HomeMy Public PortalAbout20190311 - Planning Board - Agenda
HOPKINTON PLANNING BOARD
Monday, March 11, 2019 7:30 P.M.
Hopkinton Town Hall, 18 Main Street, Hopkinton, MA; Room 215/216
AGENDA
7:30 Continued Public Hearings – Bucklin St. & Leonard St. – 1) Stormwater
Management Permit Application; 2) Petition to construct a paper street – Wall
Street Development Corp.
Proposed construction of a paper street entitled “Bucklin Street”; design and
construction standards. Proposal to construct four single family homes with associated
driveways, utilities, and related grading.
8:20 Ron Nation – Land off Whisper Way
Discuss new concept plan
8:30 Public Hearing – Special Permit Application – Commercial Solar Photovoltaic
Installation – Wilson Street and Cedar Street – TJA Solar
Pursuant to an Order of Remand issued by the Massachusetts Land Court, the Board
shall consider evidence presented in the proceedings on the original petition and any new
evidence and testimony presented as part of the hearing on remand. After consideration
of the evidence, the Board will issue a written decision on the application.
9:30 Approval-Not-Required Plan - Legacy Farms North - Legacy Farms LLC
Approval-Not-Required Plan – 92 Main Street - Duffy
9:35 Trail Coordination & Management Committee
Review Committee Charge and discuss a recommendation for membership
Business to be considered by the Board at any time during the meeting:
Kathleen Towner, Kruger Road - Request for discussion of Wilson St. drainage basin
Street Acceptance - Review draft Street Acceptance Report for Board of Selectmen public
hearing on 3/19/19. Streets proposed for acceptance at 2019 ATM: Penny Meadow Lane,
Hunters Ridge Way.
Review “Growing Locally” workshop materials from event on 2/13/19
Planning Board member reports and future agenda items
Correspondence
Town of Hopkinton
Department of Land Use, Planning and Permitting
18 Main Street, Hopkinton MA 01748
508-497-9745
DATE: March 7, 2019
TO: Planning Board
FROM: Elaine Lazarus, Assistant Town Manager
RE: Items on Planning Board Agenda, March 11, 2019
1. Continued Public Hearings – Bucklin St. & Leonard St. – 1) Stormwater Management
Permit; 2) Petition to Construct a Paper Street – Wall Street Development Corp.
An application for a stormwater management permit (SMP) was submitted to the Board on
11/1/18. A decision is due by 3/20/19 and a majority vote is required for approval. All members
are eligible to vote.
A petition to construct a paper street was submitted to the Board on 7/25/18. A decision is due by
3/20/19. A majority vote is required for approval and all members are eligible to vote.
Project: Proposal to construct a paper street entitled “Bucklin Street”; Proposal to construct 4
single family homes with driveways, utilities and associated grading. A SMP is required because
the project will result in a land disturbance of one acre or more and it is not a “subdivision”.
The applicant submitted revised plans, which have been reviewed by BETA Group. The
materials and the review letter are included with the meeting materials, and BETA Group’s
outstanding comments are noted below.
Consultant Review:
Stormwater Management Criteria: The project is subject to the Stormwater Management
Standards in General Bylaws Chapter 172. The following are the 10 standards, what is proposed,
and BETA’s comments to date.
Stormwater Standard Applicant BETA comment
#1 – No untreated stormwater –
No new stormwater conveyances
(e.g. outfalls) may discharge
untreated stormwater directly to
or cause erosion in wetlands or
waters of the Commonwealth.
The project does not
provide new untreated
stormwater conveyances to
wetlands.
Complies – standard has been
met.
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#2 – Post-development peak
discharge rates – Stormwater
management systems must be
designed so that post-
development peak discharge rates
do not exceed pre-development
peak discharge rates.
The combined overall peak
runoff has been reduced
for the project site. The
flow from Pleasant St. will
eventually combine with
the flow toward the
northerly boundary
downgradient from the
roadway entrance.
Provide mitigation to keep
proposed peak runoff flow to
Pleasant St. at or below
existing condition. In 2011
BETA completed a hydrologic
analysis of the major culvert
crossing Main St. just west of
CVS. We discovered that the
drainage truck lines in
Pleasant St. are currently
significantly undersized for
the 10 year storm event. The
drainage from Pleasant St. is
routed north on Maple St. and
does not combine with the
flow from the site. Provide
BMP’s and/or system
modifications so that there is
no increase in existing flow to
Pleasant St. (SW4)
#3 – Recharge to groundwater –
Loss of annual recharge to
groundwater should be
minimized through the use of
infiltration measures to the
maximum extent practicable.
In response to previous
BETA comment 1)
Groundwater recharge
calculations to be provided
prior to construction.
2) In response to previous
BETA request for
landscape plan describing
the woody and herbaceous
vegetative stabilization and
management techniques to
be used within and
adjacent to the stormwater
practice: Note included on
plan provides for loam and
hydro-seed.
1) Provide addit. test pit in
SW corner of basin to confirm
2’ of separation from bottom
of basin to groundwater
elevation. (see response, left)
BETA response: The proposed
basin is above grade.
Recommend a condition that a
representative of the Town
observe topsoil excavation
prior to placement of fill to
verify design assumption for
soils. (SW7)
2) Board should discuss if
seeding meets the intent of the
requirement. (SW12)
#4 – 80% TSS removal – For
new development, stormwater
management systems must be
designed to remove 80% of the
annual load of total suspended
solids.
Project includes a new
infiltration basin (with
sediment forebay) and
calculations to demonstrate
80% TSS removal.
Complies – standard has been
met.
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#5 – Higher Potential Pollutant
Loads – Stormwater discharges
from land uses with Higher
Potential Pollutant Loads
required the use of specific
stormwater management BMP’s.
Not Applicable Not Applicable
#6 – Critical Areas – Stormwater
discharges to critical areas must
utilize certain stormwater BMP’s
approved for critical areas.
Not Applicable Not Applicable
#7 – Redevelopment –
Redevelopment of previously
developed sites must meet the
Stormwater Management
Standards to the maximum extent
practicable.
Not Applicable Not Applicable
#8 – Construction Period Erosion
and Sediment Controls – Erosion
and sediment controls must be
implemented to prevent impacts
during construction of land
disturbance activities.
A Stormwater Pollution
Prevention Plan (SWPPP)
and an Erosion Control
Plan were submitted.
Recommend including the
following conditions:
1) Provide provisions to
protect the infiltration
basin from sedimentation
during construction. Once
site is stabilized basin can
be excavated to finish
grade. (SW16)
2) Provide a final signed
SWPPP prior to
construction. (SW17)
3) The Town or an agent for
the Town observe the
excavation of the
infiltration basin prior to
loam and seed to verify
design assumptions
including groundwater
elevations and infiltration
rate. (SW18)
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#9 – Operations/Maintenance
Plan – A long-term operation and
maintenance plan shall be
developed and implemented to
ensure that stormwater
management systems function as
designed.
A Long Term Operation
and Maintenance (O&M)
Plan was included.
1) Include in the O&M Plan:
Provide provisions for PB or
its designee to enter the
property at reasonable times to
conduct inspections. (SW21)
2) Provide estimated
operations and maintenance
budget in the O&M Plan.
(SW23)
#10 – Illicit Discharges – All
illicit discharges to the
stormwater management systems
are prohibited.
A signed Illicit Discharge
Statement was provided.
Complies – standard has been
met.
Non-stormwater outstanding BETA comments are:
1. Provide additional spot grades to show positive drainage around the existing house at 62
Pleasant St. (G1)
2. New driveway for house at 62 Pleasant St. shown on plan; will require approval by owner
of 62 Pleasant St. (G3)
3. Applicant proposes overhead utilities. BETA defers to the Board on this issue. (G4)
4. Re truck turning radius for emergency vehicles within Bucklin sT. to turn around. Sketch
Plan provided. Sketch Plan shows vehicle exceeding the length of the easement. Either
expand easement or provide plan that shows vehicle canmake the turnaround in space
provided. BETA defers to Fire Dept. for final approval. (T2)
5. Sketch plan provided that shows truck turns at intersection of Bucklin and Pleasant.
Sketch plan shows fire truck needing to use oncoming lane in Pleasant St. to make the
turn. BETA defers to Fire Dept. for final approval. (T3)
The standard for approving the paper street design and construction details is that the Board must
apply the current Subdivision Regulations to the greatest extent practicable. Waivers requested:
See 2/26/19 BETA letter, page 2.
Petition Process: The Applicant’s representative and Town Counsel have been in discussion
about the status of Bucklin Street, whether the proposed subdivision will qualify for “Approval
Not Required” endorsement, and how to approach reviewing the work needed to build out
Bucklin Street and install utilities, as approval of roadway design is not part of the Stormwater
Management Permit application review. As a result of these discussions, the Applicant has
submitted a petition under the provision of M.G.L. c. 41, sec. 81FF for approval of the
construction of Bucklin Street. In summary, c. 41, §81FF serves to protect lots, shown on a
recorded plan, that were sold off and in existence prior to the Subdivision Control Law (1953)
from having to comply with subdivision regulations.
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Town Counsel agrees that §81FF appears to apply to the subject parcel. However, there are two
important caveats: First, case law has clearly established that planning boards have the authority
to review and impose conditions on construction of roads and utilities associated with lots
protected by §81FF. In the past, the Hopkinton Planning Board has required applicants claiming
the §81FF exemption to petition for Planning Board approval of the roadway and utilities
associated with the grandfathered lot. (The Applicant has now done so, consistent with the
Planning Board’s past practice). Second, the c. 41 §81FF exemption would be applicable to only
the existing lot on Bucklin Street. Subdivision of that lot is fully subject to the Subdivision
Control Law. If the applicant were to obtain approval of the roadway pursuant to c. 41 §81FF,
endorsement of an ANR plan by the Board (or approval of a definitive subdivision plan) would
still be required in order to divide the existing lot.
