Seminoe Pumped Water Storage Project
Sector: Hydro • Location: Casper, Wyoming, United States
Source: New Haven Register
A proposed $4 billion pumped-water electricity storage facility at Seminoe Reservoir in Wyoming. The project involves building a 13,400-acre-foot reservoir in the Bennett Mountains above the current Seminoe Reservoir. Water will be pumped uphill during off-peak hours when renewable energy is abundant and released during peak demand to generate hydroelectricity, acting as a large-scale energy stora
- Status
- Prospective
- Sector
- Hydro, Energy Storage, Water Supply and Storage, Power Generation (CCGT), Commercial
- Location
- Casper, Wyoming, United States of America
- Updated
- 22 Jul 2026
- Source
- New Haven Register
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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 $4 billion pumped-water electricity storage facility at Seminoe Reservoir in Wyoming. The project involves building a 13,400-acre-foot reservoir in the Bennett Mountains above the current Seminoe Reservoir. Water will be pumped uphill during off-peak hours when renewable energy is abundant and released during peak demand to generate hydroelectricity, acting as a large-scale energy storage system. The project aims to meet Wyoming's future energy needs and lower electricity costs, but faces criticism over environmental impacts and permitting processes. |
Original sector | Energy |
Budget |
Location
Country | United States of America (USA) |
State | Wyoming |
City | Casper |
Source
Source | New Haven Register |
URL |
More Details
Record type | Project |
Sector | Hydro, Energy Storage, Water Supply and Storage, Power Generation (CCGT), Commercial |
Article published date | 2026-06-01 |
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