ZO * Q141 A4 A �3[ yr � +Y(.. t� •h�. T r' � .i��� ?`f��' f! ., 3 UST BEDS',,, {° s w 1 �.�,,._ _ 'war ,, ...:.. A�+w�-'',.t �„ a� -"7`.2' '�4' ��•y� :�'� :� - ! �'.t,4`�� ,�..p,.,. 'Z��E' y n ry 'Z t'tt� i f -.< �..af •-' } z,J ,- .'s°` t:3'"3 ,�' a �#.,.. �•L.`b , +Y. "'., �'' 3J,Cky.'fix• k:�{4 ,R, .,y,y.+r .} y -s�'�r' Lx a -Vwn ; • • • 11' • • • • •• •• �•,• M 0 Clean Properties, Inc. I 1 I Boston Post Road,Suite 211 Sudbury,MA 01776 978 4-43-i622 I�5 BACQ i\1 a l r $?0 G Ground Elevation: GROUNDWATER OBSERVATIONS Date Started: p, ,o- DATE DEPTH I CASING STABILIZA'CION Date Finished: Driller: Cuu`i Soil En-ineer/Geologist: F_J,J PAPS' Depth PID Sample Visual Identification Ft_ ppm No. ' P—R- Depth Blows/6" Strata of Soil and/or Rock Sample -Cop to ` L-r br DUjri tr a.S� n0 SO 6 Top 13 " -- � r bro'U', Vf- SA�Jo TILL aoT am �S" LT-brown SILT, Ilrrle, = m-C Sated Tr ' ( r-r12 r 0, G` i'c v rye n-S rr , i Y j-11 C •t v� — =A'�,� Tor brot'.,11 �Q,T 0�-i b pT'ffl� Cp � oPIZ9 i3 RvSAi. Ate 7 T LL sc d1)LAP, pr_Nro�); ,: I r. a1ZN 1 . 4c O 5 LR CG1-i L;---)-Fs> Uj i D S -T COWCt-_TF— s ;�_1)L �1>ro �?L'vM �a�;tiL vsN Z+ti�s i` cP+� Q ~II f�SuRt.IG "� -7t1 G�,�s,o Sv1� 014.9 Cohesionless: 0-4 V Loose, 4-10 Loose, Trace 0 to 10% CASING SAMPLE CORE TYPE 10-30 M Dense, 30 SO Dense, 50+V Dense. Little 10 to 20% ID SIZE(IN) Cohesive: 0-2 V SoR, 2-4 Soft, 4-8 M Stiff Some 20 to 35% HAMMER WGT(LB) 8-15 Stiff, 15-30 V.Stiff, 30+Hard. And 35%to 50% HAMMER FALL(IN) Clean Properties, Inc. s,� I I I Boston Post Road,Suite 2 11 ^{ }�'•_� `� Sudbury,MA 01776 _ 978 443-6622 :CC `11 Groupd Elevation: I GROUNDWATER OBSERVATIONS Date Started: I o- jp- t, DATI; DEPTH CASING STABILIZATION Date Finished: I` o` _ _ (�0-10 Ifo-q$ Driller: Soil -�n�aneer'Geolo Depth PID Sample Visual Identification Ft PPM No. P—Rcc Depth Blowsi6" Strata of Soil and/or Rock Sample 3` 1 : j 12A C*� r- (?j_ rAy � fion� 1•er, C T,�' _r G{0 sn StLI $cr .r ,fir FZ-,)SF)L- fi r 'l-r C)i aF- 'h Cfj fjf;? (;Cj4F-C) Lo, C�, c,C{� ---4 `. 1 `� ° '' �L1 r� , HYDRAjFy7 6RArIvrhR B ✓TOr,i1To 17T, or-j;�—SANt3 TO 0.S $T. CottLF- rb w/a cotjCP-,fJT- SIRFA(:E S:bL A.40 ALum)wuM FLV5H- NOUO- RoADDoY, lfA(;:vRiNG L41' X -7 , To7AL PE-Prn BF-Low GKPjNz S*,FAz. IS D,y-$Fr Cohesionless: 0-4 V.Loose, 4-10 Loose, Trace 0 to 10% CASING SAMPLE CORE TYPE 10-30 M Dense, 30-50 Dense, 50+V Dense. Little 10 to 20% ID SIZE(IN) Cohesive: 0-2 V Soft, 2-4 Soft, 4-8 M Stiff Some 20 to 35% HAMMER WGT(1,13) 8-15Stiff, 15-30V.Stiff, 30+Hard. And 35%to50% HAIJM�RFALI�f�IN) .: M-- Clean Properties,Inc. 4 4-7 O AC-C K) S 1 Cf'` I I I Boston Post Road,Suite 211 MA tp, U S l Sudbury,MA 01776 978 443-6622 �x C R VA T1 O r Ground Elevation: GROUNDWATER OBSERVATIONS Date Started: 10 DATE DEPTH CASING STABILIZATION Date Finished: j(} 0-10 ��• g$ Driller: pc,NNy 1_�G R, yO,i X i Soil -ngineer/Geologist: I JF N P�,AC) 4 Depth PID SampleF/ Visualldentification R. 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III Boston Post Road,Suite 211 s" ; t� S Sudbury,MA 0 1776 978 443-6622 ''J Ground Elevation: GROUNDWATER OBSERVATIONS Date Started: s r I'< = DATE DEPTH CASING STABILIZATION Date Finished: ;;::�- ; t -«. O-1 O I Qa 5 Driller: Soil Engineer/Geologist: ,:= -) Depth PID Sample Visual Identification Ft pPm No Pen/Rcc Depth Blows/6" Strata of Soil and/of Rock Sample j�-1 tt, ..Cl. L5L !.J.%il � `, )t TT LT b(o w, - ? a a,-! J 1i1 15 t-.- `� v :.i t•i ,04 {�" I;l .: b -T t_L_ 'ri L 1 Top:7 140 t' SQ t^r—^Q% SF�aD *t i7DL - q " fAPa I)rowi, LF"S E- �otroa, �tt � �T �•fiown �t I-` 3 0 9 j! i WR,T', LT I�CGtr+n Sr1_I E(:�3e30FT, Q ' -tr4C+,PiA , 5CMEA Flo, 10-SLoT"5'CP- � SET ;0-3oj- , SQwaTo I$+r, 70 r tv Z S11,-D To 0-5fr. Co>•-,NE.-IT'D u,]0.S.T-) Pry 1`�2'v?-+I i"VT 1 �L V SH- 1 is us•! � 0j r1fA 5�rty G '-(" X -7 ti C��u TDraL a�p7iy i3I.pw G$�ouf�A S �RP1+,C IS oZ�f•3 ' Cohesionless: 0-4 V.Loose, 4-10 Loose, rrac- 0 to 10% CASING SAMPLE CORE TYPE 10-30 M Dense, 30-50 Dense, 50+V Dense Ltttle 10 to 20% ID SIZE(IN) Cohesive: 0-2',,'Soft, 2 4 Soft, 4-8 M Stiff Some 20 to 35% HAMMER WGT(LB) 8-15 Stiff, 15-30 V.Stiff, 30+[lard. And 35%to 50% HAMMER FALL(IN) Soil Map—Middlesex County, Massachusetts (45 Bacon Street,Watertown,MA) in 7 M n n 319180 319200 319220 319240 319260 319280 319300 319320 319340 319360 319380 319400 42°22'10" 420 22'10" cto'St N_ N_ M M W O V V O O O O M M W O O M R V T O O W W O O M M m m m co a a 0 0 060ant St M M IL o � o v a 0 0 M M m rn r v a 0 0 N N O O M M m � m � m v 7 0 0 0 0 0 0 M - M m O O V O O CO W m m 42°22'5" � m 42°22'5" v 319180 319200 319220 319240 319260 319280 319300 319320 319340 319360 319380 319400 v v Map Scale:1:1,150 if printed on A size(8.5"x 11")sheet m N Meters n 0 15 30 60 90 I.et 0 50 100 200 300 USDA Natural Resources Web Soil Survey 12/27/2012 Conservation Service National Cooperative Soil Survey Page 1 of 3 Soil Map—Middlesex County, Massachusetts (45 Bacon Street,Watertown, MA) MAP LEGEND MAP INFORMATION Area of Interest(A01) Very Stony Spot Map Scale: 1:1,150 if printed on A size(8.5"X 11")sheet. Area of Interest(AOI) * Wet Spot The soil surveys that comprise your AOI were mapped at 1:25,000. Soils � Other Soil Map Units Warning:Soil Map may not be valid at this scale. Special Point Features Special Line Features Enlargement of maps beyond the scale of mapping can cause _�J Blowout Gully misunderstanding of the detail of mapping and accuracy of soil line Short Steep Slope placement.The maps do not show the small areas of contrasting ® Borrow Pit soils that could have been shown at a more detailed scale. t. Other Clay Spot Political Features Please rely on the bar scale on each map sheet for accurate map ♦ Closed Depression O Cities measurements. { Gravel Pit Water Features Source of Map: Natural Resources Conservation Service Gravelly Spot Streams and Canals Web Soil Survey URL: http://websoilsurvey.nres.usda.gov Coordinate System: UTM Zone 19N NAD83 Landfill Transportation This product is generated from the USDA-NRCS certified data as of A Lava Flow +i+ Rails the version date(s)listed below. 