Green Hills
Green Hills is an earth dam located in Washakie County, Wyoming, built in 1971. It carries a Low hazard potential classification and has a fair condition assessment.
About Green Hills
The primary purpose of Green Hills is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by City Of Worland (local government). It impounds the Runway Draw near Manderson.
The dam stands 17 feet tall and stretches 588 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 115 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1971, 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 03/31/2021.
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Location
| State | Wyoming |
| County | Washakie |
| Nearest City | Manderson |
| River/Stream | Runway Draw |
| Coordinates | 43.96880, -107.94080 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 588 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 115 acre-ft |
| Max Storage | 115 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 337 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | CITY OF WORLAND |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 03/31/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01008 |
| Federal ID | WY01008 |
| More Info | State Dam Safety Program |