G. W. is an earth dam located in Laramie County, Wyoming, built in 1969. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 790 ft long, taller than 68% 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 G. W.
The primary purpose of G. W. is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Gross & Wilkinson Ranch and State Land (private). It impounds the Spring Creek near Pine Bluffs.
The dam stands 30 feet tall and stretches 790 feet across, creates a reservoir covering 26 acres, has a maximum storage capacity of 369 acre-feet, and collects water from a drainage area of 20 square miles. Completed in 1969, 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 05/21/2020.
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Location
| State | Wyoming |
| County | Laramie |
| Nearest City | Pine Bluffs |
| River/Stream | Spring Creek |
| Coordinates | 41.22954, -104.27113 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 790 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 369 acre-ft |
| Max Storage | 369 acre-ft |
| Normal Storage | 220 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 20 sq mi |
| Max Discharge | 937 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Gross & Wilkinson Ranch and State Land |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/21/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00042 |
| Federal ID | WY00042 |
| More Info | State Dam Safety Program |