Hudson
Hudson is an earth dam located in Fremont County, Wyoming, built in 1913. It carries a Low hazard potential classification and has a poor condition assessment.
About Hudson
The primary purpose of Hudson is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Graham Ranch Inc (private). It impounds the Long's Creek near Hwy 220.
The dam stands 33 feet tall and stretches 295 feet across, creates a reservoir covering 6 acres, and has a maximum storage capacity of 132 acre-feet. Completed in 1913, the structure is over a century 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/25/2025.
At 33 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Wyoming |
| County | Fremont |
| Nearest City | Hwy 220 |
| River/Stream | Long's Creek |
| Coordinates | 42.66270, -107.96770 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 295 ft |
| Year Completed | 1913 (113 years old) |
Storage & Hydraulics
| NID Storage | 132 acre-ft |
| Max Storage | 132 acre-ft |
| Normal Storage | 48 acre-ft |
| Surface Area | 6 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | GRAHAM RANCH INC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/25/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02061 |
| Federal ID | WY02061 |
| More Info | State Dam Safety Program |