4L Marsh or swamp ow/ Interstate Highways Soil Survey Area: Middlesex County,Massachusetts It Mine or Quarry US Routes Survey Area Data: Version 12, Feb 26,2010 O Miscellaneous Water Major Roads Date(s)aerial images were photographed: 7/10/2003 p Perennial Water Local Roads The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background v Rock Outcrop imagery displayed on these maps.As a result,some minor shifting + Saline Spot of map unit boundaries may be evident. Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip )2r Sodic Spot Spoil Area Q Stony Spot USDA Natural Resources Web Soil Survey 12/27/2012 Conservation Service National Cooperative Soil Survey Page 2 of 3 Soil Map—Middlesex County, Massachusetts 45 Bacon Street,Watertown, MA Map Unit Legend Middlesex County,Massachusetts(MA017) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 602 Urban land 2.7 100.0% Totals for Area of Interest 2.7 100.0% USDA Natural Resources Web Soil Survey 12/27/2012 � Conservation Service National Cooperative Soil Survey Page 3 of 3 SCALE: 1 in.=40ft. DATE: JANUARY 2, 2013 FIGURE 1: PRE—DEVELOPMENT DRAINAGE AREAS ##45 BACON STREET WATERTOWN, MA • � 245]fsL Z N18.3 1'Ec^ 0 woo Q>� CO E1 rly i I STORY , 6 1'52'20"E BL� c0 0.00�', 8a- � � F.FLEL_ao.� o `gl ./ 00 C' In 20.00 J BIIDMINW$ \ 2 STORY .......�„ OFRCE BUILDING 'S2'20 ,GE,,,•,,, 050 89 ' / / 97 14 IL AIWAI i_ Q,� 93 w 90 ) 1 STORY i— / ,4,,.,..... , WOOD ` cl 91, F.FLa..97.17 �N19'52 20 � ".`•' Fo• � s1IEo / 2 STORY BRICK F.FLEL.100.00to M v O 1 ? I= BITUMIN, \ + \\��� 1 I i OnMl�- \ tcc \ C. o \N�\�\ E2 I rn � �N� IBa I \\ \ I� I Z \ Y\ I #35 1T cA \\\�l \1\\` � I C �9 �. ............. - •7 \ 1 I` \ \` ' COL 1r �� BITUMINOUS WL tp• m -/ � r rO \ 1 200.00'mL 9L 1 J ! 4M*01'25"W—�- 9 l�Ja 1 .0 25"W l c .,�, •� „� 1 I D��® ®� _ eAMV sneer E1 E2 E3 Howard Street Bacon Street Abutter Subca Reach and Link Routing Diagram for212190PRE Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydror-ad.net, Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) 212190PRE Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Page 2 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.086 68 <50% Grass cover, Poor, HSG A (E1, E2) 0.076 98 Long Bldg (E1) 0.257 98 Main Bldg (E1) 0.485 98 Pavement (E1, E2, E3) 0.020 98 Small Bldg (E1) 0.315 57 Woods/grass comb., Poor, HSG A (E1, E2, E3) 1.239 85 TOTAL AREA You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190PRE Type /// 24-hr 2-yr Rainfall=3.10" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Page 3 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment E1: Howard Street Runoff = 1.94 cfs @ 12.07 hrs, Volume= 0.129 af, Depth> 1.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 3,325 98 Long Bldg 859 98 Small Bldg 11,194 98 Main Bldg 2,244 68 <50% Grass cover, Poor, HSG A 6,606 57 Woods/grass comb., Poor, HSG A 11,989 98 Pavement 36,217 89 Weighted Average 8,850 24.44% Pervious Area 27,367 75.56% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment E2: Bacon Street Runoff = 0.50 cfs @ 12.08 hrs, Volume= 0.033 af, Depth> 1.22" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 1,481 68 <50% Grass cover, Poor, HSG A 4,982 57 Woods/grass comb., Poor, HSG A 7,554 98 Pavement 14,017 80 Weighted Average 6,463 46.11% Pervious Area 7,554 53.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190PRE Type /// 24-hr 2-yr Rainfall=3.10" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 4 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment El Abutter Runoff = 0.09 cfs @ 12.09 hrs, Volume= 0.006 af, Depth> 0.89" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 2,149 57 Woods/grass comb., Poor, HSG A 1,589 98 Pavement 3,738 74 Weighted Average 2,149 57.49% Pervious Area 1,589 42.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) 212190PRE Type /// 24-hr 10-yr Rainfall=4.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 5 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment E1: Howard Street Runoff = 3.16 cfs @ 12.07 hrs, Volume= 0.215 af, Depth> 3.11" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rainfall=4.50" Area (sf) CN Description 3,325 98 Long Bldg 859 98 Small Bldg 11,194 98 Main Bldg 2,244 68 <50% Grass cover, Poor, HSG A 6,606 57 Woods/grass comb., Poor, HSG A 11,989 98 Pavement 36,217 89 Weighted Average 8,850 24.44% Pervious Area 27,367 75.56% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment E2: Bacon Street Runoff = 0.93 cfs @ 12.08 hrs, Volume= 0.062 af, Depth> 2.29" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rainfall=4.50" Area (sf) CN Description 1,481 68 <50% Grass cover, Poor, HSG A 4,982 57 Woods/grass comb., Poor, HSG A 7,554 98 Pavement 14,017 80 Weighted Average 6,463 46.11% Pervious Area 7,554 53.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190PRE Type /// 24-hr 10-yr Rainfall=4.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 6 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment El Abutter Runoff = 0.20 cfs @ 12.08 hrs, Volume= 0.013 af, Depth> 1.82" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rainfall=4.50" Area (sf) CN Description 2,149 57 Woods/grass comb., Poor, HSG A 1,589 98 Pavement 3,738 74 Weighted Average 2,149 57.49% Pervious Area 1,589 42.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190PRE Type/1/ 24-hr 100-yr Rainfall=6.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 7 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment E1: Howard Street Runoff = 4.89 cfs @ 12.07 hrs, Volume= 0.342 af, Depth> 4.94" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 3,325 98 Long Bldg 859 98 Small Bldg 11,194 98 Main Bldg 2,244 68 <50% Grass cover, Poor, HSG A 6,606 57 Woods/grass comb., Poor, HSG A 11,989 98 Pavement 36,217 89 Weighted Average 8,850 24.44% Pervious Area 27,367 75.56% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment E2: Bacon Street Runoff = 1.60 cfs @ 12.07 hrs, Volume= 0.107 af, Depth> 3.98" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 1,481 68 <50% Grass cover, Poor, HSG A 4,982 57 Woods/grass comb., Poor, HSG A 7,554 98 Pavement 14,017 80 Weighted Average 6,463 46.11% Pervious Area 7,554 53.