Pumped Storage Projects

The following are among the pumped storage projects currently being developed by Gridflex:

Maysville Pumped Storage

Location: Mason County, Kentucky
Type: Closed Loop Pumped Storage using Underground Mine
Generating Capacity: 1,000 MW
Energy Storage Potential: 11,000 MWh

White Pine Pumped Storage

Location: Ely County, Nevada
Type: Closed Loop Pumped Storage
Generating Capacity: 750 MW
Energy Storage Potential:  9,000 MWh

Eldorado Pumped Storage

Location: Clark County, Nevada
Type: Closed Loop Pumped Storage
Generating Capacity: 750-1,000 MW
Energy Storage Potential:  11,000 MWh

Table Mountain Pumped Storage

Location: Mohave County, Arizona
Type: Closed Loop Pumped Storage
Generating Capacity: 600 MW
Energy Storage Potential: 6,900 MWh

Black Canyon Pumped Storage

Location:  Carbon County, Wyoming
Type: Pumped storage utilizing existing lower reservoirs
Generating Capacity: 700-1,000 MW
Energy Storage Potential: 11,000 MWh

Medicine Bow Pumped Storage

Location:  Carbon County, Wyoming
Type: Closed Loop Pumped Storage
Generating Capacity: 400 MW
Energy Storage Potential: 9,750 MWh

Deer Creek Pumped Storage

Location:  Converse County, Wyoming
Type: Closed Loop Pumped Storage
Generating Capacity: 500 MW
Energy Storage Potential: 12,000 MWh

Oregon Winds Pumped Storage

Location:  Sherman County, Oregon
Type: Closed Loop Pumped Storage
Generating Capacity: 500-750 MW
Energy Storage Potential: 12,500 MWh

Owyhee Pumped Storage

Location:  Malheur County, Oregon
Type: Pumped storage utilizing an existing lower reservoir
Generating Capacity: 500 MW
Energy Storage Potential: 12,000 MWh

Black Mountain Pumped Storage

Location: Mineral/Lyon Counties, Nevada
Type: Closed Loop Pumped Storage
Generating Capacity: 1,000 MW
Energy Storage Potential: 13,500 MWh

Mount Storm Pumped Storage

Location:  Grant County, West Virginia
Type: Closed Loop Pumped Storage
Generating Capacity: 500 MW
Energy Storage Potential: 9,250 MWh

Pajuela Peak Pumped Storage

Location:  Kern County, California
Type: Closed Loop Pumped Storage
Generating Capacity: 500 MW
Energy Storage Potential: 8,000 MWh

Prineville Pumped Storage

Location: Crook County, Oregon
Type: Existing Reservoir
Generating Capacity: 150 MW
Energy Storage Potential:1,250 MWh

Cascade Pumped Storage

Location: Snohomish County, Washington
Type: Semi-Closed Loop
Generating Capacity: 600 MW
Energy Storage Potential: 10,500 MWh

Lanai Pumped Storage

Location:  Island of Lana’i, Maui County, Hawaii
Type: Seawater Pumped Storage
Generating Capacity: 300 MW
Energy Storage Potential:  9,250 MWh

Gridflex is investigating additional high-potential pumped storage sites in areas where they can support renewable resource integration.

Compressed Air Energy Storage Projects

Gridflex is actively pursuing four salt-based CAES projects in areas with significant renewable resource development. Each project has the potential for at least 300 MW generating capacity, with modular expansion potential.