Ownership of Bucklin Street: Town Counsel believes that the Applicant has made a sufficiently
credible claim of ownership rights in Bucklin Street for the purpose of the roadway petition.
Town Counsel notes that an approval by the Planning Board does not adjudicate property rights,
and that the abutters may choose to contest the Applicant’s rights. Any property rights dispute
would be a private matter between the parties, not involving the Town.
Way in Existence: At the public hearing on Jan. 28, the Board focused on whether Bucklin
Street was a “way in existence” in 1953. The Applicant formally requested that the Board make
a determination on the way in existence question, and the Board voted 2 in favor with 7 opposed
on a motion to determine that Bucklin St. was a way in existence in 1953.
The Board’s votes on the submitted materials will consist of:
✔Determination as to whether Bucklin St. was a way in existence in 1953, for the
purposes of ANR endorsement. BOARD VOTE 1/28/19 When the Applicant submits
an ANR plan, the Board will vote on whether to endorse it.
Vote on the petition relative to the design and construction of Bucklin St., approving or
disapproving the submitted plans. Approval may be with conditions. Include votes on
waiver requests.
Vote on the application for a Stormwater Management Permit.
2. Ron Nation - Land off Whisper Way
Ron Nation is seeking feedback on a plan for land off Whisper Way, the same land which is the
subject of a definitive subdivision plan application currently before the Board. The conceptual
plan would not be the same as the submitted subdivision plan.
3. Public Hearing - Special Permit Application - Commercial Solar Photovoltaic
Installation - Wilson Street and Cedar Street - TJA Solar
In accordance with the Order of Remand to the Board from the Land Court, a decision is due 90
days from the close of the public hearing. The Order of Remand lays out the following with
respect to the procedure:
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1. The Board shall reconsider the evidence presented in the proceedings on the original
petition that is the subject of this action along with the Remand Petition and any new
evidence presented as part of the Remand Petition.
2. At the public hearing, TJA may present evidence and testimony pertaining to the Remand
Petition and the zoning relief requested.
3. After the close of the public hearing, the Board shall consider all the evidence, including
but not limited to evidence presented as part of the proceedings of the original petition,
the Remand Petition, and evidence presented during the public hearing.
4. After consideration of all of the evidence, the Board shall issue a written decision on the
Remand Petition, with findings supported by the evidence in accordance with the Zoning
Bylaws and MGL c.40A sec. 9.
5. The Board shall issue and file the decision with the Town Clerk as soon as possible, no
later than 90 days after the close of the public hearing.
Materials from the original public hearing (minus documents which only pertained to the
Stormwater Management Permit application) plus new materials received as of the date of this
memo are here:
https://drive.google.com/drive/folders/1_7WUC0ZwE5xXaDe5kEXDOIhOWUkDT8AS?usp=sh
aring
No new materials have been submitted by the Applicant as of this writing. A formal Remand
Petition has not been submitted.
Members eligible to vote: Kramer, DeYoung, D’Urso, DeVeuve, Larson-Marlowe, Paul,
Ritterbusch, Trendel.
Approval of a special permit application requires a ⅔ vote of the entire membership, which is 6
votes.
With respect to the findings required, they are:
Zoning Bylaw Section 210-203.D - Approval Criteria: Before the Board may issue a special
permit, it shall determine each of the following:
The commercial solar photovoltaic installation conforms to the provisions of this Article (i.e.
Article XXXI of the Zoning Bylaw, Commercial Solar Photovoltaic Installations);
The commercial solar photovoltaic installation will not be detrimental to the neighborhood or
the Town.
Environmental features of the site and surrounding areas are protected, and specifically areas
will be protected from the proposed use by provision of adequate surface water drainage.
Zoning Bylaw Section 210-223, Special Permits (applies to all special permits and includes the
statutory findings required in MGL c.40A sec. 9): A special permit may only be granted if the
Board determines that:
All applicable criteria and standards set forth in this Chapter (i.e. the Zoning Bylaw) have
been satisfied; and
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Grant of the Special Permit will be in harmony with the general purpose and intent of this
Chapter (Zoning Bylaw).
Zoning Bylaw Section 210-121.1, Buffers around nonresidential uses in residential uses, which
pertains to a requested waiver to the required buffer of 75 feet as shown on the plan:
Upon a finding by the Planning Board that a buffer of lesser width would be sufficient to
screen and/or separate the use from adjacent property, the width of the buffer may be
reduced. The buffer width requirement may also be reduced in the event that the lot was
previously developed and used for a permitted use within the district and permanent
structures were erected within the buffer area. In those circumstances, it is the intent of the
Board not to waive the buffer requirement, but, rather, to provide alternative screening
arrangements, such as fencing and planting where possible.
The Board must discuss each individually and make specific findings on each.
4. Approval Not Required Plan - Legacy Farms North - Legacy Farms LLC
The plan would create a new non-buildable parcel within the “Trails at Legacy Farms” project
for conveyance to the developer. The plan appears entitled to endorsement and a decision is due
by 3/16/19.
5. Approval Not Required Plan - 92 Main Street & 7 Mayhew Street - Duffy
The plan is a re-submission of a plan endorsed by the Board in 1995. The plan was not recorded
with the Registry of Deeds, so a newly endorsed plan is required. The plan involves a land swap
with an abutter. The plan appears entitled to endorsement and a decision is due by 3/26/19.
6. Trail Management & Coordination Committee
The Charge for a new committee created by the Board of Selectmen is enclosed, and one of the
seats is reserved for a member recommended by the Planning Board (it need not be a current
member of the Board). Four at-large members have been appointed by the Board of Selectmen,
and it will likely begin meeting soon.
7. Wilson Street Drainage Basin - Kathleen Towner
At a recent meeting of the Board, Ms. Towner referred to an administrative approval of a change
to the drainage basin off Wilson St. in 2018. I have enclosed in the meeting materials the
information which she referenced.
8. Street Acceptance Report
The Board submitted an article into the 2019 annual town meeting warrant to accept Penny
Meadow Lane and Hunters Ridge Way as public ways. As part of that process, the Board of
Selectmen (BOS) must hold a public hearing, which is scheduled for March 19. The BOS will
expect a street acceptance report from the Planning Board, and a draft has been provided for your
review, along with the inspection reports from the Board’s consultants and the as-built/street
acceptance plans. The DPW will conduct its inspection after the snow cover is gone, but they
have received and reviewed the engineer’s inspection reports and plans.
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In addition to any outstanding items identified by the engineers or the DPW, the Board has
always expected developers to sweep roadways and clean catch basins before the Town takes
ownership.
PUBLIC HEARING OUTLINE
Bucklin Street Stormwater Management Permit (SWMP) & Roadway Petition
10/29/18, 12/3/18, 12/17/18, 1/28/19, 3/11/19
1. ✔ Project introduction and review – Applicant
2. ✔Principal Planner Comments
3. ✔ Consultant Review – BETA Group
4. ✔Planning Board members and Public – Add to outline
5. Detailed Discussion
(a) Site visit follow up
(b) Road design
i. Dead end
(c) Lot layout design
(d) Public safety
i. Fire department access
ii. Traffic impacts from development
(e) Stormwater management
i. Impact on abutters on Pleasant St.
ii. Impact on abutters on Maple Street Extension
iii. Soil testing
iv. Compliance with standards
(f) Utilities; Municipal water & sewer; underground or overhead utilities
(g) Legal issues:
i. Right to make improvements
ii. ✔Way in existence in 1953
(h) Historic Preservation
i. Stone walls
(i) Waiver requests
(j) Conservation Commission review/wetland impacts
6. Public comment/discuss standards and plan revisions to be made
7. Discuss SWMP and Roadway Petition conditions of approval with applicant
8. Public comment
9. ✔Vote on determination relative to Way in Existence in 1953
10. Vote on the Roadway Petition
11. Vote on the Stormwater Management Permit
12. Close public hearing
BETA GROUP, INC.
315 Norwood Park South, 2nd Floor, Norwood, MA 02062
P:781.255.1982 | F:781.255.1974 | W:www.BETA-Inc.com
February 26, 2019
Department of Land Use, Planning, and Permitting
Town Hall
18 Main Street, 3rd Floor
Hopkinton, MA 01748
Attn: Ms. Georgia Wilson Mr. Don MacAdam, M.S.
Principal Planner Conservation Administrator
Re: Bucklin Street Road Constriction, Stormwater Management Permit and Notice of Intent
Peer Review Update
Dear Ms. Wilson and Mr. MacAdam:
BETA Group, Inc. reviewed supplemental/revised document submitted for the proposed Bucklin Street
project off Leonard and Pleasant Streets for the Petition to Approve Road Construction, Stormwater
Management Permit and Notice of Intent in Hopkinton. This letter is provided to update BETA’s findings
and recommendations of submitted documents.
BASIS OF REVIEW
BETA received the following items:
•Response to BETA’s Review Comments, dated February 21, 2019 prepared by GLM Engineering
Consultants, Inc., Holliston, MA
•Letter to the Hopkinton Conservation Commission providing supplemental information dated
February 21, 2019 from EcoTec, Inc., Worcester MA
•Plans (10 sheets) entitled:Plan of Land “Parcel A – Bucklin and Leonard St.” Hopkinton
Massachusetts dated March 29, 2018 revised through February 21, 2019 prepared by GLM
Engineering Consultants, Inc.
•Buffer Zone Alteration and Mitigation Plan entitled:Plan of Land “Parcel A – Bucklin and
Leonard St.” Hopkinton Massachusetts dated March 29, 2018 revised through February 21,
2019 prepared by GLM Engineering Consultants, Inc.
•
COMPILED REVIEW LETTER KEY
BETA reviewed this project previously and provided additional review comments in letters to the Board
dated October 24, 2018 and December 12, 2018 (original comments and responses in italics). GLM
Engineering Consultants, Inc. (GLM) provided responses (responses in standard text) and BETA provided
comments on the status of each (status in bold italics).
