2021-02-01-CONCOM-min - Laserfiche WebLink

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— Memorandum from Frederick W. Russell, PE, to Scott Seaver, Seaver Construction; RE: 25 Oxbow Road, (Estimated Seasonal High Water Table); Dated 12/9/2020; — "Description of Work"; Prepared by: Mary Trudeau; Not Dated; — Letter from Mary Trudeau to Scott Seaver, Seaver Construction; RE: "25 Oxbow Road, Lexington, MA Wetlands Delineation"; Dated 12/10/2020; — Plot Plan; Prepared by: Keenan Survey; Scale: 1"=20% Dated 12/22/2020; — "National Flood Hazard Layer FIRMette"; Prepared by: FEMA; Scale: 1:6,000; Exported on: 12/10/2020; — "Residential Addition—23 Oxbow Road" (DEP4201-993); Prepared for: Better Built Homes; Prepared by: Howard Stein Hudson; Scale: 1"=20% Dated 7/21/2015 and revised through 9/15/2015; — Stormwater Management Report; Prepared and signed by: Frederick W. Russell, PE Civil No. 36713; Not dated; — WPA Form 3 —Notice of Intent application; Prepared by: Mary Trudeau; Prepared for: Seaver Construction; Signed 1/4/2021; — Site Plan—25 Oxbow Road; Prepared for: Seaver Construction; Prepared by: Frederick W. Russell, PE; Scale: 1"=20' and as noted not to scale; Dated 12/7/2020 and revised 1/3/2021; Ms. Mary Trudeau, Wetland Scientist representing the Applicant, presented before the Commission. After discussions with Ms. Mullins, Ms. Trudeau agreed that there is a 50 foot difference in the wetland delineation lines for the property of 25 Oxbow and the property of 23 Oxbow. The Commission could not make a decision on the wetland delineation due to ice coverage and frozen ground during the time of the site visit. For the purpose of moving the project forward, and not forcing the applicant to wait until spring to determine the wetland boundaries, Ms. Trudeau and the Commission have agreed to use the 2015 23 Oxbow delineation. Due to this, the proposed house is now within the 5 0-100 foot buffer zone and will need to meet the Lexington wetland regulations for stormwater management. Mr. Frederick Russell, Project Engineer, is redesigning the stormwater system to meet the new requirements while also looking at options to minimize tree removal on the lot. Comments from the Commission: — The existing grade has a mild Swale towards the wetland and the revised grading will tend to shed more water towards the property to the south. Would like to see the contouring modified to prevent that additional shedding of water to the abutting property. Response from the Representative: — Modifying the contour to create a Swale and contain runoff on this property will not be a problem. On a motion by Mr. Langseth and seconded by Ms. Ladd, the Commission voted 6-0 by roll call vote to continue the hearing to the February 16, 2021 meeting at the applicant's request. Record of vote as follows: Duke Bitsko —Aye