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190PRE Type/1/ 24-hr 100-yr Rainfall=6.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 8 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment El Abutter Runoff = 0.36 cfs @ 12.08 hrs, Volume= 0.024 af, Depth> 3.37" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 2,149 57 Woods/grass comb., Poor, HSG A 1,589 98 Pavement 3,738 74 Weighted Average 2,149 57.49% Pervious Area 1,589 42.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) SCALE: 1 in.=40ft. FIGURE 2: DATE: JANUARY 2, 2013 1 POST—DEVELOPMENT DRAINAGE AREAS 1 #45 BACON STREET WATERTOWN, MA 1 1 1 �6 1 1 Pi , ST� s CRE O, / I 1 • E h n1 92 • \ � ��. � J � z s oev / ,,,,,,. R1 rn OFl=MuLa 6 I GARAGE J c kp PO EL-89.00 rn / 91 o tK �J STORY oEe a I tQ .EL= 17 cOWN 92 - / 1 31.{4 .�m ll� — I /= co Ul STORY* Li RICK `Oo N PROPOSED F.FL GAR.FL-84.18 00 l � � O cot Lu 00 05 fla l 95 \ ./.,,�„ g5 as,z• {•.e `,a•., of .,ram./ � a•.e•.J s 94 - saxs ' G� Pi R-1 R-3 Howard S eet Roo 1 Roof 3 A Plaza c7 INF-1 INF-3 Infiltration 1 Infiltration 3 N�7 1R Howard Street Subcat Reach Pon Link Routing Diagram for 212190POST-HOWARD STREET Prepared by, Printed 1/14/2013 HydroCADO10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC 212190POST-HOWARD STREET Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Pace 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.141 39 >75% Grass cover, Good, HSG A (P1) 0.059 57 Woods/grass comb., Poor, HSG A (P1) 0.041 98 Plaza (R-3) 0.099 98 Roof 3 (R-3) 0.127 98 Roofs, HSG A (R-1) 0.059 98 Walks (P1) 0.526 78 TOTAL AREA 212190POST-HOWARD STREET Type 111 24-hr 2-yr Rainfall=3.10" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment P1: Howard Street Runoff = 0.03 cfs @ 12.29 hrs, Volume= 0.005 af, Depth> 0.24" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 2,572 98 Walks 2,554 57 Woods/grass comb., Poor, HSG A 6,152 39 >75% Grass cover, Good, HSG A 11,278 57 Weighted Average 8,706 77.19% Pervious Area 2,572 22.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Subcatchment R-1: Roof 1 Runoff = 0.38 cfs @ 12.07 hrs, Volume= 0.028 af, Depth> 2.68" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 5,516 98 Roofs, HSG A 5,516 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment R-3: Roof 3 & Plaza Runoff = 0.42 cfs @ 12.07 hrs, Volume= 0.031 af, Depth> 2.68" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 4,315 98 Roof 3 1,782 98 Plaza 6,097 98 Weighted Average 6,097 100.00% Impervious Area 212190POST-HOWARD STREET Type 111 24-hr 2-yr Rainfall=3.10" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Page 4 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Reach 1 R: Howard Street Inflow Area = 0.526 ac, 61.97% Impervious, Inflow Depth > 0.24" for 2-yr event Inflow = 0.29 cfs @ 12.30 hrs, Volume= 0.011 of Outflow = 0.29 cfs @ 12.30 hrs, Volume= 0.011 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Summary for Pond INF-1: Infiltration 1 Inflow Area = 0.127 ac,100.00% Impervious, Inflow Depth > 2.68" for 2-yr event Inflow = 0.38 cfs @ 12.07 hrs, Volume= 0.028 of Outflow = 0.18 cfs @ 12.31 hrs, Volume= 0.028 af, Atten= 54%, Lag= 14.3 min Discarded = 0.04 cfs @ 11.45 hrs, Volume= 0.026 of Primary = 0.14 cfs @ 12.31 hrs, Volume= 0.002 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 4.18' @ 12.31 hrs Surf.Area= 200 sf Storage= 361 cf Plug-Flow detention time= 59.4 min calculated for 0.028 of (100% of inflow) Center-of-Mass det. time= 59.0 min ( 797.1 - 738.1 ) Volume Invert Avail.Storage Storage Description #1 0.00, 253 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,000 cf Overall - 157 cf Embedded = 843 cf x 30.0% Voids #2 1.00, 157 cf 24.0" D x 50.01 Pipe Storage Inside #1 410 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 200 0 0 5.00 200 1,000 1,000 Device Routinq Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0" Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.04 cfs @ 11.45 hrs HW=0.05' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.12 cfs @ 12.31 hrs HW=4.17' (Free Discharge) L2=Orifice/Grate (Orifice Controls 0.12 cfs @ 1.40 fps) 212190POST-HOWARD STREET Type 111 24-hr 2-yr Rainfall=3.10" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Page 5 Summary for Pond INF-3: Infiltration 3 Inflow Area = 0.140 ac,100.00% Impervious, Inflow Depth > 2.68" for 2-yr event Inflow = 0.42 cfs @ 12.07 hrs, Volume= 0.031 of Outflow = 0.23 cfs @ 12.22 hrs, Volume= 0.031 af, Atten= 47%, Lag= 9.0 min Discarded = 0.04 cfs @ 11.30 hrs, Volume= 0.028 of Primary = 0.19 cfs @ 12.22 hrs, Volume= 0.004 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 4.20' @ 12.20 hrs Surf.Area= 200 sf Storage= 362 cf Plug-Flow detention time= 57.8 min calculated for 0.031 of (100% of inflow) Center-of-Mass det. time= 57.4 min ( 795.5 - 738.1 ) Volume Invert Avail.Storage Storaqe Description #1 0.00, 253 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,000 cf Overall - 157 cf Embedded = 843 cf x 30.0% Voids #2 1.00, 157 cf 24.0" D x 50.0'L Pipe Storage Inside #1 410 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 200 0 0 5.00 200 1,000 1,000 Device Routinq Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0" Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.04 cfs @ 11.30 hrs HW=0.05' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.16 cfs @ 12.22 hrs HW=4.20' (Free Discharge) L2=Orifice/Grate (Orifice Controls 0.16 cfs @ 1.51 fps) 212190POST-HOWARD STREET Type 11124-hr 10-yr Rainfall=4.50" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Paqe 6 Summary for Subcatchment P1: Howard Street Runoff = 0.21 cfs @ 12.10 hrs, Volume= 0.016 at, Depth> 0.76" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rai nfall=4.50" Area (sf) CN Description 2,572 98 Walks 2,554 57 Woods/grass comb., Poor, HSG A 6,152 39 >75% Grass cover, Good, HSG A 11,278 57 Weighted Average 8,706 77.19% Pervious Area 2,572 22.