Bar M No. 1 is an earth dam located in Albany County, Wyoming, built in 1961. It carries a Low hazard potential classification.
Dam profile
NID height · 34 ft34 ft tall and 816 ft long, taller than 78% 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 Bar M No. 1
The primary purpose of Bar M No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bard Ranch Company (private). It impounds the North Branch Bar M Creek near Torrington.
The dam stands 34 feet tall and stretches 816 feet across, creates a reservoir covering 9 acres, and has a maximum storage capacity of 137 acre-feet. Completed in 1961, 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. The most recent inspection on record was 08/03/2021.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Wyoming |
| County | Albany |
| Nearest City | Torrington |
| River/Stream | North Branch Bar M Creek |
| Coordinates | 42.23240, -105.68960 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 29 ft |
| Dam Length | 816 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 137 acre-ft |
| Max Storage | 137 acre-ft |
| Normal Storage | 81 acre-ft |
| Surface Area | 9 acres |
| Max Discharge | 883 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Bard Ranch Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/03/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00151 |
| Federal ID | WY00151 |
| More Info | State Dam Safety Program |