Gibbons No. 1 is an earth dam located in Campbell County, Wyoming, built in 1962. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 29 ft29 ft tall and 310 ft long, taller than 65% 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 Gibbons No. 1
The primary purpose of Gibbons No. 1 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 Donald R. & Mary Jo Joslyn Rev. Trusts (private). It impounds the Gibbons Draw near Powderville.
The dam stands 29 feet tall and stretches 310 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 96 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1962, 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 04/24/2024.
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Location
| State | Wyoming |
| County | Campbell |
| Nearest City | Powderville |
| River/Stream | Gibbons Draw |
| Coordinates | 44.61000, -105.76500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 310 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 96 acre-ft |
| Max Storage | 96 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Donald R. & Mary Jo Joslyn Rev. Trusts |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/24/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00992 |
| Federal ID | WY00992 |
| More Info | State Dam Safety Program |