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Subcatchment R-1 : Roof 1 Runoff = 0.56 cfs @ 12.07 hrs, Volume= 0.042 at, Depth> 3.96" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rai nfall=4.50" Area (sf) CN Description 5,516 98 Roofs, HSG A 5,516 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment R-3: Roof 3 & Plaza Runoff = 0.62 cfs @ 12.07 hrs, Volume= 0.046 at, Depth> 3.96" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rai nfall=4.50" Area (sf) CN Description 4,315 98 Roof 3 1,782 98 Plaza 6,097 98 Weighted Average 6,097 100.00% Impervious Area 212190POST-HOWARD STREET Type 11124-hr 10-yr Rainfall=4.50" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Page 7 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Reach 1 R: Howard Street Inflow Area = 0.526 ac, 61.97% Impervious, Inflow Depth > 0.86" for 10-yr event Inflow = 1.50 cfs @ 12.11 hrs, Volume= 0.038 of Outflow = 1.50 cfs @ 12.11 hrs, Volume= 0.038 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Summary for Pond INF-1: Infiltration 1 Inflow Area = 0.127 ac,100.00% Impervious, Inflow Depth > 3.96" for 10-yr event Inflow = 0.56 cfs @ 12.07 hrs, Volume= 0.042 of Outflow = 0.59 cfs @ 12.11 hrs, Volume= 0.042 af, Atten= 0%, Lag= 2.5 min Discarded = 0.04 cfs @ 10.95 hrs, Volume= 0.033 of Primary = 0.55 cfs @ 12.11 hrs, Volume= 0.009 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 4.43' @ 12.12 hrs Surf.Area= 200 sf Storage= 376 cf Plug-Flow detention time= 53.4 min calculated for 0.042 of (100% of inflow) Center-of-Mass det. time= 52.9 min ( 788.0 - 735.0 ) Volume Invert Avail.Storage Storage Description #1 0.00, 253 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,000 cf Overall - 157 cf Embedded = 843 cf x 30.0% Voids #2 1.00, 157 cf 24.0" D x 50.01 Pipe Storage Inside #1 410 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 200 0 0 5.00 200 1,000 1,000 Device Routinq Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0" Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.04 cfs @ 10.95 hrs HW=0.05' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.48 cfs @ 12.11 hrs HW=4.34' (Free Discharge) L2=Orifice/Grate (Orifice Controls 0.48 cfs @ 2.00 fps) 212190POST-HOWARD STREET Type 11124-hr 10-yr Rainfall=4.50" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Page 8 Summary for Pond INF-3: Infiltration 3 Inflow Area = 0.140 ac,100.00% Impervious, Inflow Depth > 3.96" for 10-yr event Inflow = 0.62 cfs @ 12.07 hrs, Volume= 0.046 of Outflow = 0.80 cfs @ 12.10 hrs, Volume= 0.046 af, Atten= 0%, Lag= 1.9 min Discarded = 0.04 cfs @ 10.70 hrs, Volume= 0.034 of Primary = 0.76 cfs @ 12.10 hrs, Volume= 0.012 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 4.44' @ 12.10 hrs Surf.Area= 200 sf Storage= 376 cf Plug-Flow detention time= 52.0 min calculated for 0.046 of (100% of inflow) Center-of-Mass det. time= 51.7 min ( 786.7 - 735.0 ) Volume Invert Avail.Storage Storaqe Description #1 0.00, 253 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,000 cf Overall - 157 cf Embedded = 843 cf x 30.0% Voids #2 1.00, 157 cf 24.0" D x 50.0'L Pipe Storage Inside #1 410 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 200 0 0 5.00 200 1,000 1,000 Device Routinq Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0" Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.04 cfs @ 10.70 hrs HW=0.05' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.73 cfs @ 12.10 hrs HW=4.43' (Free Discharge) L2=Orifice/Grate (Orifice Controls 0.73 cfs @ 2.24 fps) 212190POST-HOWARD STREET Type 11124-hr 100-yr Rainfall=6.50" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment P1: Howard Street Runoff = 0.57 cfs @ 12.09 hrs, Volume= 0.039 af, Depth> 1.81" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 2,572 98 Walks 2,554 57 Woods/grass comb., Poor, HSG A 6,152 39 >75% Grass cover, Good, HSG A 11,278 57 Weighted Average 8,706 77.19% Pervious Area 2,572 22.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Subcatchment R-1: Roof 1 Runoff = 0.81 cfs @ 12.07 hrs, Volume= 0.061 af, Depth> 5.78" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 5,516 98 Roofs, HSG A 5,516 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment R-3: Roof 3 & Plaza Runoff = 0.90 cfs @ 12.07 hrs, Volume= 0.067 af, Depth> 5.78" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 4,315 98 Roof 3 1,782 98 Plaza 6,097 98 Weighted Average 6,097 100.00% Impervious Area 212190POST-HOWARD STREET Type 11124-hr 100-yr Rainfall=6.50" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Page 10 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Reach 1 R: Howard Street Inflow Area = 0.526 ac, 61.97% Impervious, Inflow Depth > 2.00" for 100-yr event Inflow = 2.20 cfs @ 12.08 hrs, Volume= 0.087 of Outflow = 2.20 cfs @ 12.08 hrs, Volume= 0.087 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Summary for Pond INF-1: Infiltration 1 Inflow Area = 0.127 ac,100.00% Impervious, Inflow Depth > 5.78" for 100-yr event Inflow = 0.81 cfs @ 12.07 hrs, Volume= 0.061 of Outflow = 0.82 cfs @ 12.09 hrs, Volume= 0.061 af, Atten= 0%, Lag= 1.0 min Discarded = 0.04 cfs @ 9.95 hrs, Volume= 0.039 of Primary = 0.78 cfs @ 12.09 hrs, Volume= 0.022 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 4.45' @ 12.09 hrs Surf.Area= 200 sf Storage= 377 cf Plug-Flow detention time= 48.8 min calculated for 0.061 of (100% of inflow) Center-of-Mass det. time= 48.3 min ( 781.4 - 733.1 ) Volume Invert Avail.Storage Storage Description #1 0.00, 253 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,000 cf Overall - 157 cf Embedded = 843 cf x 30.0% Voids #2 1.00, 157 cf 24.0" D x 50.01 Pipe Storage Inside #1 410 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 200 0 0 5.00 200 1,000 1,000 Device Routing Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0" Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.04 