Lake Washington Ship Canal Pump Station
Project Description: Demolition of existing pump plant equipment residing within a 26 feet diameter by 65 feet deep dry basement well that was located underneath the Administration Building. All work required accommodating severe overhead height restrictions, limited side access and no direct vehicular access. Demolition included lead abatement work, removal of pipe up to 60 in diameter, removal of multiple valves up to 30 in size, and two 30 volute pumps. Work involved building a temporary jib crane and monorail hoist inside the pump shaft in order to perform the work. Installed new pipe up to 60 in diameter and a new 42 submersible pump set deep within the shaft. Furnished and installed all process pump controls components complete with remote operation. Work also included a new oil water separator system, a small lock pump, and associated piping. Valves required remote actuation via extension rods up to 45' in length with electric motors. Furnished and installed new 480v unit substation and motor control center. Rebuilt multiple levels of platforms. Replaced 14 piping under the large locks to the small locks within a confined tunnel with HDPE pipe. Partially disassembled historic motor casings and valve actuation machinery returned historical equipment components to their original locations upon completion of the contract.
“Prospect, as a company, has very high internal standards for excellence.”
-United States Army Corps of Engineers
Location: Seattle, WA
Owner: US Army Corps of Engineers
Engineer: US Army Corps of Engineers
Value: $5.8 million
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