327-C-20-26 Lower Sill Reinforcement.pdf

This document is a request for information from the Department of Transportation Saint Lawrence Seaway Development Corporation seeking sources for small businesses qualified to design and build concrete diffuser structures at Snell Lock. The Corporation plans to replace six deteriorated concrete diffusers below the downstream sill over two winter seasons, with three replaced in the first year and three in the second. Each diffuser comprises approximately 190 cubic yards of reinforced concrete and measures approximately 80 feet long, 14 feet wide, and 13 feet tall with sixteen openings. Interested firms should submit capability statements and relevant project experience by July 14, 2022 to be considered for the two-step solicitation process, beginning with technical proposals and concept designs, followed by a request for proposals. The project scope involves construction in restricted areas approximately 50 feet below lock walls requiring special access means and crane service, along with additional dewatering as water damming will not fully dewater the work areas.