2000-05-23-CONCOM-min.pdf - Laserfiche WebLink

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Minutes Lexington Conservation Commission 5/23/00 Page 3 CONT'D HEARING, Winning Farm, Winning Farm Trust, 4-lot subdivision/roadway 8:50 pm 201-441 to 445 Mrs. Miller read a letter from the applicant requesting a continuation to the June 20th meeting. Therefore, it was moved, seconded and voted to continue the hearing to June 20, 2000. CONT'D DET #00-4, 35 Haves Lane, P Johnson, drainage/single-family house and street widening Mrs. Miller read a memo from the representative requesting a continuation of the public hearing for 35 Hayes Lane to August 8. Therefore, it was moved, seconded and voted to continue the hearing to August 8, 2000. CONT'D HEARING, Old Smith Farm, 160/170 Wood Street, Wood St. R.T 9 pm 201-457 Present: Fred Russell, engineer/representative; Jim Gaklis, Wood St. R.T Mr Russell explained this is a continuation of the hearing held last October. During the last four months they have been working with the Engineering Department to overcome their concerns regarding the drainage system. With the final plan there will be a reduction in the amount of flow and volume from the existing conditions. All concerns previously raised by the Commission have been addressed. The Planning Board conditionally approved this project with a plan to fill the depression to meet their standards of a depth of no more than four feet. This will require filling five to six feet of the depression. To compensate for the flood storage, a subsurface infiltration system will be installed under the fill in the basin. In addition, other detention units are sited at other locations. The depth of the water in the depression during a 100-year storm will now be three plus feet. Additional information provided in response to the Comission's questions includes: the slope of the depression will be graded at 3 1 and will be sodded immediately to prevent erosion; the existing cedar trees around the depression will be protected except in the area where equipment will be brought in to work in the depression; stormwater in the depression from a 100-year storm should dissipate in three to four hours, if it does not,this would be an indication that the system was not functioning properly; grading will direct the runoff from the western most slope around the back of the proposed houses and into the detention basin; and the rate and the volume of runoff from the site will be reduced and for the most part existing flow patterns will be maintained. A major concern of the Commission was maintenance of the drainage system. Mr Russell said that overflow on the site would signal a failure in the system. Mr. Gaklis said that the development will be condominiums and the association would be responsible for the roads and the drainage system. The Commission directed that conditions must be included in the Order that require the developers to develop a maintenance plan,to be approved by the Commission, and that the owners will be required to maintain the system and keep records of the systems inspections and maintenance for six years. This maintenance requirement is to continue in perpetuity There should be a condition, that occupancy is not permitted until the drainage