Swale Detail.pdf

This is a technical specification document for stormwater management infrastructure related to the Comstock Bridge Parking Lot Paving project under the Connecticut Department of Energy and Environmental Protection (DEEP). The document provides detailed engineering specifications for a dry swale detail with underdrain system designed to manage stormwater runoff from the parking lot improvement project. The swale specifications include a maximum ponding depth of 36 inches during 10-year storm events, with a longitudinal midpoint depth of 18 inches tapering to 12 inches at the downstream end. The design incorporates a 30-linear-foot perforated 6-inch HDPE underdrain sloped from north to south, 2:1 side slopes, native grass or plant vegetation with optional river stone or smooth crushed stone surfacing, and a minimum 24-inch separation to seasonal high water table or bedrock. The swale bottom width varies based on the adjacent roadway, and the system utilizes non-woven filter fabric complying with Connecticut Department of Transportation Standard Specifications M.08.01.19 for drainage geotextiles, with filter fabric applied to excavation sides only and supplemented with 2-3 inches of crushed stone and 1/2-inch drainage stone.

No additional information regarding pricing, contract terms, bid due dates, site visits, or other contractual details is provided in this technical specification document. This appears to be a supporting exhibit or standard detail drawing referenced within the larger scope of work for the parking lot paving project.