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- Clean firm
- Wind & solar
- Storage
- In development
- Under construction
- Operating
- 10 · 100 · 1,000 MW
Map
- Clean firm
- Wind & solar
- Storage
- In development
- Under construction
- Operating
Cobble Mountain: location and 5 exact-grade projects within 15 mi. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Cobble Mountain
Power plant · Hydro
Key facts
Power plant · Hydroran 2% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1930
- Net generation, 2025
- 7,061 MWh
- Grid
- 69 kV to Western Massachusetts Electric Company (ISNE)
- Location
- Hampden County, Massachusetts
- Operated by
- City of Holyoke Gas and Elec Dept - (MA)
Output
Details
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- Technology
- Hydro source: “Conventional Hydroelectric”
- Age
- 96 years since 1930
All 6 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Gem |
|
| Grid |
|
| Fuel burned (MMBtu), 2025 | 24,092 |
| Capacity factor, 2025 | 0.024 |
| Net generation (MWh), 2025 | 7,061 |
| Balancing authority code | ISNE |
Ownership
2 companies2| Company | Role | Share | As of | Source |
|---|---|---|---|---|
| City of Holyoke Gas and Elec Dept - (MA) | Operator | EIA-860M | ||
| Springfield Water & Sewer Comm | Owner | 100.0% | Dec 31, 2025 | EIA-860 |
Timeline
- In service · EIA-860M
Sources
5 sourcesSources EIA-860M · GEM · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules
Sources
- EIA-860M
- GEMGlobal Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules
Around this plant
Nearby
within 15 mi| Project | Kind | Away | MW |
|---|---|---|---|
| Holyoke MA BESS 1 Under construction | Storage | 11.6 mi | 5 |
| Chicopee BESS Under construction | Storage | 13.5 mi | 5 |
| Broadleaf Solar Filed | Solar | 14.0 mi | 200 |
| Hadley Falls Postponed | Hydro | 14.9 mi | 3.5 |
| Riverside Holyoke Postponed | Hydro | 15.0 mi | 1.1 |
Sources EIA-860M