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Notice: Jocko Valley pipeline construction: expect construction vehicles and occasional traffic interruptions east of Highway 93. Roads affected

Engineering & Water ResourcesConfederated Salish and Kootenai Tribes, home page

Planning and design

Lower Crow Dam Safety Upgrade

Outlet works and embankment stability upgrades for a dam built in 1922, following the completed spillway work.

Timeline
In preliminary design
Location
Lower Crow Reservoir

Project overview

Lower Crow Dam Safety Upgrades consist of upgrades to the spillway, outlet works, and embankment stability during a probable maximum flood, all to address issues of the aging infrastructure (built in 1922). The spillway upgrades were complete over two phase between 2019 and 2022. The outlet works upgrades are in preliminary design that includes two alternatives: Rehabilitation of existing structure, or entirely new structure. The embankment stability upgrades are in preliminary design, which includes a compacted earthen fill with subsurface perforated drain pipe system located along the downstream base of the dam. Environmental mitigation measures are expected due to construction.