Lower Sunshine
SUNSHINE CREEK OFFSTREAM·
Park, Wyoming·
Built 1972·
Earth·
162 ft tall
Physical Details
| Dam Height | 162 ft (taller than 99.4% in WY) |
| Dam Length | 1,660 ft |
| Dam Type | Earth |
| Max Storage | 71.8K acre-ft |
| Normal Storage | 58.7K acre-ft |
| Surface Area | 1,049 acres |
| Drainage Area | 27 sq mi |
| Max Discharge | 2,800 cfs |
| Year Completed | 1972 (54 years old) |
| NID ID | WY01096 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: May 13, 2021
State Regulated: Yes
Regulatory Agency: SEO
Ownership
GREYBULL VALLEY IRRIGATION DISTRICT
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lower Sunshine?
Lower Sunshine is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Lower Sunshine?
Lower Sunshine is owned by GREYBULL VALLEY IRRIGATION DISTRICT (Private).
When was Lower Sunshine last inspected?
Lower Sunshine was last inspected on May 13, 2021.
When was Lower Sunshine built?
Lower Sunshine was completed in 1972, making it 54 years old.
Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.