Pr-11 Retention Dam in Montana, managed by the Bureau of Land Management, serves as a crucial flood risk reduction structure along Beauchamp Creek and the Missouri River.
Completed in 1942, this gravity dam stands at a structural height of 17 feet and has a hydraulic height of 12 feet, with a storage capacity of 529.65 acre-feet. The dam spans 294 feet in length and covers a surface area of 99 acres, providing vital protection to the surrounding Phillips County.
Despite its low hazard potential, Pr-11 Retention Dam undergoes regular inspections every five years to ensure its structural integrity and functionality. The dam's condition is currently rated as "Not Rated," and it meets the guidelines for emergency action plans (EAP) preparation. With its primary purpose being flood risk reduction, this dam plays a crucial role in safeguarding the local community and surrounding areas from potential water-related disasters. Enthusiasts of water resource management and climate resilience will find Pr-11 Retention Dam to be a fascinating example of sustainable infrastructure for mitigating flood risks in the region.
Wind
Humidity
Year Completed |
1942 |
Dam Length |
294 |
River Or Stream |
BEAUCHAMP CK./MISSOURI RIVER(R |
Primary Dam Type |
Gravity |
Surface Area |
99 |
Hydraulic Height |
12 |
Drainage Area |
0.5 |
Nid Storage |
529.65 |
Structural Height |
17 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
17 |
Missouri River Near Landusky Mt
|
9100cfs |
Peoples Creek Near Hays Mt
|
4cfs |
Milk River Near Dodson Mt
|
68cfs |
Milk River At Malta Mt
|
146cfs |
Beaver Cr Bl Guston Coulee Nr Saco Mt
|
67cfs |
Milk River Near Harlem Mt
|
69cfs |