Seminoe Pumped Storage Project
Sector: Water Supply and Storage • Location: Casper, Wyoming, United States
Source: Oil City News
A proposed $3 billion pumped storage hydroelectric facility at Seminoe Reservoir that would generate 970 megawatts of power. The project involves pumping water from Seminoe Reservoir to a new 120-acre upper reservoir during surplus energy periods and releasing it back through turbines during peak demand, providing up to 12 hours of full-output energy storage. It requires construction of an access
- Status
- Prospective
- Sector
- Water Supply and Storage, Tunnel, Government, Hydro, Oil and Gas, Power Generation (CCGT), Energy Storage, Bridge
- Location
- Casper, Wyoming, United States of America
- Updated
- 22 Jul 2026
- Source
- Oil City News
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Project Information
Participants
| Not available for this record. |
Status
Original status | planned |
Taiyo status | Prospective |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | A proposed $3 billion pumped storage hydroelectric facility at Seminoe Reservoir that would generate 970 megawatts of power. The project involves pumping water from Seminoe Reservoir to a new 120-acre upper reservoir during surplus energy periods and releasing it back through turbines during peak demand, providing up to 12 hours of full-output energy storage. It requires construction of an access bridge, underground powerhouse, main access tunnel, and a 29-mile transmission line to the Aeolus substation. |
Original sector | Energy |
Budget |
Location
Country | United States of America (USA) |
State | Wyoming |
City | Casper |
Source
Source | Oil City News |
URL |
More Details
Record type | Project |
Sector | Water Supply and Storage, Tunnel, Government, Hydro, Oil and Gas, Power Generation (CCGT), Energy Storage, Bridge |
Article published date | 2026-04-10 |
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