Seymour No. 4 Dam Improvements

The Seymour No. 4 Dam Improvements project, solicited by the Connecticut DAS Procurement agency under solicitation number DEEP090126CM, involves extensive structural upgrades to the dam and its surrounding areas. The primary scope of work includes replacing the existing spillway with a concrete drop inlet structure featuring a 48-inch discharge pipe and a downstream energy dissipator, along with a new 16-inch outlet pipe controlled by a stainless steel slide gate. Additional mechanical improvements include the installation of a new valve and extension stem on the existing low level outlet. Site improvements consist of clearing trees from the embankments, filling the downstream slope near the new spillway, repairing eroded areas on the crest, and raising the crest by one foot. The project also requires the placement of riprap on the upstream slope and the construction of a 100-foot auxiliary spillway with a concrete core wall. Landscaping efforts include clearing trees and stumps from the left dike followed by topsoil application and seeding. Bidders must adhere to the CT DEEP Standard Bid Terms and Conditions, with responses due by October 6, 2026.