Dry Coulee Dam is an earth dam located in Big Horn County, Montana, built in 1974. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 500 ft long, taller than 68% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Dry Coulee Dam
Dry Coulee Dam is a dam in Big Horn, Montana. The dam is owned by Westmoreland Resources, Inc. (private). It impounds the Middle Fork Sarpy Creek.
The dam stands 30 feet tall and stretches 500 feet across, creates a reservoir covering 10 acres, and has a maximum storage capacity of 158 acre-feet. Completed in 1974, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Montana |
| County | Big Horn |
| Nearest City | None |
| River/Stream | Middle Fork Sarpy Creek |
| Coordinates | 45.81153, -107.08653 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 500 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 158 acre-ft |
| Max Storage | 158 acre-ft |
| Normal Storage | 103 acre-ft |
| Surface Area | 10 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Westmoreland Resources, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03794 |
| Federal ID | MT03794 |
| More Info | State Dam Safety Program |