Hirsig No. 3 is an earth dam located in Laramie County, Wyoming, built in 1975. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 38 ft38 ft tall and 820 ft long, taller than 84% 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 Hirsig No. 3
The primary purpose of Hirsig No. 3 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by True Ranches LLC & Wyo Board Land Comm (private). It impounds the Branch of North Bear Creek near Hawk Springs.
The dam stands 38 feet tall and stretches 820 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 253 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1975, 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/30/2024.
At 38 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Wyoming |
| County | Laramie |
| Nearest City | Hawk Springs |
| River/Stream | Branch of North Bear Creek |
| Coordinates | 41.57400, -105.05600 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 30 ft |
| Dam Length | 820 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 253 acre-ft |
| Max Storage | 253 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 979 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | True Ranches LLC & Wyo Board Land Comm |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/30/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01368 |
| Federal ID | WY01368 |
| More Info | State Dam Safety Program |