cfs @ 9.95 hrs HW=0.05' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.75 cfs @ 12.09 hrs HW=4.44' (Free Discharge) L2=Orifice/Grate (Orifice Controls 0.75 cfs @ 2.26 fps) 212190POST-HOWARD STREET Type 11124-hr 100-yr Rainfall=6.50" Prepared by Printed 1/14/2013 HydroCAD® 10.00 s/n 00546 ©2011 HydroCAD Software Solutions LLC Page 11 Summary for Pond INF-3: Infiltration 3 Inflow Area = 0.140 ac,100.00% Impervious, Inflow Depth > 5.78" for 100-yr event Inflow = 0.90 cfs @ 12.07 hrs, Volume= 0.067 of Outflow = 0.89 cfs @ 12.08 hrs, Volume= 0.067 af, Atten= 1%, Lag= 0.3 min Discarded = 0.04 cfs @ 9.60 hrs, Volume= 0.041 of Primary = 0.85 cfs @ 12.08 hrs, Volume= 0.027 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 4.47' @ 12.08 hrs Surf.Area= 200 sf Storage= 378 cf Plug-Flow detention time= 47.6 min calculated for 0.067 of (100% of inflow) Center-of-Mass det. time= 47.1 min ( 780.2 - 733.1 ) Volume Invert Avail.Storage Storaqe Description #1 0.00, 253 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,000 cf Overall - 157 cf Embedded = 843 cf x 30.0% Voids #2 1.00, 157 cf 24.0" D x 50.0'L Pipe Storage Inside #1 410 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 200 0 0 5.00 200 1,000 1,000 Device Routinq Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0" Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.04 cfs @ 9.60 hrs HW=0.05' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.82 cfs @ 12.08 hrs HW=4.46' (Free Discharge) L2=Orifice/Grate (Orifice Controls 0.82 cfs @ 2.32 fps) P2 R-2 Bacon Street Roof /1NF-2 Infiltration 2 1 R (new Reach) Subca Reach and Link Routing Diagram for 212190POST_BACON STREET Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydror-ad.net, Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) 212190POST_BACON STREET Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Page 2 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.140 39 >75% Grass cover, Good, HSG A (P2) 0.099 98 Driveway&Walks (P2) 0.093 98 Roofs, HSG A (R-2) 0.009 57 Woods/grass comb., Poor, HSG A (P2) 0.341 73 TOTAL AREA You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) 212190POST_BACON STREET Type /// 24-hr 2-yr Rainfall=3.10" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Page 3 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment P2: Bacon Street Runoff = 0.10 cfs @ 12.11 hrs, Volume= 0.009 af, Depth> 0.42" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 4,300 98 Driveway&Walks 383 57 Woods/grass comb., Poor, HSG A 6,084 39 >75% Grass cover, Good, HSG A 10,767 63 Weighted Average 6,467 60.06% Pervious Area 4,300 39.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Subcatchment R-2: Roof 2 Runoff = 0.28 cfs @ 12.07 hrs, Volume= 0.021 af, Depth> 2.68" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 4,070 98 Roofs, HSG A 4,070 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Reach 1 R: (new Reach) Inflow Area = 0.341 ac, 56.41% Impervious, Inflow Depth > 0.30" for 2-yr event Inflow = 0.10 cfs @ 12.11 hrs, Volume= 0.009 of Outflow = 0.10 cfs @ 12.11 hrs, Volume= 0.009 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST_BACON STREET Type 111 24-hr 2-yr Rainfall=3.10" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 4 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Pond INF-2: Infiltration 2 Inflow Area = 0.093 ac,100.00% Impervious, Inflow Depth > 2.68" for 2-yr event Inflow = 0.28 cfs @ 12.07 hrs, Volume= 0.021 of Outflow = 0.05 cfs @ 11.65 hrs, Volume= 0.021 af, Atten= 84%, Lag= 0.0 min Discarded = 0.05 cfs @ 11.65 hrs, Volume= 0.021 of Primary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 2.30' @ 12.54 hrs Surf.Area= 240 sf Storage= 256 cf Plug-Flow detention time= 32.9 min calculated for 0.021 of(100% of inflow) Center-of-Mass det. time= 32.5 min ( 770.7- 738.1 ) Volume Invert Avail.Storage Storage Description #1 0.00, 303 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,200 cf Overall - 188 cf Embedded = 1,012 cf x 30.0%Voids #2 1.00, 188 cf 24.0" D x 60.0'L Pipe Storage Inside#1 492 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 240 0 0 5.00 240 1,200 1,200 Device Routing Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0"Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.05 cfs @ 11.65 hrs HW=0.05' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.00 cfs @ 5.00 hrs HW=0.00' (Free Discharge) L2=Orifice/Grate ( Controls 0.00 cfs) You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) 212190POST_BACON STREET Type /// 24-hr 10-yr Rainfall=4.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 5 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment P2: Bacon Street Runoff = 0.32 cfs @ 12.09 hrs, Volume= 0.022 af, Depth> 1.09" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rainfall=4.50" Area (sf) CN Description 4,300 98 Driveway&Walks 383 57 Woods/grass comb., Poor, HSG A 6,084 39 >75% Grass cover, Good, HSG A 10,767 63 Weighted Average 6,467 60.06% Pervious Area 4,300 39.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Subcatchment R-2: Roof 2 Runoff = 0.41 cfs @ 12.07 hrs, Volume= 0.031 af, Depth> 3.96" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rainfall=4.50" Area (sf) CN Description 4,070 98 Roofs, HSG A 4,070 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Reach 1 R: (new Reach) Inflow Area = 0.341 ac, 56.41% Impervious, Inflow Depth > 0.81" for 10-yr event Inflow = 0.32 cfs @ 12.09 hrs, Volume= 0.023 of Outflow = 0.32 cfs @ 12.09 hrs, Volume= 0.023 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST_BACON STREET Type 111 24-hr 10-yr Rainfall=4.