SITE AND PROJECT DESCRIPTION
The existing wooded 3.22± acre site is located on the north side of Leonard Street. The project site is
located in the Residential A zoning district and the Water Resources Protection Overlay District. The plan
Ms. Wilson and Mr. MacAdam
February 26, 2019
Page 2 of 7
depicts isolated wetlands on the southwest and southeast corners of the parcel. The site is not located
within a critical area (MassDEP Approved Zone II), NHESP mapped areas of estimated habitats of rare
wildlife or rare species or FEMA mapped 100 year flood zone. NRCS soils maps indicate the soils on site
include Rainbow silt loam with a hydrologic soil group (HSG) of C/D (very slow infiltration rate).
The project proposes to construct a 700± foot long, 20 foot wide road and subdivide the lot into 4 new
lots with public water, sewer services and stormwater management system. Proposed stormwater
management system includes the construction of road swales in series ultimately connecting to a new
drainage basin.
REQUESTED WAIVERS REVIEW
The Applicant has requested the following waivers from the Rules and Regulations Relating to the
Subdivision of Land:
W1.Accept no Environmental Analysis (§5.4)
W2.Accept no Traffic Impact Report (§5.4)
W3.Waiver from road location and alignment (all sub-sections) (§8.2.1)
W4.Waive curbing requirements (all sub-sections) (§8.2.2)
W5.Allow variable width right of way and 20' paved road width (§8.2.3)
W6.Allow no turnaround for dead end street (§8.2.5)
W7.Allow no sidewalks (§8.3)
W8.Waiver from stormwater management (§8.4)
W9.Allow above ground private utilities (§8.7.1)
W10.Accept no street lights (§8.7.2)
W11.Accept 4" x 4" x 3' concrete bounds (§9.11)
W12.Accept no street trees (§9.12)
BETA recommends the Applicant add the following waiver requests.
W13.Allow dead end streets to exceed 500 feet in length (§8.2.5.B).
W14.Allow side slope shall not exceed a ratio of three horizontal to one vertical (§8.2.6)
BETA2: Recommend including approved waivers on title sheet.
ZONING/REGULATIONS REVIEW
Article II Residence A (RA) District
The proposed subdivision plan lots comply with area, lot coverage, frontage, and yard setbacks of the
Residential A District.
Ms. Wilson and Mr. MacAdam
February 26, 2019
Page 3 of 7
Article XII Water Resources Protection Overlay District
The project is located within the Water Resources Protection Overlay District and requires approval for
any use that renders impervious more than 15% or 2,500 square feet of any lot, whichever is greater.
Refer to Stormwater Management section for review of required infiltration practices.
ROAD CONSTRUCTION/SUBDIVISION REVIEW
The proposed project includes the extension of an existing driveway into a 20’ wide paved roadway. The
location of the roadway is between two existing residences (58 & 62 Pleasant Street). Based on the
proposed profile there will also be some regrading required between them. The new roadway will
eliminate the driveway for no. 58. No curbing is proposed and the road is not crowned but is designed to
slope to the south side for drainage purposes. Other than those items and those listed in the Requested
Waivers Review, the road meets the minimum design standards for a rural road.
GENERAL:
G1.Provide missing existing and proposed topography for the proposed road from Pleasant Street to
the project parcel.GLM:Revised See Sheet 2. BETA2: Provide additional spot grades to show
positive drainage between house at 62 Pleasant Street and new road.GLM2: Revised See Sheet
4.BETA3: BETA recommends including a condition that requires positive drainage around the
existing house at 62 Pleasant Street.
G2.Provide driveway culvert crossing detail.GLM:Revised See Sheet 8.BETA2: Detail provided –
issue resolved.
G3.Provide a driveway for the existing house at 62 Pleasant Street off new road.GLM:Revised See
Sheet 8.BETA2: Drive shown – will require approval by owner of 62 Pleasant Street.
G4.Provide location of proposed private utilities.GLM:Proposed overhead utilities.BETA2:
Applicant BETA defers to Board this issue.
TRAFFIC IMPACT ANALYSIS REVIEW
A traffic impact analysis was not provided at this time for review.
T1.Show sight distances on the plans of at least 200 feet in accordance with §8.2.1.E.GLM:Revised
See Sheet 6. (Sight distance exceeds 300 feet in both directions)BETA2: Information provided –
issue resolved.
T2.Provide truck turning plan to demonstrate that emergency vehicles have adequate space within
Bucklin Street to turn around. BETA recommends evaluating alternatives to relying on a private
driveway for the turn around.GLM:Applicant had a meeting with the Fire Dept. and they will be
providing a turning radius guide at which time we will review and provide updated information.
BETA2: Information to be provided – issue remains outstanding.GLM2: See Attached Sketch Plan
with Truck Turn.BETA3: Sketch Plan shows vehicle exceeding the length of the easement.
Either expand easement or provide plan that shows vehicle can make the turnaround in space
provided. BETA defers to fire department for final approval.
T3.Show and label turning radii on the plans and demonstrate that adequate turning radii are
provided at the intersection of Bucklin Street and Pleasant Street.GLM:Revised See Sheet 6.
Ms. Wilson and Mr. MacAdam
February 26, 2019
Page 4 of 7
(Corner radius provided at intersection) BETA2: Provide truck turns at intersection and adjust
curb radii as necessary.GLM2:Information to be provided – issue remains outstanding.GLM2:
See Attached Sketch Plan with Truck Turn.BETA3: Sketch Plan shows fire truck needing to use
oncoming lane in Pleasant Street to make the turn. BETA defers to fire department for final
approval.
STORMWATER MANAGEMENT PERMIT
The existing site is wooded and slopes from the eastern side downward to the western side of the site.
Stormwater currently flows overland to the northwest portion of the site. Although the site has some
slope (2.2%±), a significant portion of the site is flagged as isolated wetlands indicating the presence of
high water table and or poor draining soils both or which require special attention when designing a
stormwater management system to mitigate the impacts of development.
The project proposes to extend an existing driveway into a new 20’ wide paved road, Bucklin Street.
Runoff from Bucklin Street will drain to a series of grass swales. Runoff from proposed houses will be
directed to subsurface infiltration chambers with overflows to the new grass swales. The proposed grass
swales are connected with 12” reinforced concrete pipe under the four new driveways, which drain to a
new basin on the western edge of the project site. The new basin consists of a sediment forebay and
headwall with an outlet to a level spreader draining to the west.
SW1.Provide calculations that indicate swales and driveway culverts can accommodate 25 year storm
event (§8.4.8).GLM:Revised See Stormwater Report Appendix B-1 BETA2: Calculations
provided – issue resolved.
SW2.Include stamp and signature of a Professional Engineer to certify that the Stormwater
Management Plan is in accordance with the criteria established in the Bylaw and the Regulations
(Appendix B, §21).GLM:Revised See Stormwater Report BETA2: Stamp provided – issue
resolved.
MASSACHUSETTS STORMWATER MANAGEMENT STANDARDS:
The project is subject to the Stormwater Management Standards (Stormwater Regulations (SWR) 7.0).
The following are the 10 standards and relative compliance provided by the submitted documentation.
No untreated stormwater (Standard Number 1): No new stormwater conveyances (e.g., outfalls) may
discharge untreated stormwater directly to or cause erosion in wetlands or waters of the
Commonwealth.The project does not provide new untreated stormwater conveyances to wetlands –
complies with standard.
Post-development peak discharge rates (Standard Number 2): Stormwater management systems must
be designed so that post-development peak discharge rates do not exceed pre-development peak
discharge rates.Calculations demonstrate that the proposed development will not increase peak
discharge rates. This standard should be re-evaluated upon addressing all included comments.
SW3.To accommodate offsite stormwater runoff that flows onto and through the site, include the
upland areas that contribute runoff to the project parcel in both existing and proposed
watershed maps and calculations, up to and including runoff that crosses where new road will be
between the existing houses off Pleasant Street.GLM:Revised See Stormwater Report, (Pre &
Post Dev. Area Plans)BETA2: Analysis area revised – issue resolved.
Ms. Wilson and Mr. MacAdam
February 26, 2019
Page 5 of 7
SW4.To better determine impacts to abutters analyze pre and post stormwater runoff at three
analysis points (one along north property line, second along the west property line and third to
Pleasant Street).GLM:Revised See Stormwater Report. BETA2: Analysis area revised. Provide
mitigation to keep proposed peak runoff flow to Pleasant Street at or below existing condition.
GLM2: The combined overall peak runoff has been reduced for the project site. The flow from
Pleasant Street will eventually combine with the flow toward the northerly boundary
downgradient from the roadway entrance.BETA3: In 2011 BETA complete a hydrologic analysis
of the major culvert crossing Main Street just west of CVS. We discovered that the drainage
truck lines in Pleasant Street are currently significantly undersized for the 10 year storm event.
The drainage from Pleasant Street drainage is routed north on Maple Street and does not
combine with the flow from the site. Provide BMPs and or system modifications so that there
is no increase in existing flow to Pleasant Street.
SW5.BETA calculates the 100 year storm at 7.25 in (from Atlas graph page 22) x 1.13 = 8.19 in. Revise
calculations using this rainfall amount.GLM:Revised See Stormwater Report BETA2: Rainfall
data revised – issue resolved.
SW6.To avoid double counting infiltration, model infiltration basin with a CN of 98 – water surface.
GLM:Revised See Stormwater Report (CN 98 for pond area)BETA2: Calculation revised – issue
resolved.
Recharge to groundwater (Standard Number 3): Loss of annual recharge to groundwater should be
minimized through the use of infiltration measures to maximum extent practicable.Groundwater
recharge calculations were provided –refer to comment SW2 above.
SW7.The south side of the infiltration basin is 30± from flagged vegetated wetlands which has a
surface elevation of 501.8±. Provide an additional test pit in the southwest corner of the basin to
confirm that there will be 2 feet of separation from the bottom of the basin to seasonal high
groundwater elevation.GLM:Additional testing to be provided BETA2: Additional testing
needed– issue remains outstanding.GLM2: Additional testing to be provided prior to
construction.BETA3: The proposed basin is above existing grade. Recommend including a
condition that a representative of the Town observe topsoil excavation prior to placement of
fill to verify design assumption for soils.
