HomeMy WebLinkAbout11/26/2024 - Peer Review - - 314 SALEM STREET MEMOMRANDUM
To: J. Enright, Town Planner
From: J. Borgesi, P.E., Asst. Public Works Director/Town Engineer
Date: November 26, 2024
Re: 314 Salem Street— Proposed Addition
Watershed Special Permit
As requested, I have reviewed the information submitted for the Watershed Special Permit for 314
Salem Street— Proposed Addition with a revision date of October 14, 2024 prepared by PFS land
Surveying, Inc. More specifically I reviewed the following:
• Stormwater analysis calculations provided for the stormwater leaching catch basin and volume
of runoff to be captured by the roof drain;
• Watershed Special Permit Project Description and Supporting Documentation;
• Stormwater Remediation Site Plan; and
• Stormwater Operation and Maintenance Plan
My comments are as follows:
1. Based on my review the proposed stormwater leaching basin and stone area surrounding the
basin will provide sufficient volume to capture the entire additional porch roof area runoff using
a 1.6 inch/hr rain event.
2. The proposed stormwater leaching basin and stone area included in the stormwater calculations
are a 2-foot diameter basin with 12-inches of stone around the basin and set on a bedding of 2-
feet of stone. However, the project narrative, operation and maintenance narrative, leaching
basin detail, and notes on the site plan all reference a 12-inch layer of stone beneath the
leaching basin. This discrepancy shall be corrected and either the stormwater calculations
updated with a 12-inch bedding layer of stone or the project narrative, operation and
maintenance narrative, leaching basin detail, and notes on the site plan updated to reference a
bedding of 24-inches of stone.
3. Under the supporting documentation in the Watershed Special Permit Project Description and
Supporting Documentation — 2. Preventing Overcrowding of Land a reference is made to a
proposed "pool". This project is for a proposed "porch" addition. This discrepancy shall be
corrected.
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