Willow Park, located in Johnson County, Wyoming, is a privately owned earth dam constructed in 1959 for irrigation purposes.
Wind
Humidity
This dam spans 860 feet in length and stands at a height of 60 feet, with a storage capacity of 6,469 acre-feet. Situated on the South Fork of South Piney Creek, Willow Park serves multiple functions including fire protection, stock watering, and recreational activities in addition to its primary role in irrigation.
Managed by the State Engineer's Office in Wyoming, Willow Park has been deemed a high hazard potential dam with a moderate risk assessment score of 3. The dam features a single slide gate outlet and an uncontrolled spillway with a width of 5 feet. Regular inspections are conducted, with the last assessment occurring in August 2017. Despite its age, Willow Park remains a vital resource for water management in the region, supporting agriculture and other water-related activities while also serving as an important structure for climate and water resource enthusiasts to study and monitor.
Year Completed |
1959 |
Dam Length |
860 |
Dam Height |
56 |
River Or Stream |
SOUTH FORK SOUTH PINEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
213 |
Hydraulic Height |
47 |
Drainage Area |
34 |
Nid Storage |
6469 |
Structural Height |
60 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
60 |
South Piney Creek At Willow Park
|
0cfs |
Rock Creek Near Buffalo
|
70cfs |
Piney Creek At Kearny
|
113cfs |
Clear Creek Near Buffalo
|
12cfs |
Shell Creek Above Shell Creek Reservoir
|
13cfs |
Goose Creek Near Acme
|
123cfs |
| Location | Reservations | Toilets |
|---|---|---|
Hunter Corral Campground
|
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Little Goose Campground
|
||
Cross Creek Campground
|
||
Coffeen Park Campground
|
||
Coffeen Park
|
||
Middle Fork
|