SW8.Provide a cross section for the proposed drainage basin. Include subgrade materials and depths
as well as slopes and stabilization methods.GLM: Revised See Sheet 7.BETA2: Section provided
– issue resolved.
SW9.Provide detail of sediment forebay outlet weir and stormwater basin emergency overflow.GLM:
BETA2: Detail provided – issue resolved.
SW10.Provide draw down device in stormwater basin for maintenance.GLM:Revised See Sheet 7.
BETA2: Draw down device provided – issue resolved.
SW11.Provide monitoring well in stormwater basin.GLM:Revised See Sheet 7.BETA2: Monitoring well
provided – issue resolved.
SW12.Provide landscape plan describing the woody and herbaceous vegetative stabilization and
management techniques to be used within and adjacent to the stormwater practice (Appendix B,
§20).GLM:Revised See Sheet 7. (Note provided area to be loamed and hydro-seeded)BETA2:
Board should discuss if seeding meets the intent of the requirement.
Ms. Wilson and Mr. MacAdam
February 26, 2019
Page 6 of 7
SW13.In order to maintain level flow from level spreader, provide revise level spreader detail to include
a hard level surface (curb or equivalent) for the weir.GLM:Revised See Sheet 7.BETA2: Curb
provided – issue resolved.
80% TSS Removal (Standard Number 4):For new development, stormwater management systems must
be designed to remove 80% of the annual load of Total Suspended Solids. The proposed project includes
a new infiltration basin (with sediment forebay) and calculations to demonstrate 80% TSS removal –
standard has been met.
Higher Potential Pollutant Loads (Standard Number 5): Stormwater discharges from Land Uses with
Higher Potential Pollutant Loads require the use of specific stormwater management BMPs.The
proposed project is not a LUHPPL –standard does not apply.
Critical Areas (Standard Number 6): Stormwater discharges to critical areas must utilize certain
stormwater management BMPs approved for critical areas.The proposed project does not include
stormwater discharges to critical areas –standard does not apply.
Redevelopment (Standard Number 7): Redevelopment of previously developed sites must meet the
Stormwater Management Standards to the maximum extent practicable.The proposed project is not a
redevelopment of a previously developed site –standard does not apply.
Construction Period Erosion and Sediment Controls (Standard Number 8):Erosion and sediment
controls must be implemented to prevent impacts during construction or land disturbance activities.A
Stormwater Pollution Prevention Plan (SWPPP) was provided as well as an erosion control plan.
SW14.Provide estimates of the total area expected to be disturbed by excavation, grading, or other
construction activities, including dedicated off-site borrow and fill areas (Appendix C, §3.a).GLM:
Revised See Sheet 5.BETA2: Information provided – issue resolved.
SW15.Provide the intended sequence and timing of activities that disturb soils at the site and the
general sequence during the construction process in which the erosion and sediment control
measures will be implemented.GLM:Revised See Sheet 5 BETA2: Notes provided – issue
resolved.
SW16.Provide provisions to protect the infiltration basin from sedimentation during construction.
Provide note that basin is to be initially excavated 12 inches higher than finish grade. Once site is
stabilized basin can be excavated to finish grade.GLM:Revised See Sheet 5. (Note 8.)BETA2:
Include as a condition.
SW17.Recommend including a condition that requires the Applicant provide a final signed SWPPP prior
to construction.GLM:No Comment BETA2: Include as a condition.
SW18.Recommend a condition that the Town or an agent for the Town observe the excavation of the
infiltration basin prior to loam and seed to verify design assumptions including groundwater
elevations and infiltration rate.GLM:No Comment BETA2: Include as a condition.
Operations/maintenance plan (Standard Number 9): A long-Term Operation and Maintenance Plan
shall be developed and implemented to ensure that stormwater management systems function as
designed.
SW19.Show location of vehicle access to drainage basin and easement on the plans.GLM:Revised See
Sheet 3.BETA2: Access provided – issue resolved.
Ms. Wilson and Mr. MacAdam
February 26, 2019
Page 7 of 7
SW20.Provide a map showing the location of the systems and facilities including easements, catch
basins, manholes/access lids, main, and stormwater devices to be included with the Operation
and Maintenance Plan (Appendix D, §2).GLM:Revised See Stormwater O&M.BETA2: Map
provided – issue resolved.
SW21.Include provisions for the Planning Board or its designee to enter the property at reasonable
times and in a reasonable manner for the purpose of inspection within the Operation and
Maintenance Plan (Appendix D, §3.e).GLM:Can this be a condition of approval. BETA2:
Provisions not provided – issue remains outstanding.GLM2: Applicant is agreeable to this
requirement.BETA3: Include provision in O&M Plan.
SW22.Provide signature(s) of the owner(s) on the Operation and Maintenance Plan (Appendix D, §3.f).
GLM:Revised See O&M BETA2: Signature provided – issue resolved.
SW23.Provide an estimated operations and maintenance budget.GLM:Applicant will provide
estimates. BETA2: Information not provided – issue remains outstanding.GLM2: Applicant will
provide estimates.BETA3: Include estimate in O&M Plan.
Illicit Discharges (Standard Number 10): All illicit discharges to the stormwater management systems
are prohibited.
SW24.Provide a signed Illicit Discharge Statement.GLM:Revised See Report BETA2: Statement
provided – issue resolved.
WETLANDS
The proposed project includes work within the 50’ and 100’ buffer zones of two isolated wetlands. The
design plans indicates that the development of lots will create a berm on the north, down gradient side
of the wetlands. Applicant has submitted a Notice of Intent for the proposed work within the
jurisdictional wetland resource areas.
W1.Applicant should provide information on the protection of home from potential flooding and/or
groundwater issues and that foundation drains and subdrains that could impact wetlands will
not be necessary.GLM:Applicant to address this with the Conservation Commission. BETA2:
Information not provided – issue remains outstanding.GLM2:The proposed houses as shown
on the site plan have cellar floor elevations at or above the existing ground elevation
where the house is shown. This will ensure the basement floor is above seasonal high
water table.BETA3: Concern addressed. Consider additional protection from surface flow of
water for house on lot 4A.
Very truly yours,
Philip F Paradis, Jr., PE, LEED AP, CPSWQ
Associate
O:\6200s\6260 - Hopkinton - Bucklin Street\Engineering\Reports\Buckland St Peer Review 2-26-19.docx
Link to Public Hearing Documents – TJA Solar, Wilson St./Cedar St.
https://drive.google.com/open?id=1_7WUC0ZwE5xXaDe5kEXDOIhOWUkDT8AS
TOWN OF HOPKINTON
OFFICE OF THE SELECTMEN
Trail Coordination and Management Committee
Committee Charge
Approved by the Board of Selectmen: January 15, 2019
Town of Hopkinton Overarching Vision: Hopkinton is a vibrant welcoming community
centrally located in New England and nestled 26.2 miles west of Boston. We are endowed with
open spaces, natural resources, facilities and programs that promote a well educated and
healthy community. We are respectful of our past, engaged in our present, and actively
preparing for our future.
Vision Theme: In 2025, Hopkinton has protected additional lands for ensuring water
quality, and for active and passive open space; created more recreational opportunities
for a variety of age groups; and conserved additional natural resources and view sheds
that help define the rural quality that is characteristic of much of the town.
Pursuant to the powers granted to the Board of Selectmen by Section 3-1 of the Town Charter,
the Board of Selectmen hereby charges the Trail Coordination and Management Committee
(TCMC) as follows:
PURPOSE: The Town has a wealth of open spaces available for public enjoyment, and various
public and private entities that work concurrently to provide and maintain public trails. The
purposes of the TCMC are:
● To be advisory to the Board of Selectmen and serve as an “umbrella” over the various
entities,
● To coordinate trail planning, management and maintenance,
● To coordinate the planning of trail networks,
● To provide a sounding board for residents and others with respect to trails, and
● To function as a liaison between the Board of Selectmen and the public and private
entities which work to provide, manage and maintain public trails.
The TCMC will serve as a reference point for trails groups and the public, foster a user-friendly
and open/transparent process, establish branding, promotion and public education, foster
community engagement, and achieve sustainability. The TCMC will support and facilitate a
coordinated approach to trail planning and management, comply with town plans, rules and
regulations, and ensure the implementation of Town Meeting votes, adopted plans, regulations,
regulatory decisions and board/committee actions.
CHARGE: The TCMC will:
2
1. Make recommendations to the Board of Selectmen, the Town Manager, and other boards,
committees and organizations relative to the planning, development, implementation and
management of a townwide trail network and connections to regional trail networks. Areas
of consideration shall include public safety, environmental impacts and environmental
resources, financial impacts, public access and use, accessibility, sustainability, and
mitigation of impacts to abutters.
2. Advise the Board of Selectmen as to the management of specific parcels of land under the
care, custody and control of the Board of Selectmen.
3. Participate in the preparation and implementation of the Town’s Open Space and
Recreation Plan, pursuant to the requirements of the Mass. Dept. of Conservation and
Recreation.
4. Establish a transparent process for managing problems and conflicts; encourage
cooperation in addressing problems and conflicts; manage problems and conflicts and seek
solutions.
5. Make recommendations to the Board of Selectmen and the Town Manager as to the
measures necessary and appropriate to maintain and administer the townwide trail system
and program, including recommending an annual operating budget which includes trash and
debris removal, repairs, mowing, resurfacing, and restoration. Prepare an annual
management plan for guidance.
6. Recommend to the Board of Selectmen for approval, town standards for signage, access
and accessibility, trail marking, parking, mapping, vegetation and wildlife management,
viewshed mitigation, trail design and surface, and trail location as it relates to natural
resources, topography, and proximity to residential abutters. The draft standards shall be
developed in coordination with the Town boards/committees and organizations involved with
developing and maintaining trails on Town land.