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 6 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Pond INF-2: Infiltration 2 Inflow Area = 0.093 ac,100.00% Impervious, Inflow Depth > 3.96" for 10-yr event Inflow = 0.41 cfs @ 12.07 hrs, Volume= 0.031 of Outflow = 0.11 cfs @ 12.46 hrs, Volume= 0.031 af, Atten= 74%, Lag= 23.4 min Discarded = 0.05 cfs @ 11.55 hrs, Volume= 0.030 of Primary = 0.06 cfs @ 12.46 hrs, Volume= 0.001 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 4.12' @ 12.46 hrs Surf.Area= 240 sf Storage= 428 cf Plug-Flow detention time= 60.5 min calculated for 0.031 of(100% of inflow) Center-of-Mass det. time= 60.0 min ( 795.0- 735.0 ) Volume Invert Avail.Storage Storage Description #1 0.00, 303 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,200 cf Overall - 188 cf Embedded = 1,012 cf x 30.0%Voids #2 1.00, 188 cf 24.0" D x 60.0'L Pipe Storage Inside#1 492 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 240 0 0 5.00 240 1,200 1,200 Device Routing Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0"Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.05 cfs @ 11.55 hrs HW=0.06' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.05 cfs @ 12.46 hrs HW=4.11' (Free Discharge) L2=Orifice/Grate (Orifice Controls 0.05 cfs @ 1.13 fps) You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) 212190POST_BACON STREET Type/1/ 24-hr 100-yr Rainfall=6.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 7 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment P2: Bacon Street Runoff = 0.72 cfs @ 12.08 hrs, Volume= 0.048 af, Depth> 2.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 4,300 98 Driveway&Walks 383 57 Woods/grass comb., Poor, HSG A 6,084 39 >75% Grass cover, Good, HSG A 10,767 63 Weighted Average 6,467 60.06% Pervious Area 4,300 39.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Minimum Summary for Subcatchment R-2: Roof 2 Runoff = 0.60 cfs @ 12.07 hrs, Volume= 0.045 af, Depth> 5.78" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 4,070 98 Roofs, HSG A 4,070 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Reach 1 R: (new Reach) Inflow Area = 0.341 ac, 56.41% Impervious, Inflow Depth > 1.97" for 100-yr event Inflow = 1.16 cfs @ 12.15 hrs, Volume= 0.056 of Outflow = 1.16 cfs @ 12.15 hrs, Volume= 0.056 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST_BACON STREET Type/1/ 24-hr 100-yr Rainfall=6.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 8 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Pond INF-2: Infiltration 2 Inflow Area = 0.093 ac,100.00% Impervious, Inflow Depth > 5.78" for 100-yr event Inflow = 0.60 cfs @ 12.07 hrs, Volume= 0.045 of Outflow = 0.66 cfs @ 12.15 hrs, Volume= 0.045 af, Atten= 0%, Lag= 5.0 min Discarded = 0.05 cfs @ 11.15 hrs, Volume= 0.037 of Primary = 0.61 cfs @ 12.15 hrs, Volume= 0.008 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 4.39' @ 12.16 hrs Surf.Area= 240 sf Storage= 448 cf Plug-Flow detention time= 54.3 min calculated for 0.045 of(100% of inflow) Center-of-Mass det. time= 54.0 min ( 787.1 - 733.1 ) Volume Invert Avail.Storage Storage Description #1 0.00, 303 cf Custom Stage Data(Prismatic) Listed below (Recalc) 1,200 cf Overall - 188 cf Embedded = 1,012 cf x 30.0%Voids #2 1.00, 188 cf 24.0" D x 60.0'L Pipe Storage Inside#1 492 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 240 0 0 5.00 240 1,200 1,200 Device Routing Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area #2 Primary 4.00' 12.0"Vert. Orifice/Grate C= 0.600 Discarded OutFlow Max=0.05 cfs @ 11.15 hrs HW=0.05' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.57 cfs @ 12.15 hrs HW=4.38' (Free Discharge) L2=Orifice/Grate (Orifice Controls 0.57 cfs @ 2.10 fps) You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) Abutter Subca Reach and Link Routing Diagram for 212190POST-ABUTTER Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydror-ad.net, Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) 212190POST-ABUTTER Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Page 2 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.040 57 Woods/grass comb., Poor, HSG A (E3) 0.040 57 TOTAL AREA You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ABUTTER Type /// 24-hr 2-yr Rainfall=3.10" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Page 3 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment El Abutter Runoff = 0.01 cfs @ 12.29 hrs, Volume= 0.001 af, Depth> 0.24" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 1,747 57 Woods/grass comb., Poor, HSG A 1,747 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ABUTTER Type /// 24-hr 10-yr Rainfall=4.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 4 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment El Abutter Runoff = 0.03 cfs @ 12.10 hrs, Volume= 0.003 af, Depth> 0.76" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rainfall=4.50" Area (sf) CN Description 1,747 57 Woods/grass comb., Poor, HSG A 1,747 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ABUTTER Type/1/ 24-hr 100-yr Rainfall=6.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 5 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment El Abutter Runoff = 0.09 cfs @ 12.09 hrs, Volume= 0.006 af, Depth> 1.81" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 1,747 57 Woods/grass comb., Poor, HSG A 1,747 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) R-4 Roof 4 k Drive /1NF 44 Infiltration 4 Subca Reach and :Link 11 Routing Diagram for 212190POST-ROOF 4&DRIVE Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydror-ad.net, Printed 1/7/2013 HydroCADO 10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) 212190POST-ROOF 4 & DRIVE Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Page 2 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.045 39 >75% Grass cover, Good, HSG A (R-4) 0.128 98 Driveway (R-4) 0.019 98 Pavement (R-4) 0.047 98 Plaza (R-4) 0.095 98 Roof 4 (R-4) 0.334 90 TOTAL AREA You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ROOF 4 & DRIVE Type /// 24-hr 2-yr Rainfall=3.10" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Page 3 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment R-4: Roof 4 & Drive Runoff = 0.81 cfs @ 12.07 hrs, Volume= 0.054 af, Depth> 1.95" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2-yr Rainfall=3.10" Area (sf) CN Description 