F.c.r. Detention is an earth dam located in Campbell County, Wyoming, built in 1968. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 546 ft long. 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 F.c.r. Detention
The primary purpose of F.c.r. Detention 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 Sioux Ranch, Inc. (private). It impounds the W Fork Spring Creek near Edgemont S D.
The dam stands 20 feet tall and stretches 546 feet across, creates a reservoir covering 11 acres, and has a maximum storage capacity of 120 acre-feet. Completed in 1968, 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 04/22/2025.
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Location
| State | Wyoming |
| County | Campbell |
| Nearest City | Edgemont S D |
| River/Stream | W Fork Spring Creek |
| Coordinates | 43.57580, -105.52740 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 546 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 61 acre-ft |
| Surface Area | 11 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Sioux Ranch, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/22/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00739 |
| Federal ID | WY00739 |
| More Info | State Dam Safety Program |