2021-04-26-CONCOM-min - Laserfiche WebLink

Browse Search

Project: Kiln Brook culvert daylighting. An existing 36" RCP drain pipe that discharges to Kiln Brook will be converted to an open stream channel, including a stone lined channel, native vegetation plantings, a vegetated retaining wall, and an 8'x4' box culvert. Previous Meeting Dates: 3/29/2021, 4/12/2021 Supplemental Documentation: None Prior to the meeting, DEP issued a filing number for the ecological restoration and also provided a list of questions for the applicant to follow up on. The consulting team did not yet have the time to submit a formal response to DEP and went over the list of questions and responses with the Conservation Commission. Responses from the Representatives: • Invasive species management will include maintenance over the years and will be the responsibility of the DPW covered under existing policies and procedures. • Currently running a model to evaluate downstream impacts further than 300 feet. • Will keep the 10-year storm within the banks of the channel. Mr. Varoujan stated that he observed the area multiple times during multiple seasons and did not witness a high groundwater level. He added that a high ground water would be good to vegetate and nourish the new species community. • Not creating any new impervious area and providing a small sediment trap. • No formal trash racks are being proposed but do have a grate that will go over the outlet; however, it is not meant for trash. Any waste will move through the channel just as it does today. • The channel geometry was determined by existing drainage easement and, due to being between private properties, there just isn't the space to meander the channels. • Converting the concrete pipe to an open channel will provide growth for aquatic wildlife and a natural habitat over time. • There is a safety fence to prevent downhill access. There is a steep slope, however only in a limited area and there is plenty of room for wildlife to navigate the area. On a motion by Mr. Langseth and seconded by Ms. Ladd, the Commission voted 7-0 by roll call vote to continue the hearing to the May 10, 2021 meeting at the applicant's request. Record of vote as follows: Duke Bitsko —Aye Kevin Beuttell—Aye Alex Dohan—Aye Ruth Ladd—Aye David Langseth—Aye Holly Samuels —Aye Phil Hamilton—Aye 7:44 PM ViewPoint Cloud Permit# CDOA-21-1