Stoney Gate Valve Replacement

Project Summary

Gate Valve Replacement

This project scope encompasses demolition, removal, and replacement of the existing Stoney gate valves, valve guides, valve bases, and machinery. This work will be spread out over four separate dewatering events. The Stoney gate valve system consists of six gate valves that control the filling and emptying of the Lake Washington Ship Canal Large Lock chambers. The valves are located in 14 feet tall by 8-1/2 feet wide culverts. The culverts and associated valves are accessible only when the large lock chambers are dewatered by the Government.

Main Control Panel Replacement

This portion of the project scope encompasses demolition, removal, and replacement of the existing Chittenden Locks main control panel, extension of fiber optic cabling, and incidentals related to the work. The new system will utilize a master programmable logic controller (PLC) and six Remote I/O Panels (RIOPS) each located in the respective miter gate machinery recess. RIOPS will provide localized control of the associated gate valve, and will additionally provide localized control of miter gate operations. 

Details

Location

Seattle, WA

Owner

United States Army Corps of Engineers

Contract Amount

$10.5M

Duration

2018 - present

Anticipated Completion

2021