Innes
Innes is an earth dam located in Campbell County, Wyoming, built in 1956. It carries a Low hazard potential classification and has a fair condition assessment.
About Innes
The primary purpose of Innes 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 Innes Ranch, Llc (private). It impounds the N Prong Pumpkin Creek near County Road.
The dam stands 33 feet tall and stretches 776 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 282 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1956, 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 05/02/2025.
At 33 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Wyoming |
| County | Campbell |
| Nearest City | County Road |
| River/Stream | N Prong Pumpkin Creek |
| Coordinates | 43.96370, -105.86940 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 30 ft |
| Dam Length | 776 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 282 acre-ft |
| Max Storage | 282 acre-ft |
| Normal Storage | 129 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 2,498 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | INNES RANCH, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/02/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00563 |
| Federal ID | WY00563 |
| More Info | State Dam Safety Program |