Big Casino Creek Dam, located in Lewistown, Montana, was completed in 1976 and is owned by the local government.
Wind
Humidity
Designed by the USDA NRCS, this earth dam stands at a height of 68 feet and has a structural height of 80 feet, providing irrigation for the surrounding area along Big Casino Creek. With a maximum storage capacity of 2063 acre-feet and a normal storage capacity of 124 acre-feet, the dam serves multiple purposes including flood risk reduction, irrigation, and recreation.
The dam has a spillway width of 350 feet and is classified as having a high hazard potential, although its condition assessment is satisfactory. The last inspection was conducted in June 2020, with a frequency of every 5 years. The risk assessment for Big Casino Creek Dam is moderate, with a DSAC assigned date yet to be determined. This crucial infrastructure plays a vital role in water resource management in the region, ensuring a sustainable water supply for agricultural and recreational activities.
Despite being uncontrolled, the outlet gates and spillway of Big Casino Creek Dam effectively manage the flow of water, with a maximum discharge capacity of 16,000 cubic feet per second. The dam is regulated by the DNRC and falls under the jurisdiction of the state of Montana. With its strategic location and vital functions, Big Casino Creek Dam is a key component in the management of water resources and climate resilience in Fergus County, Montana.
Year Completed |
1976 |
Dam Length |
1056 |
Dam Height |
68 |
River Or Stream |
BIG CASINO CREEK |
Primary Dam Type |
Earth |
Surface Area |
72 |
Hydraulic Height |
68 |
Drainage Area |
19.82 |
Nid Storage |
2063 |
Structural Height |
80 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
80 |