Twiford is an earth dam located in Platte County, Wyoming, built in 1944. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 325 ft long, taller than 80% 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 Twiford
The primary purpose of Twiford is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Middle Bear Ranch (private). It impounds the N Bear Creek near Guernsey.
The dam stands 35 feet tall and stretches 325 feet across, creates a reservoir covering 30 acres, and has a maximum storage capacity of 508 acre-feet. Completed in 1944, the structure is well-established, with more than 75 years of service.
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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 08/05/2024.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Wyoming |
| County | Platte |
| Nearest City | Guernsey |
| River/Stream | N Bear Creek |
| Coordinates | 42.41000, -104.96861 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 325 ft |
| Year Completed | 1944 (82 years old) |
Storage & Hydraulics
| NID Storage | 508 acre-ft |
| Max Storage | 508 acre-ft |
| Normal Storage | 285 acre-ft |
| Surface Area | 30 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Middle Bear Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/05/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00062 |
| Federal ID | WY00062 |
| More Info | State Dam Safety Program |