2016-01-11-CONCOM-min - Laserfiche WebLink

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Project: School addition and associated site appurtenances Ken DiNisco- architect, Fred King- Wetlands Scientist Documents: NOI package 12/22/2015, Plans 12/22/2015, Stormwater Management 12/22/2015, Presentation 1/11/2016, Engineering Report 1/11/2016 Mr. King stated that this is a more environmentally sensitive site compared to the Diamond School. He explained that Clematis Brook runs through the middle of the site and there are other wetlands surrounding the school and property. The site also contains bordering land subject to flooding. The first part of the project would involve creating a new entry plaza that is further from the wetland. The second part would be to create a school bus loop for drop off. Additionally, the parking alongside the road will be moved to a newly created parking lot in the former location of the tennis courts. For mitigation for this work, the applicant explained that they plan to do wetland restoration, stormwater management, and create a new footbridge over a proposed day-lighted stream. The stormwater management system will rely on the existing stormwater system along with some updated features. The new features include a recharge system, a bio-retention system for the parking lot, deep sump catch basins, and improvements to the end pipes. Over all, Mr. King said the peak flow volumes are being reduced and the volume is being reduced because of the recharging system. Mr. King and Mr. DiNisco explained that daylighting of the stream and the proper stream crossing will mitigate for the new parking lot. They also added that the grading in the parking lot provides more flood storage than previously so there is no need for a compensatory chamber. Questions and comments from the commission: Mr. Hamilton entered the engineering report into the record. The commission stated that they had many of the same concerns that they had regarding the Diamond School. The commission asked for more detail regarding the bridge as mitigation. The commission requested a statement as to why there is a need for encroachment into the inner riparian zone. The commission requested a summary of all of the resource area impacts along with the appropriate mitigation. The commission asked for more detail regarding the water that was discharging into the brook. Motion to continue the hearing to January 25, 2016 at the applicant’s request made by Mrs. Miller and seconded by Mr. Wolk. Vote: 5-0 in favor.