4,127 98 Roof 4 5,570 98 Driveway 2,044 98 Plaza 830 98 Pavement 1,975 39 >75% Grass cover, Good, HSG A 14,546 90 Weighted Average 1,975 13.58% Pervious Area 12,571 86.42% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Pond INF-4: Infiltration 4 Inflow Area = 0.334 ac, 86.42% Impervious, Inflow Depth > 1.95" for 2-yr event Inflow = 0.81 cfs @ 12.07 hrs, Volume= 0.054 of Outflow = 0.15 cfs @ 11.75 hrs, Volume= 0.054 af, Atten= 82%, Lag= 0.0 min Discarded = 0.15 cfs @ 11.75 hrs, Volume= 0.054 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 1.96' @ 12.53 hrs Surf.Area= 780 sf Storage= 671 cf Plug-Flow detention time= 28.4 min calculated for 0.054 of(100% of inflow) Center-of-Mass det. time= 28.2 min ( 803.0- 774.8 ) Volume Invert Avail.Storage Storage Description #1 0.00, 914 cf Custom Stage Data(Prismatic) Listed below (Recalc) 4,680 cf Overall - 1,634 cf Embedded = 3,046 cf x 30.0%Voids #2 1.00, 1,634 cf 48.0" D x 130.01 Pipe Storage Inside#1 2,548 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 780 0 0 6.00 780 4,680 4,680 You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ROOF 4 & DRIVE Type /// 24-hr 2-yr Rainfall=3.10" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 4 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Device Routing Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area Discarded OutFlow Max=0.15 cfs @ 11.75 hrs HW=0.08' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.15 cfs) You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ROOF 4 & DRIVE Type /// 24-hr 10-yr Rainfall=4.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 5 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment R-4: Roof 4 & Drive Runoff = 1.30 cfs @ 12.07 hrs, Volume= 0.089 af, Depth> 3.21" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10-yr Rainfall=4.50" Area (sf) CN Description 4,127 98 Roof 4 5,570 98 Driveway 2,044 98 Plaza 830 98 Pavement 1,975 39 >75% Grass cover, Good, HSG A 14,546 90 Weighted Average 1,975 13.58% Pervious Area 12,571 86.42% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Pond INF-4: Infiltration 4 Inflow Area = 0.334 ac, 86.42% Impervious, Inflow Depth > 3.21" for 10-yr event Inflow = 1.30 cfs @ 12.07 hrs, Volume= 0.089 of Outflow = 0.15 cfs @ 11.60 hrs, Volume= 0.089 af, Atten= 89%, Lag= 0.0 min Discarded = 0.15 cfs @ 11.60 hrs, Volume= 0.089 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 3.18' @ 12.72 hrs Surf.Area= 780 sf Storage= 1,380 cf Plug-Flow detention time= 68.9 min calculated for 0.089 of(100% of inflow) Center-of-Mass det. time= 68.7 min ( 831.7- 763.0 ) Volume Invert Avail.Storage Storage Description #1 0.00, 914 cf Custom Stage Data(Prismatic) Listed below (Recalc) 4,680 cf Overall - 1,634 cf Embedded = 3,046 cf x 30.0%Voids #2 1.00, 1,634 cf 48.0" D x 130.01 Pipe Storage Inside#1 2,548 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 780 0 0 6.00 780 4,680 4,680 You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ROOF 4 & DRIVE Type /// 24-hr 10-yr Rainfall=4.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 6 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Device Routing Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area Discarded OutFlow Max=0.15 cfs @ 11.60 hrs HW=0.06' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.15 cfs) You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ROOF 4 & DRIVE Type /// 24-hr 100-yr Rainfall=6.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 7 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Summary for Subcatchment R-4: Roof 4 & Drive Runoff = 1.99 cfs @ 12.07 hrs, Volume= 0.140 af, Depth> 5.04" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100-yr Rainfall=6.50" Area (sf) CN Description 4,127 98 Roof 4 5,570 98 Driveway 2,044 98 Plaza 830 98 Pavement 1,975 39 >75% Grass cover, Good, HSG A 14,546 90 Weighted Average 1,975 13.58% Pervious Area 12,571 86.42% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Pond INF-4: Infiltration 4 Inflow Area = 0.334 ac, 86.42% Impervious, Inflow Depth > 5.04" for 100-yr event Inflow = 1.99 cfs @ 12.07 hrs, Volume= 0.140 of Outflow = 0.15 cfs @ 11.25 hrs, Volume= 0.131 af, Atten= 93%, Lag= 0.0 min Discarded = 0.15 cfs @ 11.25 hrs, Volume= 0.131 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 6.00' @ 13.17 hrs Surf.Area= 780 sf Storage= 2,547 cf Plug-Flow detention time= 143.4 min calculated for 0.131 of(93% of inflow) Center-of-Mass det. time= 120.0 min ( 873.4- 753.5 ) Volume Invert Avail.Storage Storage Description #1 0.00, 914 cf Custom Stage Data(Prismatic) Listed below (Recalc) 4,680 cf Overall - 1,634 cf Embedded = 3,046 cf x 30.0%Voids #2 1.00, 1,634 cf 48.0" D x 130.01 Pipe Storage Inside#1 2,548 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 780 0 0 6.00 780 4,680 4,680 You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) 212190POST-ROOF 4 & DRIVE Type /// 24-hr 100-yr Rainfall=6.50" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/7/2013 HydroCAD®10.00 Sampler s/n S09862 ©2012 HydroCAD Software Solutions LLC Paqe 8 This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete documentation, technicalsupport, training materials, and additional features which are essential for actual design work. Device Routing Invert Outlet Devices #1 Discarded 0.00' 8.270 in/hr Exfiltration over Surface area Discarded OutFlow Max=0.15 cfs @ 11.25 hrs HW=0.06' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.15 cfs) You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.noval)df.com) Groundwater Recharge: Available Storage Hydrologic Group Volume to Recharge (x Total Impervious Area) Volume to Recharge x Total Hydrologic Group Impervious Area A 0.60 inches of runoff B 0.35 inches of runoff C 0.25 inches of runoff D 0.10 inches of runoff Impervious Area including roof Volume to Recharge Imp. Area x Vol. to BMP (sf) (inches) Recharge(cf) Provided Storage(cf) Infiltration System#1 5,516 0.60 275.8 350 Infiltration System#2 4,070 0.60 203.5 420 