Attachments.pdf

This document is an informational photo set for the Entrance Drainage Basin project at Mansfield Hollow Dam in Mansfield Center, Connecticut, operated by the U.S. Army Corps of Engineers.

The project addresses stormwater drainage issues at the MHL Visitor Parking lot, where water runoff from the parking area currently flows uncontrolled through a drainage grate and pipe system, causing sediment erosion and vegetation damage in the field in front of Kirby Mill. The proposed solution calls for construction of a 25-foot by 25-foot drainage basin featuring a bowl-shaped rip-rap inner section designed to slow water velocity and moderate the release of stormwater, reducing erosion and environmental impact. The work involves site preparation, excavation to create the bowl-shaped configuration, placement of rip-rap material, and final grading to match surrounding grade. Site access is available via an approximately 20-foot-wide access point along a field road leading to the drainage location. Images include aerial views of the parking lot, the existing drainage grate, the pipe and spillway exit point, the erosion damage area, reference photos of the desired bowl-shaped rip-rap configuration, and site access photographs with location markers identifying various points on the property. The document serves as a visual reference for contractors to understand the project scope, existing conditions, and design intent.