Bischoff is an earth dam located in Big Horn County, Wyoming, built in 1977. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 56 ft56 ft tall and 680 ft long, taller than 94% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Bischoff
The primary purpose of Bischoff is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Cottonwood Canyon Ranch, LLC (private). It impounds the Willow Creek Offstream.
The dam stands 56 feet tall and stretches 680 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 126 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1977, the structure is 49 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/23/2022.
At 56 feet, this dam is taller than 94% of dams nationwide.
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Location
| State | Wyoming |
| County | Big Horn |
| Nearest City | None |
| River/Stream | Willow Creek Offstream |
| Coordinates | 44.81920, -108.07930 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 56 ft |
| Dam Height | 56 ft |
| Dam Length | 680 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 126 acre-ft |
| Max Storage | 126 acre-ft |
| Normal Storage | 101 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Cottonwood Canyon Ranch, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/23/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01559 |
| Federal ID | WY01559 |
| More Info | State Dam Safety Program |