DPW Comments Major Site_PBMEMORANDUM
TO: George Kohout, Chair, Plan oa
FR: David K. Veleta, P.E., City, ngineer,
DA: October 26, 2022
RE: File: 737 Bridge Road — Change of Use to 60 Affordable Apartments — Major Site
Plan
Map ID: 18C-048
CC: file
The Department of Public Works has reviewed the above referenced application for the following items:
Traffic: Utilities:
x Volume & Impact on City Street
x Roadway Capacity
x Adequacy of City Road Construction
x Site Distances
x Parking
x Driveway Openings
x Sanitary Sewer
x Water
x Drainage Into City Stormwater System
x Capacity of Stormwater Line
x Northampton Stormwater Permit
NPDES Phase II Compliance
x Other:
The Department of Public Works has the following comments:
No Concerns, project will not have an impact on any items reviewed
Traffic Study is required
Roadway does not have adequate capacity to handle the additional traffic
Roadway is not adequately constructed to handle proposed increase in traffic
Site Distances are not adequate for proposed project
Parking spaces do not meet minimum requirements
Parking spaces are too close to driveway opening
Driveway openings are not adequate for proposed use
Sanitary Sewer line is not adequately sized for proposed use
Sewer line connection is not properly shown
Water line is not adequately sized for proposed use
Water line connection is not properly shown
City stormwater system is not adequate to handle increase in drainage
Stormwater system does not meet minimum requirements for reduction of Total
Suspended Solids (TSS)
Northampton Stormwater Management Permit has not been approved or conditions for
approved permit have not been met
Other Comments:
General
• These review comments are based on the following:
o A Permit application dated September 26, 2022;
o Traffic analysis and generation report, dated June 10, 2022, prepared by Stantec;
0737 Bridge Road_Major Site_PB.doc Page 1 of 3
o Site permit review set, consisting of 17 sheets, dated September 23, 2022 and
revised October 10, 2022, prepared Stonefield Engineering. The Civil sheets are
not stamped by a Massachusetts Registered Professional Engineer. The
Landscape sheets are stamped by Rachael Loeffler, a Massachusetts Professional
Registered Landscape Architect. Revised Civil plans dated October 25, 2022
consisting of 11 sheets, stamped by Jake Modestow, P.E. registered in
Massachusetts.
• Based on the comments below and any conditions required by a Planning permit
approval, the applicant shall submit revised final construction plans, signed and sealed by
a Massachusetts registered P.E., to the DPW for review and approval at least 15 days
prior to the issuance of any City building or construction permits.
Sheet C-3 — Site Plan
The plan proposes new concrete sidewalk cast against existing and proposed bituminous
curb along the entire frontage of Prospect Avenue and a portion of Hatfield Street
associated with the relocated entrance, respectively. Concrete sidewalk cannot be cast
against bituminous curb since the geometry of the curb will create a fragile edge subject
to deterioration. Alternatives include:
o Installation of granite curb in lieu of bituminous curb,
o Installation of bituminous sidewalk in lieu of concrete,
o Offsetting the concrete sidewalk from the bituminous curb by a minimum of 12".
The DPW recommends that the short sidewalk portion to be replaced on Hatfield Street
northerly of the proposed interior concrete sidewalk be replaced with bituminous
sidewalk to match existing. See the comment below regarding the driveway crossing.
The DPW also recommends that, if the sidewalk on Prospect is to be concrete, its street
edge generally align with the street side of the utility poles, providing a minimum of 3
feet of clear passage around them. Encroachment of the sidewalk over the current
property line will require an easement to the City or a roadway layout alteration.
• The applicant should consider providing a crosswalk with accessible ramps from the
proposed sidewalk on Prospect Avenue to the northerly side of Allison Street for
connectivity to Jackson Street School.
• Proposed crosswalk markings across driveways are not appropriate.
• More design and grading details are needed for the sidewalks crossing the entrances. The
sidewalks should maintain elevation across the driveway.
o DPW recommends that the sidewalk crossing on Bridge Road be in line with the
existing sidewalk, not set back as shown.
o DPW recommends that the sidewalk crossing on Hatfield Street be slightly
realigned to be set back from the curb at the driveway crossing and that the
crossing be concrete, extending to the northerly limits of the proposed interior
concrete sidewalk and an equal distance to the south.
• The curb material of the Bridge Road entrance island is not clear. Concrete curb is not
acceptable in the City ROW.
• Pervious pavement is called out for 7 proposed parking spaces, but Detail 7 on sheet C-9
indicates permeable pavers. Please clarify which is proposed.
0737 Bridge Road Major Site PB.doc Page 2 of 3
Sheet C-5 — Stormwater & Utility Plan
• Final construction plans need to specify the water supply location for fire and domestic
service. The primary current location is off Prospect Street with a 6" fire/domestic
service. Any existing services that will not be utilized need to be cut and capped at the
main with a permanent trench patch provided.
Sheets C-8 to C-10 — Details
• The Crosswalk detail is suitable for internal site use only.
• The Flush Curb Detail is confusing. What dimensions are proposed? Please clarify.
• Concrete sidewalk within the City ROW shall have 8" compacted process gravel,
MI. 03. 1, for subbase, not 4" dense graded crushed stone and welded wire mesh shall be
6x6 -W 1.4x W 1.4, not W2.9 x W2.9.
• Asphalt pavement within the City ROW at drive entrances shall have 4" dense graded
crushed stone over 8" processed gravel, not 8" dense graded crushed stone alone.
• The minimum clear height to the bottom of a regulatory sign such as a Stop or Do Not
Enter sign is 84", not 72" as shown.
• The Storm Inlet (Catch Basin) Detail does not provide a sump. Deep sump catch basins
with debris hoods are standard practice to improve stormwater discharge water quality
and should be provided.
• Is the Sewer Connection Detail applicable to this project? If not, please remove.
0737 Bridge Road Major Site PB.doc Page 3 of 3