7. Promote and encourage partnerships with other Town and Commonwealth agencies and
boards/committees to make Hopkinton a more walkable community.
8. Coordinate and oversee the publication of trail maps and trail guides for use by the public.
9. Encourage public involvement and engagement in the planning, management and use of
trails. Hold at least one public forum annually to solicit public input, ideas and concerns.
10. Meet at least annually with public and private trail groups to discuss proposed trail
development and maintenance plans.
11. Coordinate and manage an adopt-a-trail program, if appropriate, and coordinate volunteer
driven projects.
COMPOSITION: The TCMC shall consist of 7 members who are Hopkinton residents and
appointed by the Board of Selectmen. Initial members shall be appointed to 1, 2 and 3 year
3
terms to achieve staggered terms, and all members appointed thereafter will serve 3 year terms.
No member may serve more than three consecutive terms.
The membership shall be as follows:
● Four members at large;
● One member who is recommended by the Parks and Recreation Commission;
● One member who is recommended by the Conservation Commission;
● One member who is recommended by the Planning Board.
Committees/organizations recommending members may recommend more than one for
consideration, and those recommended need not be members of the recommending body. All
members shall have a demonstrated interest in the development, management and use of
public trails. One member (or associate member) who also has expertise in facilitation and
communication is desirable.
The Board of Selectmen may appoint up to 5 associate (non-voting) members if desired, in
order to broaden the perspective, representation or to facilitate the Charge of the committee.
No associate members shall be appointed until one year after a quorum of full members has
been appointed, so as to allow for time for the Committee to fully consider and clarify its
purpose and charge.
RELATIONSHIP TO EXISTING TOWN BOARDS:
The existing authority of an appointed or elected board/committee is not intended to be modified
by the Charge to the TCMC. While issues, concerns and questions may be reviewed and
recommendations issued by the TCMC, the final decision rests with the entity with jurisdiction.
However, a board/committee with jurisdiction may formally delegate a matter or specific project
to the TCMC, provided that the TCMC agrees to handle the matter or undertake the specific
project.
KEY REFERENCES: Hopkinton Master Plan (2017); Hopkinton Open Space and Recreation
Plan (2013); Trails Guidelines and Best Practices Manual, Mass. Department of Conservation
and Recreation.
OPEN MEETING LAW & PUBLIC RECORDS LAW: The TCMC shall comply with the Open
Meeting Law, Public Records Law, Procurement Law, and any other laws and regulations
relative to public officials and public processes, as applicable.
Trail Coordination & Management Committee
Membership and Terms of Office
Position Member Term
At-Large Member Jamie Wronka 1 year (6/30/19)
At-Large Member Charles Dauchy 2 years (6/30/20)
At-Large Member Peter LaGoy 3 years (6/30/21)
At-Large Member Kenneth Parker 1 year (6/30/19)
Member recommended by
Parks & Recreation
Commission
2 years (6/30/20)
Member recommended by
Conservation Commission
3 years (6/30/21)
Member recommended by
Planning Board
1 year (6/30/19)
Georgia Wilson <gwilson@hopkintonma.gov>Mon, Nov 26, 3:45 PM
to Wayne, Jr., Eric
Wayne,
This change can be approved administratively. I spoke with Phil from BETA and he is okay with the modification as long as the storage capacity does not decrease,
which it appears it is not and you are in fact providing more storage than the approved design. Please forward me an electronic and hard copy of the revised construction
plans prior to starting the basin work.
Thanks!
Georgia
On Mon, Nov 12, 2018 at 5:46 PM Amico, Wayne <WAmico@vhb.com> wrote: Good afternoon Georgia, I hope you are doing well!
VHB recently assisted Baystone Development with the Detention Basin Modification along Wilson Street to vastly increase the capacity of the Detention Basin. It
was previously sized more for water quality than volume, but the new design handles a much larger volume than before.
Baystone is getting ready to construct this basin and because of the vast increase in size of the basin, the costs associated with the Bioretention Soil that were
proposed for the entire bottom of the basin are extremely high.
We took a look to see if we could modify the area of the bioretention soil to keep the same level of treatment and provide some additional storage.
The attached graphics include the design approved by the Commission and a marked up version of the design that would reduce the amount of Biorention soil
and deepen the basin. This revised design modification provides the same level of water quality treatment, provides additional storage capacity while balancing the
overall construction cost.
Could you tell me if this type of a minor change to the design (since the basin is actually getting larger in volume) is something that you as the agent could review
with us and make an administrative change?
Baystone desperately would like to get this work started now and going through any type of long review and approval of this minor change would compromise the
project’s schedule.
Can you let me know your thoughts on this?
Wayne P. Amico, PE Senior Team Leader
Transportation
101 Walnut Street PO Box 9151 Watertown, MA 02472-4026 P 617.607.1577 | M 978.973.3459 | F 617.924.2286 wamico@vhb.com
Engineers | Scientists | Planners | Designers www.vhb.com
Proud to be named 2018 WTS Employer of the Year
This communication and any attachments to this are confidential and intended only for the recipient(s). Any other use, dissemination, copying, or disclosure of this communication is strictly prohibited. If you have
received this communication in error, please notify us and destroy it immediately. Vanasse Hangen Brustlin, Inc. is not responsible for any undetectable alteration, virus, transmission error, conversion, media
degradation, software error, or interference with this transmission or attachments to this transmission. Vanasse Hangen Brustlin, Inc. | info@vhb.com
-- Georgia P. Wilson Principal Planner
Town of Hopkinton
(P) 508-497-9745
18 Main St.
Hopkinton, MA 01748
EXIST SEDIMENT
FOREBAY BOT EL=422'
EXIST OVERFLOW
STONE SWALE EL=423'
PROPOSED RECONSTRUCTED
BIORETENTION BASIN-8
BOTTOM EL=419.5'
CONTRACTOR TO EXCAVATE
39" OF MATERIAL FROM
BOTTOM OF BASIN AND
INSTALL 24" BIORETENTION
SOIL AND 3" SHREDDED
HARDWOOD MULCH
EXTEND OVERFLOW
SWALE TO BOTTOM OF
BASIN
PROPOSED CHECK
DAM
PROPOSED
OVERFLOW STONE
SWALE EL=422'
PROPOSED CONC. PIPE
DIAMETER=18", LENGTH = 25' +/-
START INVERT EL=420.5'
END INVERT EL=420'
PROPOSED FLARED
END SECTION WITH
STONE PROTECTION
EL=420'
PROPOSED EROSION
CONTROL BARRIER AT
LIMIT OF WORK
6" LOAM & SEED WILSON STREETLIMIT OF WORK
COMPACTED LOW
PERMEABILITY CORE
0
SCALE: 1" = 40'
40 160100
\\Vhb\proj\Wat-LD\10018.03\cad\te\planset\LFR-North MassWorks\CSK\CSK-19\2018 Files\Revised_Betacomments\CSK 19_redesign_rev_v2.dwg
November 28, 2018
CSK-19
Basin 8 Regrading
Legacy Farms Road North
Hopkinton, Massachusetts
Sheet 1 of 4
CONSTRUCTION NOTE:
THIS CSK-19 IS SUPPLEMENTING THE APPROVED LEGACY FARMS ROAD NORTH
CONSTRUCTION PLANS DATED FEBRUARY 26, 2015. SOME DETAILS ON THIS CSK-19 MAY
NEED TO BE REFERENCED ON THESE APPROVED PLANS. THE SCOPE OF WORK OF THIS
CSK-19 INCLUDES RECONSTRUCTING THE PREVIOUSLY BUILT BASIN 8 AND ENLARGING IT
\\Vhb\proj\Wat-LD\10018.03\cad\te\planset\LFR-North MassWorks\CSK\CSK-19\2018 Files\Revised_Betacomments\CSK 19_redesign_rev_v2.dwg
November 28, 2018
CSK-19
Basin 8 Regrading
Legacy Farms Road North
Hopkinton, Massachusetts
Sheet 2 of 4
Overflow Stone Swale
N.T.S.
Bioretention Basin
N.T.S.
\\Vhb\proj\Wat-LD\10018.03\cad\te\planset\LFR-North MassWorks\CSK\CSK-19\2018 Files\Revised_Betacomments\CSK 19_redesign_rev_v2.dwg
November 28, 2018
CSK-19
Basin 8 Regrading
Legacy Farms Road North
Hopkinton, Massachusetts
Sheet 3 of 4
N.T.S.
Flared End Section (FES) with Stone Protection
N.T.S.
\\Vhb\proj\Wat-LD\10018.03\cad\te\planset\LFR-North MassWorks\CSK\CSK-19\2018 Files\Revised_Betacomments\CSK 19_redesign_rev_v2.dwg
November 28, 2018
CSK-19
Basin 8 Regrading
Legacy Farms Road North
Hopkinton, Massachusetts
Sheet 4 of 412"3'
PROP BOTTOM
OF SWALE
DRAINAGE
SWALEVARIES3'VARIES
CHECK DAM
REFERENCE
POINT
SCALE: N.T.S.DATE: OCTOBER 25 2016SOURCE: VHB
CHECK DAM WITH 3:1 TRANSVERSE SLOPE
NOTES:
1.CONTRACTOR SHALL FIELD VERIFY THAT THE DIFFERENCE BETWEEN CHECK DAM REFERENCE POINT ELEVATION AND ADJACENT ROADWAY
ELEVATION IS NOT LESS THAN 1-FOOT. IF FIELD CONDITIONS DO NOT RESULT IN 1-FOOT ELEVATION DIFFERENCE BETWEEN PROVIDED
CHECK DAM REFERENCE POINT AND ADJACENT ROADWAY ELEVATION AT EDGE OF PAVEMENT, CONTRACTOR SHALL NOTIFY ENGINEER.
