Willwood Diversion Dam is a concrete dam located in Park County, Wyoming, built in 1924. It carries a Low hazard potential classification.
Dam profile
NID height · 70 ft70 ft tall and 476 ft long, taller than 96% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Willwood Diversion Dam
The primary purpose of Willwood Diversion Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bureau of Reclamation (federal). It impounds the Shoshone River.
The dam stands 70 feet tall and stretches 476 feet across, has a maximum storage capacity of 2,100 acre-feet, and collects water from a drainage area of 1,950 square miles. Completed in 1924, 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.
At 70 feet, this dam is taller than 96% of all dams in the United States.
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Location
| State | Wyoming |
| County | Park |
| Nearest City | None |
| River/Stream | Shoshone River |
| Coordinates | 44.67160, -108.90970 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 70 ft |
| Dam Height | 10 ft |
| Dam Length | 476 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 2,100 acre-ft |
| Max Storage | 2,100 acre-ft |
| Normal Storage | 1,000 acre-ft |
| Drainage Area | 1,950 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Bureau of Reclamation |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01382 |
| Federal ID | WY01382 |
| More Info | State Dam Safety Program |