Work includes demolishing the upper portion of the tower and shortening it to El. 460 feet; removing the existing manual valve operators for gates; furnishing and installing new operators, slide gates, stems and stem guides and replacing trash racks and fish screens outlets; constructing a new metal control house with crane on top of the remaining tower; retrofitting the west conduit by replacing the entire existing 24-inch ID steel pipe within an existing 60-inch conduit, providing supports as required, and extending the pipe an additional approximately 70 feet to the dewatered tower; retrofitting the east conduit by furnishing and installing and encasing a new 36- inch ID steel pipe and supports within the existing 60-inch conduit; and performing related required work.
