From CSKT Natural Resources
Crow Dam impounds approximately 10,350 acre-feet of water, primarily used for irrigation. The dam was completed in 1933 and included a conveyance channel (spillway) beneath Crow Dam Road and pipe (outlet works) to release water from the Lower Crow Reservoir to Crow Creek. The spillway and outlet works have worn out and will be replaced in multiple phases. The construction dollars are provided through BIA.
This project has been divided up into four phases of work. The first two phases of the project are replacing the spillway. The first phase of replacing the lower portion of the spillway began in May of 2018 and completed in July of 2019. The second phase of work on the upper portion of the spillway will include a concrete inlet structure (weir), which is used to control the reservoir level, is set to begin in 2020. The third phase of the project will include tunneling for a new pipe (outlet works) through the dam that will allow water to be released from the reservoir to the lower Crow Creek for irrigation releases as well as in stream flow releases. The final phase of work will be placing compacted earth fill on the downstream toe of the dam protect the dam during seismic events.
The estimated construction window for Phase 2 is 15-18 months, weather depending, with a tentative start date of March 2020, and a tentative ending date of August 2021. During construction, Crow Dam road will be temporarily closed in the vicinity of Crow Dam.
In addition, annual inspections are conducted on all reservoirs found within the boundaries of the Flathead Indian Reservation. These inspections give maintenance recommendations if needed, these recommendations are prioritized, and funding is secured for the project.
For more information, contact Dan Lozar, Division of Engineering and Water Resources Manager or Gregory Wilson, SOD Program Manager Safety of Dams for the Confederated Salish & Kootenai Tribes, at (406) 675-2700.