Seminoe
NORTH PLATTE RIVER·
Carbon, Wyoming·
Built 1938·
Concrete·
295 ft tall
Physical Details
| Dam Height | 295 ft (taller than 99.9% in WY) |
| Dam Length | 530 ft |
| Dam Type | Concrete |
| Max Storage | 1.0M acre-ft |
| Normal Storage | 1.0M acre-ft |
| Surface Area | 20,291 acres |
| Drainage Area | 7,210 sq mi |
| Max Discharge | 48,500 cfs |
| Year Completed | 1938 (88 years old) |
| NID ID | WY01297 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: June 16, 2020
State Regulated: Yes
Regulatory Agency: SEO
Ownership
RECLAMATION
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Seminoe?
Seminoe is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Seminoe?
Seminoe is owned by RECLAMATION (Federal Government).
When was Seminoe last inspected?
Seminoe was last inspected on June 16, 2020.
When was Seminoe built?
Seminoe was completed in 1938, making it 88 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.