Infiltration System#3 6,097 0.60 304.9 350 Infiltration System#4 12,571 0.60 628.6 2,548 28,254 Total 1,412.7 I 3,668 Project: VTP#: 212190 Prepared By: M.DiStefano Date: 12/27/2012 You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) 72-HOUR RECHARGE DRAWDOWN CALCULATION Project: 45 Bacon Street Location: Watertown,N A Infiltration System#1 Step No. 1 Method: Static 0.6-inch of runoff(cubic Static 2 feet): 275.8 as determined by the Method 3 Bottom Area(in Feet) 200 In-Situ Saturated ONLY-If using Dynamic: Hydraulic Hydraulic Conductivity In-Situ Method-->Enter Conductivity Rate: Rate 4a Hydraulic Conductivity Rate I 1 0 NRCS Hydrologic Infiltration Rate Texture Class Soil Group(HSG) (Inches/Hour) 4b Sand I A 8.27 Hours T imed,•awdown= 2.00 72-Hour Drawdown Requirement Check: OK Infiltration System #2 Step No. 1 Method: Static 0.6-inch of runoff(cubic Static 2 feet): 203.5 as determined by the Method 3 Bottom Area(in Feet) 240 In-Situ Saturated ONLY-If using Dynamic: Hydraulic Hydraulic Conductivity In-Situ Method-->Enter Conductivity Rate: Rate 4a Hydraulic Conductivity Rate I 10 NRCS Hydrologic Infiltration Rate Texture Class Soil Group(HSG) (Inches/Hour) 4b Sand A 8.27 Hours Timedrawdown= 1.23 72-Hour Drawdown Requirement Check: OK Infiltration System#3 Step No. 1 Method: Static 0.6-inch of runoff(cubic Static 2 feet): 304.9 as determined by the Method 3 Bottom Area(in Feet) 200 In-Situ Saturated ONLY-If using Dynamic: Hydraulic Hydraulic Conductivity In-Situ Method-->Enter Conductivity Rate: Rate 4a Hydraulic Conductivity Rate I 10 NRCS Hydrologic Infiltration Rate 7Texture Class Soil Group(HSG) (Inches/Hour) 4b Sand I A 8.27 Hours T lmedrawdown— 2.21 72-Hour Drawdown Requirement Check: OK Infiltration System#4 Step No. 1 Method: Static 0.6-inch of runoff(cubic Static 2 feet): 628.6 as determined by the Method 3 Bottom Area(in Feet) 780 In-Situ Saturated ONLY-If using Dynamic: Hydraulic Hydraulic Conductivity In-Situ Method-->Enter Conductivity Rate: Rate 4a Hydraulic Conductivity Rate 0 NRCS Hydrologic Infiltration Rate Texture Class Soil Group(HSG) (Inches/Hour) 4b Sand A 8.27 Hours Tlmedrawdown— 1 .17 72-Hour Drawdown Requirement Check: V INSTRUCTIONS: Version 1,Automated:Mar. 4, 2008 1. In BMP Column, click on Blue Cell to Activate Drop Down Menu 2. Select BMP from Drop Down Menu 3. After BMP is selected, TSS Removal and other Columns are automatically completed. Location: INFILTRATION SYSTEM #1 1 B C D E F TSS Removal Starting TSS Amount Remaining BMP' Rate' Load* Removed (C*D) Load (D-E) Infiltration Basin 0.80 1.00 0.80 0.20 N 9 i O O 0.00 0.20 0.00 0.20 E p0.00 0.20 0.00 0.20 t� 0.00 0.20 0.00 0.20 ca C.� 0.00 0.20 0.00 0.20 Separate Form Needs to be Completed for Each Total TSS Removal - 80% Outlet or BMP Train Project: "TP#:212190 Prepared By: M. DiStefano *Equals remaining load from previous BMP (E) Date: 12/27/2012 which enters the BMP Non-automated TSS Calculation Sheet must be used if Proprietary BMP Proposed 1. From MassDEP Stormwater Handbook Vol. 1 Mass. Dept. of Environmental Protection You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) V INSTRUCTIONS: Version 1,Automated:Mar. 4, 2008 1. In BMP Column, click on Blue Cell to Activate Drop Down Menu 2. Select BMP from Drop Down Menu 3. After BMP is selected, TSS Removal and other Columns are automatically completed. Location: INFILTRATION SYSTEM #2 1 B C D E F TSS Removal Starting TSS Amount Remaining BMP' Rate' Load* Removed (C*D) Load (D-E) Infiltration Basin 0.80 1.00 0.80 0.20 N 9 i O O 0.00 0.20 0.00 0.20 E p0.00 0.20 0.00 0.20 t� 0.00 0.20 0.00 0.20 ca C.� 0.00 0.20 0.00 0.20 Separate Form Needs to be Completed for Each Total TSS Removal - 80% Outlet or BMP Train Project: "TP#:212190 Prepared By: M. DiStefano *Equals remaining load from previous BMP (E) Date: 12/27/2012 which enters the BMP Non-automated TSS Calculation Sheet must be used if Proprietary BMP Proposed 1. From MassDEP Stormwater Handbook Vol. 1 Mass. Dept. of Environmental Protection You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) V INSTRUCTIONS: Version 1,Automated:Mar. 4, 2008 1. In BMP Column, click on Blue Cell to Activate Drop Down Menu 2. Select BMP from Drop Down Menu 3. After BMP is selected, TSS Removal and other Columns are automatically completed. Location: INFILTRATION SYSTEM #3 1 B C D E F TSS Removal Starting TSS Amount Remaining BMP' Rate' Load* Removed (C*D) Load (D-E) Infiltration Basin 0.80 1.00 0.80 0.20 N 9 i O O 0.00 0.20 0.00 0.20 E p0.00 0.20 0.00 0.20 t� 0.00 0.20 0.00 0.20 ca C.� 0.00 0.20 0.00 0.20 Separate Form Needs to be Completed for Each Total TSS Removal - 80% Outlet or BMP Train Project: "TP#:212190 Prepared By: M. DiStefano *Equals remaining load from previous BMP (E) Date: 12/27/2012 which enters the BMP Non-automated TSS Calculation Sheet must be used if Proprietary BMP Proposed 1. From MassDEP Stormwater Handbook Vol. 1 Mass. Dept. of Environmental Protection You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) V INSTRUCTIONS: Version 1,Automated:Mar. 4, 2008 1. In BMP Column, click on Blue Cell to Activate Drop Down Menu 2. Select BMP from Drop Down Menu 3. After BMP is selected, TSS Removal and other Columns are automatically completed. Location: INFILTRATION SYSTEM #4 1 B C D E F TSS Removal Starting TSS Amount Remaining BMP' Rate' Load* Removed (C*D) Load (D-E) (1) Deep Sump and Hooded Catch Basin 0.25 1.00 0.25 0.75 N 9 i O o Infiltration Basin 0.80 0.75 0.60 0.15 E ?j 0 0.00 0.15 0.00 0.15 ~ 0.00 0.15 0.00 0.15 C� V 0.00 0.15 0.00 0.15 Separate Form Needs to be Completed for Each Total TSS Removal - 85% Outlet or BMP Train Project: "TP#:212190 Prepared By: M. DiStefano *Equals remaining load from previous BMP (E) Date: 12/27/2012 which enters the BMP Non-automated TSS Calculation Sheet must be used if Proprietary BMP Proposed 1. From MassDEP Stormwater Handbook Vol. 1 Mass. Dept. of Environmental Protection You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com)