Eberhard No. 1 is an earth dam located in Big Horn County, Wyoming. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 37 ft37 ft tall and 493 ft long, taller than 83% 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 Eberhard No. 1
The primary purpose of Eberhard 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 Gifford Ranch LLC (private). It impounds the Long Draw near Bighorn.
The dam stands 37 feet tall and stretches 493 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 211 acre-feet, and collects water from a drainage area of 280 square miles.
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 08/21/2025.
At 37 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | Wyoming |
| County | Big Horn |
| Nearest City | Bighorn |
| River/Stream | Long Draw |
| Coordinates | 44.71520, -108.03980 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 37 ft |
| Dam Height | 37 ft |
| Dam Length | 493 ft |
Storage & Hydraulics
| NID Storage | 211 acre-ft |
| Max Storage | 211 acre-ft |
| Normal Storage | 152 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 280 sq mi |
| Max Discharge | 1,172 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Gifford Ranch LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/21/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01126 |
| Federal ID | WY01126 |
| More Info | State Dam Safety Program |