2.MODIFIED ROCK FILL TO BE PLACED IN TWO LIFTS TO ALLOW FOR THE APPLICATION OF COMPOST TOPSOIL. APPLY COMPOST TOPSOIL OVER
AND WITHIN THE MODIFIED ROCK FILL. MATERIAL SHOULD BE PLACED SO THAT SETTLED MATERIAL IS AT OR SLIGHTLY BELOW SURFACE
PLANE OF STONE AND SHALL BE WORKED INTO THE VOIDS OF THE MODIFIED ROCK FILL. COMPOST TOPSOIL SHALL BE RAKED BY HAND.
MEET EXISTING GRADE
CHECK DAM HEIGHT
VARIES (SEE PLAN)
FLOW
ORDINARY BORROW
1:1 SLOPE
DENSE GRADED
CRUSHED STONE
CORE
EXISTING GRADE
1:1 SLOPE
TOP STONE DEPTH VARIES
MEET
EXISTING
GRADE
FLOW
MEET EXISTING GRADE
PLACED MODIFIED ROCK FILL.
PLACE COMPOST TOPSOIL
OVER AND WITHIN VOIDS WITH
SEEDING OVER (SEE NOTE 2)
CHECK DAM
REFERENCE POINT
EXISTING GROUND
DENSE GRADED CRUSHED STONE
(DEPTH VARIES- SEE CHART)
PLACED MODIFIED ROCK FILL. PLACE
COMPOST TOPSOIL OVER AND WITHIN
VOIDS WITH SEEDING OVER.
LIMIT OF STONE
VARIES
3:1
CHECK DAM REFERENCE POINT
MUST BE A MINIMUM OF ONE (1)
FOOT BELOW ADJACENT
ROADWAY ELEVATION
3:1
FLOWFLOW
PROP BOTTOM
OF SWALE SLOPEVARIESSLOPEVARIESCL
DRAINAGE
SWALE
3
1
3
1
2'
12"
12"SECTION
A-A
3%3%12"12"SECTION
B-B 3%3%AA
B
B
PLAN12"6"12" PLACED MODIFIED ROCK FILL.
PLACE COMPOST TOPSOIL OVER AND
WITHIN VOIDS WITH SEEDING OVER.
(SEE NOTE 2)
MEET EXISTING GRADE
1'1'
KEY DEPTH VARIES
TOWN OF HOPKINTON
OFFICE OF THE SELECTMEN
PUBLIC HEARING NOTICE
The Board of Selectmen will hold a public hearing on Tuesday, March 19, 2019 at 7:30 PM at
the Town Hall, 18 Main Street, Hopkinton, MA pursuant to Massachusetts General Laws
Chapter 82 Section 21, to discuss accepting and laying out the following streets as public ways:
Penny Meadow Lane
Hunters Ridge Way
There will be an article on the 2019 Annual Town Meeting warrant, which opens on May 6,
2019, requesting the acceptance of the aforementioned streets. Information about the streets and
the acceptance process is available by calling Elaine Lazarus at 508-497-9700, or email at
elainel@hopkintonma.gov. The Town Hall is handicapped accessible.
Hopkinton Board of Selectmen
18 Main Street, Hopkinton, MA 01748| 508-497-9700 | www.hopkintonma.gov
TOWN OF HOPKINTON
PLANNING BOARD
18 MAIN STREET
HOPKINTON, MA 01748
(508) 497-9745
March , 2019
Claire Wright, Chair
Board of Selectmen
18 Main Street
Hopkinton, MA 01748
Re: Street Acceptance Report
Dear Claire:
Pursuant to the requirements of Mass. General Laws Chapter 41 Section 81I, the Planning Board
provides this report relative to the two streets proposed for acceptance as public ways at the 2019
annual town meeting.
The Board voted on January 28, 2019 to submit an article into the annual town meeting warrant
recommending acceptance of the following public ways:
Hunters Ridge Way
Penny Meadow Lane
Information on each of the roads and the subdivision plans that created them is below.
Hunters Ridge Way – Hunters Ridge subdivision
The Hunters Ridge subdivision was approved by the Planning Board in 2013. Construction
began shortly thereafter and all of the infrastructure shown on the approved plan has been
completed. The Planning Board currently holds a $159,162.00 performance guarantee. The
Board’s consulting engineer inspected the subdivision and reviewed the as-built plan. He
concluded that one of the pipes near a detention basin is larger than shown on the approved plan,
but it should not be an issue. The developer understands that they will be required to perform
site cleanup prior to town meeting.
The road is 1,094 feet long and serves 19 lots. In accordance with the Board’s subdivision
approval, the homeowners association is responsible for maintaining the stormwater
management infrastructure.
Penny Meadow Lane – Penny Meadow Lane subdivision
The Penny Meadow Lane subdivision was approved by the Planning Board in 2014. Board
members may recall that prior to the approval of the subdivision plan, “Penny Meadow Lane”
existed as a common driveway, and there was concern as to its maintenance and whether it was a
Town responsibility. The present developer purchased the property and adjacent land, and
proposed the design and construction of the new roadway, generally in the same location as the
previous common driveway. The Board’s consulting engineer has inspected the road
construction and reviewed the as-built plan. Two items were identified as outstanding, and it is
anticipated that these will be resolved prior to the town meeting vote.
There is 1,145 feet of roadway serving 4 new lots, plus the homes which pre-dated the
subdivision plan. The Board holds a $66,862.00 performance guarantee.
Please contact me if you have any questions or need additional information.
Sincerely,
Muriel Kramer
Chair
February 21, 2019
Ms. Cobi Wallace
Land Use, Planning and Permitting
18 Main Street
Hopkinton, MA. 01748
RE: Hunter’s Ridge As-built Review.
Dear Ms. Wallace:
This confirms our receipt of the as-built plans for the above subdivision that was
prepared by Precision Land Surveying, Inc. dated 10/19/18. After conducting a
site visit and a careful review of the roadway as-built drawings inclusive of the
layout, grades, profiles, controls, etc. and site appurtenances (drainage system,
detention pond, etc.), it is our opinion that the items were correctly installed.
The only deviation that was noted on the plans (and confirmed at the site) is the
substitution of an 18” pipe for the 15” size that was originally proposed under the
spillway for basin #3. It appears however that this oversizing of the pipe will not
affect the hydraulic performance of the system.
If you have any questions, feel free to call us at (781)724-4214.
Respectfully submitted,
Luckner Bayas, PE
HOPKINTON PLANNING BOARD
CONSTRUCTION OBSERVATION REPORT
Penny Meadow Lane
1 of 5
Report No.:6168 - 04 Date:Tuesday, 2/5/2019 Arrive:12:15 PM
Observer:Bob Lamro, Sr. Res. Rer.Weather:Mostly Sunny ~56 Leave 1:40 PM
Owner:South Mill Street, LLC
P.O. Box 152
Site
Contractor:
N/A
Hopkinton, MA 01748
Items Observed:As-built review
OBSERVATIONS
Observation Requested By:Town of Hopkinton Planning Department
Met/walked site with: NA
Current Activity on Site:none
Observed Construction:
BETA was on site to observe completed work to verify accuracy of submitted as-built plans. Utilizing the
Approved subdivision Plans as a reference in conjunction with field observations and recorded dimensions, the
following conclusions were confirmed:
•Top course pavement was observed in place to the appropriate width and as depicted on the Approved
Plans. The width of pavement was measured at several locations to verify compliance with the plans.
•All driveway culverts crossings were found to be in place and in accordance with the Approved Plans for
pipe diameter, type, associated flared end section, and rip rap.
•Drainage swales and check damns were observed in place and working as intended.
•Small detention area on the south side of the cul-de-sac was in place with associated rip rap.
•Several granite bounds were found in place as depicted on the plans. However, due to snow and ice
several bounds could not be located.
•The water quality swale along the south side of the entrance at South Mill Street and 12” driveway
culvert were also observed to be in place, working as intended and in accordance with the Approved
Plans.
•The driveway culvert crossing installed adjacent to the interior roadway intersection at STA 4+25± was
observed in place. However, the 10” DI pipe does not conform to the 12” pipe depicted on the Approved
Plan set.
•The as-built between sta. 1+55± to 2+25± depicts the pavement extending as much a two feet onto the
abutting lot.
Penny Meadow Lane
Site Observation Report No. 4
February 5, 2019
2 of 5
Site Photos
Entrance to Penny Meadow Lane
Penny Meadow Lane
Site Observation Report No. 4
February 5, 2019
3 of 5
Swale along north side of Penny Meadow Lane leading to roadway culvert crossing
10” DI roadway culvert outlet pipe on east side of Penny Meadow Lane
Penny Meadow Lane
Site Observation Report No. 4
February 5, 2019
4 of 5
Swale leading to small detention area on south side of cul-de-sac
Granite bound located adjacent to the roadway culvert inlet
Penny Meadow Lane
Site Observation Report No. 4
February 5, 2019
5 of 5
Swale with several stone check damns in place
3/5/2019 Town of Hopkinton, MA Mail - Penny Meadow Lane
https://mail.google.com/mail/u/0?ik=dbd2da471e&view=pt&search=all&permthid=thread-a%3Ar-6124777308522258711&simpl=msg-a%3Ar-31561854…1/2
Elaine Lazarus <elainel@hopkintonma.gov>
Penny Meadow Lane
2 messages
Elaine Lazarus <elainel@hopkintonma.gov>Fri, Feb 15, 2019 at 8:55 AM
To: John Westerling <jwesterling@hopkintonma.gov>, Mike Mansir <mikemansir@hopkintonma.gov>
John,
I have attached BETA's review of the Penny Meadow as-built plan. One of the items identified as
different from the approved plan was the diameter of a pipe under a driveway. I have also attached the
developer's engineering analysis of the pipe diameter, in response.
You should be getting a call from Chris Nation directly to talk about the pavement off the right of way
issue raised in the inspection report.
