Barley Reservoir
Barley Reservoir is an earth dam located in Rosebud County, Montana, built in 1958. It carries a Significant hazard potential classification.
About Barley Reservoir
The primary purpose of Barley Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Alva Corp. (private). It impounds the Sand Butte Coulee near Thurlow.
The dam stands 24 feet tall and stretches 2,070 feet across, has a maximum storage capacity of 378 acre-feet, and collects water from a drainage area of 17 square miles. Completed in 1958, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Montana |
| County | Rosebud |
| Nearest City | Thurlow |
| River/Stream | Sand Butte Coulee |
| Coordinates | 46.38760, -106.36990 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 2,070 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 378 acre-ft |
| Max Storage | 378 acre-ft |
| Normal Storage | 187 acre-ft |
| Drainage Area | 17 sq mi |
Ownership & Safety
| Purpose | Irrigation |
| Owner | ALVA CORP. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01764 |
| Federal ID | MT01764 |
| More Info | State Dam Safety Program |