Raw Water Supply – Pipeline River Crossing

Following the design, the City with Associated Engineering utilized a request for proposal approach in order to retain a contractor for completion of the 1500 mm (60″) diameter, coated steel, river crossing pipeline. This pipeline connects the City’s new river intake and pump station structure on the east side of the river, to the City’s existing 1500 mm (60″) diameter raw water supply line on the west side of the river which serves as the primary water supply main to the Avenue H Water Treatment Plant. Isolation valve chambers are located at each side of the crossing at the tie-in locations.

Following a review of multiple proposals involving different construction methods, the City selected Hamm Construction to complete the crossing based on their proposed “isolation by coffer dam” installation method. Regulatory approvals were then obtained, and construction was completed in the summer and fall period of 2010 with Associated Engineering providing engineering services during the construction.