Elaine
--
Elaine C. Lazarus
Director of Land Use and Town Operations
Town of Hopkinton
18 Main St.
Hopkinton, MA 01748
508-497-9700
2 attachments
Penny Meadow Lane - BETA Observation Report No 4 (2-6-19).pdf
1713K
Pipe analysis.pdf
43K
John Westerling <jwesterling@hopkintonma.gov>Thu, Feb 28, 2019 at 10:17 AM
To: Elaine Lazarus <elainel@hopkintonma.gov>
Elaine
I just met with Chris Nation. He will measure the pavement and if it is able to be cut and still maintain the
minimum 18' width then he will cut it. If it will be narrower than 18" then he will secure an easement.
I explained to him that it has to be addressed because the abutter will know that the Town is encroaching
and may require us to remove the pavement ($$$) or require us to secure an easement ($$$).
Thank you.
Sincerely,
John K. Westerling, MPA
Director of Public Works, Hopkinton DPW
Past-President, New England American Public Works Association
3/5/2019 Town of Hopkinton, MA Mail - Penny Meadow Lane
https://mail.google.com/mail/u/0?ik=dbd2da471e&view=pt&search=all&permthid=thread-a%3Ar-6124777308522258711&simpl=msg-a%3Ar-31561854…2/2
83 Wood Street
PO Box 209
Hopkinton, MA 01748
Email: jwesterling@hopkintonma.gov
Phone: 508-497-9740
Fax: 508-497-9761
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102K
TRANSPORTATION MONITORING REPORT
77 West Main Marketplace
1 Lumber Street
Hopkinton, Massachusetts
Prepared For:
REC Hopkinton, LLC.
77 West Main Street, Suite 213
Hopkinton, MA 01748
Prepared By:
MDM Transportation Consultants, Inc.
28 Lord Road, Suite 280
Marlborough, MA 01752
February 2019
MDM
TRANSPORTATION CONSULTANTS, INC.
Planners & Engineers
FEBRUARY 2019 MONITORING REPORT – 77 WEST MAIN STREET, HOPKINTON, MA
MDM
G:\Projects\1020 - Hopkinton (77 Main Monitoring)\Documents\1020 MR02-Monitoring-Final.doc
1
INTRODUCTION
MDM Transportation Consultants, Inc. (MDM) has conducted transportation monitoring for
77 West Main Marketplace development located at 1 Lumber Street in Hopkinton,
Massachusetts. The location of the Site and study intersection relative to the adjacent roadway
network is shown in Figure 1. This analysis has been prepared in accordance with the Town of
Hopkinton Planning Board’s Master Plan Special Permit (MPSP) Decision Condition #31 dated
March 26, 2015 for the neighborhood Mixed-Use Development (NMU) and Decision of Site Plan
Review for 77 West Main Marketplace dated July 16, 2015. For reference, copies of the
Decisions are provided in the Appendix and Condition #31 reads as follows:
“It is anticipated that the residential development on Lot 2 will provide a vehicular connection to the
existing commercial development at 77 West Main Street. If the connection is made, the Applicant
shall be responsible for submitting, one year following the final Certificate of Occupancy within the
Development Project on Lot 2; an analysis of whether left turns into or out of the 77 West Main
Street driveway on West Main Street should be restricted... If, at any time, regardless of the outcome
of such analysis, the Town recommends that left turns in that location shall be restricted, the
Applicant shall be responsible for the installation and maintenance of signage to that effect and shall
promptly implement said restrictions.”
A review of local crash records, traffic volumes, and existing operations (capacity analysis)
indicates that no additional mitigation or restrictions are warranted given the existing operating
characteristics of the intersection of West Main Street/77 West Main Street driveway. The
existing “No Left Turn” signs that restrict left turn egress onto West Main Street should remain
in place.
PROJECT DESCRIPTION
77 West Main Marketplace is comprised of a 32,455± gross square foot (sf) building which
includes a 4,014 leasable square feet of retail, 7,567 leasable square feet of restaurant space (210
seats), and 5,757 leasable square feet of medical office space, and 10,647 leasable square feet of
second floor office space. The Site is fully built-out and leased. Approximately 161 marked
parking spaces are provided on the Site, which serve as shared parking for the various tenants.
Access/egress to 77 West Main Marketplace utilizes the two driveways for adjacent 77 West
Main Street development with one driveway along Lumber Street and one driveway along
West Main Street. The development also has two driveways along the Hopkinton Mews
driveway, which is located along Lumber Street approximately 500 feet south of West Main
Street.
FEBRUARY 2019 MONITORING REPORT – 77 WEST MAIN STREET, HOPKINTON, MA
MDM
G:\Projects\1020 - Hopkinton (77 Main Monitoring)\Documents\1020 MR02-Monitoring-Final.doc
2
STUDY AREA
Per the conditions of approval, the study area for this traffic monitoring report includes the
unsignalized intersection of West Main Street at 77 West Main Street. To provide context to
area operations and queue impacts the adjacent signalized intersection of West Main Street at
Lumber Street is included in traffic volume and capacity analysis sections of this study. The
study intersections are shown in Figure 1.
EXISTING TRAFFIC CHARACTERISTICS
An overview of existing roadway conditions and traffic volumes are provided below.
West Main Street
West Main Street is generally an east-west roadway under local jurisdiction within the study
area. West Main Street is classified by the Massachusetts Department of Transportation
(MassDOT) as an Urban Minor Arterial roadway and provides a connection between Interstate
495 (via Exit 21) and the Upton town line and Route 135 in Hopkinton. Sidewalks are provided
along both sides of West Main Street at its intersection with the 77 West Main Street driveway.
The posted (regulatory) speed limit on West Main Street in the immediate study area is 40 miles
per hour (mph). Land use along West Main Street in the study area is a mix of residential,
commercial, and medical office uses.
West Main Street at 77 West Main Street Driveway
West Main Street meets the driveway for #77 West Main Street to form a three-legged,
unsignalized intersection under local jurisdiction. The West Main Street eastbound approach is
a single lane approach, the West Main Street westbound approach includes an exclusive left
turn lane and two through travel lanes, and #77 West Main Street Driveway is a single lane
approach under STOP sign control. The #77 West Main Street Driveway is signed to restrict
left-turns out onto West Main Street. Land uses at the intersection include a commercial plaza,
a Dunkin Donuts, and a medical office building.
Baseline Traffic Data
Peak Hour Traffic
Traffic volume data was collected at the study area intersection in January 2019 during the
weekday morning (7:00 AM – 9:00 AM), weekday evening (4:00 PM – 6:00 PM), and Saturday
midday (11:00AM – 2:00 PM) periods to coincide with peak traffic activity of the adjacent
streets. MDM reviewed MassDOT permanent count station data which indicates that January is
a below average traffic month (approximately 7 percent below average month conditions). An
adjustment (7% increase) was made to the traffic counts to represent average conditions. The
Baseline weekday morning, weekday evening, and Saturday midday peak hour traffic volumes
for the study intersections are shown in Figure 2. Turning movement counts and permanent
count station data are provided in the Appendix.
FEBRUARY 2019 MONITORING REPORT – 77 WEST MAIN STREET, HOPKINTON, MA
MDM
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3
As shown in Figure 2:
□ Left-Turns In. The number of left turns entering the 77 West Main Street Driveway from
the east was observed to be 46 vehicles per hour (vpd) or less during the peak hours, a
level that represents less than 1 vehicle per minute.
□ Left-Turns Out. The number of left turns exiting the 77 West Main Street Driveway onto
West Main Street westbound (a restricted movement) was nominal during the peak
hours.
In summary, review of turning movement counts for the driveway indicates a manageable
number of left turns entering the driveway (less than 1 per minute) with only a nominal number
of left-turns exiting the driveway.
Daily Traffic Counts
Daily traffic volumes along West Main Street to the west of Whalen Road were collected in
January 2019 using a video automatic traffic recorder (ATR) device with results summarized in
Table 1.
TABLE 1
ROADWAY TRAFFIC-VOLUME SUMMARY
WEST MAIN STREET WEST OF WHALEN ROAD
Time Period
Daily
Volume (vpd)1
Percent
Daily Traffic2
Peak Hour
Volume (vph)3
Peak Flow
Direction4
Peak Hour
Directional
Volume (vph)
Weekday Morning Peak Hour 16,990 8% 1,360 52% EB 705
Weekday Evening Peak Hour 16,990 8% 1,385 53% WB 731
Saturday Midday Peak Hour 14,005 8% 1,175 51% EB 600
1Two-way daily traffic expressed in vehicles per day without seasonal adjustment.
2Two-way peak-hour volume expressed in vehicles per hour.
3The percent of daily traffic that occurs during the peak hour.
4EB = Eastbound, WB = Westbound
As summarized in Table 1, West Main Street to the west of Whalen Road carries approximately
16,990 vehicles per day (vpd) on weekdays and 14,005 vpd on Saturdays. Peak hour traffic flow
on West Main Street is approximately 8 percent of the daily flow with directional flow slightly
skewed eastbound during the weekday morning peak hour and slightly skewed westbound
during both the weekday evening peak hour and Saturday midday peak hour. The Saturday
traffic volumes along West Main Street are approximately 18 percent less than during a
weekday.
FEBRUARY 2019 MONITORING REPORT – 77 WEST MAIN STREET, HOPKINTON, MA
MDM
G:\Projects\1020 - Hopkinton (77 Main Monitoring)\Documents\1020 MR02-Monitoring-Final.doc
4
Intersection Crash History
In order to identify crash trends and safety characteristics for study area intersections, crash
data were obtained from local police department records for the Town of Hopkinton. A crash
rate was determined for the intersection. This rate quantifies the number of crashes per million
entering vehicles. MassDOT has determined the crash rate within the District 3 area (which
includes the Town of Hopkinton) to be 0.61 for unsignalized intersections. This rate represents
MassDOT’s “average” crash experience for District 3 communities and serves as a basis for
comparing reported crash rates for the study intersection. Where calculated crash rates notably
exceed the district average, some form of safety countermeasures may be warranted. In
addition, review of the MassDOT high crash cluster mapping was conducted to determine
locations listed as eligible for Highway Safety Improvement Program (HSIP) evaluation and
funding.
