Specifications include, but are not limited to: The following work is envisioned in this project, which is funded by a $4M Pre-Disaster Mitigation grant from the Federal Emergency Management Agency (FEMA) through the State of Connecticut, Division of Emergency Management & Homeland Security (CT DEMHS): 1.) In compliance with the Town’s MS4 permit, the goal would be to disconnect DCIA from the storm system by storing onsite 1.3” of rainfall runoff from onsite impervious areas. The onsite drainage system currently collects water and discharges to a pipe by gravity to the Housatonic River, or alternatively through the stormwater pump station. 2.) There are a minimum of three pipes that drain stormwater into the WPCF storm drainage system. One or more may be eliminated with creative solutions. One or two may need to remain, and if so, shall be rehabilitated structurally and gated with the appropriate controls to limit inflow during periods of flooding. 3.) The stormwater pump station was installed in 1974 when the Hurricane Dike protection project was completed around the WPCF. There are a series of gate chambers that are designed to manage the flow of stormwater (and treated effluent) during different conditions. Today, the pump station functions also as the effluent pump station due to changes in the hydraulic profile of the treatment train in 2009, the difficulty in preventing high tides from entering the effluent gravity line, and rising tide conditions affecting gravity flow. Upgrades are needed to ensure the longevity and capacity of the pump station is sufficient.
