Shale Creek is an earth dam located in Petroleum County, Montana, built in 1957. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 1,350 ft long, taller than 65% 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 Shale Creek
The primary purpose of Shale Creek is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Hans Marks (private). It impounds the Box Elder Creek near Mosby.
The dam stands 29 feet tall and stretches 1,350 feet across, has a maximum storage capacity of 930 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1957, 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 | Petroleum |
| Nearest City | Mosby |
| River/Stream | Box Elder Creek |
| Coordinates | 47.09530, -108.33900 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 1,350 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 930 acre-ft |
| Max Storage | 930 acre-ft |
| Normal Storage | 420 acre-ft |
| Drainage Area | 6 sq mi |
| Max Discharge | 1,300 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Hans Marks |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00138 |
| Federal ID | MT00138 |
| More Info | State Dam Safety Program |