Hopkinton Police Department Crash Records
Crash records for the study location were obtained from the Hopkinton Police Department for
the period covering January 1, 2014 through January 30, 2019. The local police crash data are
indicative of current safety trends at the study location, covering the period of time prior to the
opening of the 77 West Main Marketplace through the occupancy of 77 West Main Marketplace
and implementation of project-related roadway improvements along West Main Street
(completed August 2016). The local police department crash data is summarized in Table 2 and
shown in a collision diagram (Figure 3) for the intersection of West Main Street/77 West Main
Street driveway. The Appendix includes crash rate calculations based on Hopkinton Police
Department crash records.
Crash
(#)
Date
Day of Week
Time of
Day
Collision
(Type)
Roadway
Lighting
Weather
Conditions
Roadway
Conditions Severity Comments
1 January 6, 2016 Wednesday 18:13 Rear‐End Dark Clear Dry Property Damage Only Vehicle 1 traveling EB stopped for traffic, vehicle 2
was also traveling EB and struck back of vehicle 1
2 May 31, 2016 Tuesday 9:55 Rear‐End Daylight Clear Dry Property Damage Only Vehicle 1 traveling EB stopped to let another vehicle
traveling WB to turn left into 77 West Main Street
driveway, vehicle 2 was also traveling EB and struck
back of vehicle 1
3 June 7, 2017 Wednesday 6:57 Rear‐End Daylight Clear Wet Property Damage Only Vehicle 1 traveling EB stopped for traffic, vehicle 2
was also traveling EB and struck back of vehicle 1
4 June 7, 2017 Wednesday 7:13 Rear‐End Daylight Cloudy Wet Property Damage Only Vehicle 1 traveling EB stopped for traffic, vehicle 2
was also traveling EB and struck back of vehicle 1
5 October 5, 2017 Thursday 18:16 Angle Daylight Clear Dry Personal Injury Vehicle 1 (motorcycle) traveling EB , vehicle 2 was
traveling WB and turned left int 77 West Main St.
driveway, in front of Vehicle 1
6 December 11, 2017 Monday 6:46 Rear‐End Dawn Clear Dry Property Damage Only Vehicle 1 traveling EB stopped for a school bus,
vehicle 3 was also traveling EB and struck back of
vehicle 2, which then struck vehicle 1
MAY 2017 MONITORING REPORT – 77 WEST MAIN STREET, HOPKINTON, MA
MDM
G:\Projects\1020 - Hopkinton (77 Main Monitoring)\Documents\1020 MR02-Monitoring-Final.doc
5
TABLE 2
INTERSECTION CRASH SUMMARY
POLICE DEPARTMENT RECORDS – JANUARY 1, 2014 THROUGH JANUARY 30, 2019
Data Category
West Main Street at
#77 West Main Street Driveway
Traffic Control Unsignalized
Crash Rate2 0.17
District Average 0.61
Year:
2014 0
2015 0
2016 2
2017 4
2018 0
20193 0
Total 6
Type:
Angle 1
Rear-End 5
Head-On 0
Sideswipe 0
Single Vehicle 0
Unknown/Other 0
Severity:
P. Damage Only 5
Personal Injury 1
Fatality 0
Conditions:
Dry 4
Wet 2
Snow 0
Unknown 0
Time:
7:00 to 9:00 AM 1
4:00 to 6:00 PM 0
Rest of Day 5
1Source: Town of Hopkinton Police Department
2Crashes per million entering vehicles (MEV).
3Year 2019 analysis includes January.
FEBRUARY 2019 MONITORING REPORT – 77 WEST MAIN STREET, HOPKINTON, MA
MDM
G:\Projects\1020 - Hopkinton (77 Main Monitoring)\Documents\1020 MR02-Monitoring-Final.doc
6
As summarized in Table 2 and Figure 3, six (6) crashes were reported at or near the
unsignalized intersection of West Main Street/77 West Main Street driveway over the study
period resulting crash rate of 0.17, which is well below the District 3 average of 0.61. Two (2) of
the crashed included movements into the 77 West Main Street driveway from the east; one of
the crashes was a rear-end type collision and the other was an angle type collision. The
remaining four (4) crashes were rear-end type collisions between vehicles traveling in the
eastbound direction due to cars stopping or stopped for traffic to the east of the 77 West Main
Street driveway. The majority of the crashes (83%) resulted in property damage type collisions,
under dry roadway conditions (67%). No fatalities or pedestrian-related incidents were
reported during the study period and the intersection is not located within an HSIP cluster.
In summary, based on extensive review of Local crash data, the study intersection of West Main
Street/77 West Main Street experienced a crash rate that is below the MassDOT District 3
average and the intersection is not listed as an HSIP location. No additional safety
countermeasures are warranted based on the review of the crash records and associated crash
rates.
OPERATIONS ANALYSIS
This section provides an overview of operational analysis methodology, an assessment of traffic
operations under actual existing conditions with the 1 Lumber Street mixed-used development
in place.
Analysis Methodology
Intersection capacity analyses are presented in this section for the Existing traffic-volume
conditions. Capacity analyses, conducted in accordance with EEA/MassDOT guidelines,
provide an index of how well the roadway facilities serve the traffic demands placed upon
them. The operational results provide the basis for recommended access and roadway
improvements in the following section.
Capacity analysis of intersections is developed using the Synchro® computer software, which
implements the methods of the Highway Capacity Manual (HCM). The resulting analysis
presents a level-of-service (LOS) designation for individual intersection movements. The LOS is
a letter designation that provides a qualitative measure of operating conditions based on several
factors including roadway geometry, speeds, ambient traffic volumes, traffic controls, and
driver characteristics. Since the LOS of a traffic facility is a function of the traffic flows placed
upon it, such a facility may operate at a wide range of LOS, depending on the time of day, day
of week, or period of year. A range of six levels of service are defined on the basis of average
delay, ranging from LOS A (the least delay) to LOS F (delays greater than 50 seconds for
unsignalized movements and delay greater than 8 seconds for signalized movements). The
specific control delays and associated LOS designations are presented in the Appendix.
FEBRUARY 2019 MONITORING REPORT – 77 WEST MAIN STREET, HOPKINTON, MA
MDM
G:\Projects\1020 - Hopkinton (77 Main Monitoring)\Documents\1020 MR02-Monitoring-Final.doc
7
Analysis Results
Level-of-Service (LOS) analyses were conducted for Existing conditions for the study
intersections. The results of the intersection capacity analysis are summarized below in Table 3.
Detailed analysis results are presented in the Appendix.
TABLE 3
INTERSECTION CAPACITY ANALYSIS RESULTS
2019 EXISTING CONDITIONS
Weekday AM
Peak Hour
Weekday PM
Peak Hour
Saturday
Midday Peak Hour
Approach v/c1 LOS2 Delay3 v/c1 LOS2 Delay3 v/c1 LOS2 Delay3
West Main Street at Lumber Street
Eastbound
Westbound
Northbound
Southbound
OVERALL
0.90
0.62
0.67
0.29
0.90
C
C
C
A
B
22
21
27
7
20
0.69
0.63
0.60
0.52
0.69
B
C
C
B
B
14
21
27
14
17
0.65
0.50
0.57
0.18
0.65
B
B
B
A
B
11
16
20
6
13
West Main Street at 77 West Main Street
Eastbound
Westbound
WB L Enter
NB R Exit4
0.00
0.00
0.03
0.05
A
A
A
B
<5
<5
10
15
0.00
0.00
0.05
0.13
A
A
A
B
<5
<5
9
14
0.00
0.00
0.06
0.14
A
A
A
B
<5
<5
9
14
1Volume-to-capacity ratio
2Level of service
3Average stopped delay per vehicle (in seconds)
4The delay includes a nominal number left turn movements onto West Main Street during the peak hours, which are restricted.
As summarized in Table 3,
□ West Main Street at Lumber Street. The observed (existing conditions) operations at the
signalized intersection of West Main Street and Lumber Street remains consistent or
better than the projected operations outlined during the permitting process. Specifically,
the intersection is currently operating at an overall level of service (LOS) B or better
during the peak hours. Likewise, all approaches remain well below capacity at LOS C or
better. A review of the detailed queue results indicates that the queuing on the
westbound approach to the signalized intersection generally has no impact at the 77
West Main Street Driveway.
□ West Main Street at 77 West Main Street. The 77 West Main Street Driveway approach to
West Main Street operates at LOS B or better during the peak hours. Mainline travel
along West Main Street operates unimpeded and left turns entering the driveway
operate with minor delay (LOS A) during the peak hours.
FEBRUARY 2019 MONITORING REPORT – 77 WEST MAIN STREET, HOPKINTON, MA
MDM
G:\Projects\1020 - Hopkinton (77 Main Monitoring)\Documents\1020 MR02-Monitoring-Final.doc
8
CONCLUSIONS AND RECOMMENDATIONS
In summary, the number of left turns entering the 77 West Main Street Driveway from the east
was observed to be 46 vehicles per hour (vpd) or less during the peak hours, a level that
represents less than 1 vehicle per minute. The number of left turns exiting the 77 West Main
Street Driveway onto West Main Street westbound (a restricted movement) was nominal during
the peak hours. With the build-out of the 77 West Main Street Marketplace (1 Lumber Street)
project in place, the 77 West Main Street driveway approach to West Main Street operates with
minor delays at LOS B or better during the peak hours. Mainline traffic along West Main Street
operates unimpeded; left-turn movements into the 77 West Main Street driveway are
accommodated outside of the westbound through lane with no evident influence on through
traffic flow. A review of local police department crash data indicates that no additional safety
countermeasures are warranted based on the type and number of crashes at the unsignalized
intersection. Furthermore, there have been no reported crashes at the West Main Street/77 West
Main Street driveway since 2017.
In conclusion, no additional mitigation or restrictions are warranted given the existing
operating characteristics of the intersection of West Main Street/77 West Main Street driveway.
The existing “No Left Turn” signs that restrict left turn egress onto West Main Street should
remain in place.