PowerPlantFactsEvidence report · prepared 2 September 2026https://powerplantfacts.com/entity/1630
EIA plant 1630
Granville · Hampden · MA
Cobble Mountain
Operated by City of Holyoke Gas and Electric Dept.
Published location
Where is Cobble Mountain?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
42.117112, -72.864663
Open the interactive map ↗Map data © OpenStreetMap contributors
Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 710 MWh |
| 2 | 676 MWh |
| 3 | 727 MWh |
| 4 | 603 MWh |
| 5 | 734 MWh |
| 6 | 1,158 MWh |
| 7 | 1,279 MWh |
| 8 | 377 MWh |
| 9 | 808 MWh |
| 10 | -7 MWh |
| 11 | 183 MWh |
| 12 | 570 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| 1 | Conventional Hydroelectric | WAT | 13 | OP |
| 3 | Conventional Hydroelectric | WAT | 13 | OP |
| 2 | Conventional Hydroelectric | WAT | 7 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
1630
Sector
Electric Utility
Water source
Cobble Mountain Reservoir
Data edition
2024-final