2019-04-22-CONCOM-min - Laserfiche WebLink

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is proposed in the southwest corner of the house where all stormwater runoff will be directed. A trench drain is located in the driveway. Mr. Langseth inquired about the possible directions of waterflow. Mr. Kirby stated that they will review the proposed Swale. An abutter, Mr. Der Avedisian, located at 481 Lowell Street, asked what happens when the stormwater management system fails. Mr. Der Avedisian stated that the neighboring properties which were recently developed all installed infiltration systems which failed over the first year of occupancy. The infiltration systems were removed over time. The current owners use sump pumps. The abutter stated that the property owners presented before a Lexington board or committee. The water at the surrounding addresses flow onto his driveway. Mr. Kirby stated that since this specific property had to present before the Conservation Commission, this specific infiltration system had to abide by the Town of Lexington stormwater standards which has been approved by the Town's engineering department. The Commission asked the Conservation Department to investigate the area. On a motion by Mr. Beuttell and seconded by Ms. Dohan, the Commission voted 5-0 to close the hearing. 7:16pm DEP 201-1131 BL 1088 NOI, 39 Sherburne Road Applicant: Leyne & Shannon, Inc. Project: Raze and Rebuild of a single family dwelling within the 100-foot Buffer Zone Documents Received: NOI application/plans/drainage (4-3-2019), Engineering Memo (4/11/2019) Mr. Brendan Leyne presented before the Commission. Mr. Leyne was before the Commission as a requirement to file a new notice of intent for the changes during construction at 39 Sherburne Road. The new notice of intent is based on the final as-built plot plan. Mr. Leyne stated that as a result of the changes a larger infiltration system was installed. Chairman Hamilton reminded the applicant that if a future owner wishes to add another or different sump pump, they will need to come before the Commission. This should be explicitly stated in the Order of Conditions because the infiltration system cannot handle a larger sump pump than the existing one. On a motion by Mr. Langseth and seconded by Mr. Beuttell, the Commission voted 5-0 to close the hearing. 7:25pm