Upper Sunshine
High HazardFair ConditionEmergency Action Plan: Yes
Location
| State | Wyoming |
| County | Park |
| Nearest City | MEETEETSE |
| River/Stream | GREYBULL RIVER (OFFSTREAM) |
| Coordinates | 44.06070, -109.04970 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 160 ft |
| Dam Height | 154 ft |
| Dam Length | 1,150 ft |
| Year Completed | 1942 (84 years old) |
Storage & Hydraulics
| NID Storage | 65,100 acre-ft |
| Max Storage | 65,100 acre-ft |
| Normal Storage | 52,987 acre-ft |
| Surface Area | 1,156 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 1,520 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | GREYBULL VALLEY IRRIGATION DISTRICT |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/30/2025 |
| Emergency Action Plan | Yes |