- Clean firm
- Loads
- Operating
- Size not stated
- 10 · 100 · 1,000 MW
Map
- Clean firm
- Loads
- Operating
- Size not stated
Gilman Mill: location and 1 exact-grade project within 15 mi. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Gilman Mill
Power plant · Hydro
Key facts
Power plant · Hydroran 5% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1941
- Net generation, 2025
- 2,168 MWh
- Grid
- 34 kV to Green Mountain Power Corp (ISNE)
- Location
- Essex County, Vermont
- Operated by
- Ampersand Gilman Hydro LPSourceEIA-860M Preliminary Monthly Electric Generator Inventory
Output
- Biomass and waste
Details
Who’s behind it
No companies named in filings yet.
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- Technology
- Hydro source: “Conventional Hydroelectric”
- Age
- 85 years since 1941
All 4 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Fuel burned (MMBtu), 2025 | 7,398 |
| Capacity factor, 2025 | 0.052 |
| Net generation (MWh), 2025 | 2,168 |
| Balancing authority code | ISNE |
Retirement
EIA-860M September 2026StatusSome generators have retired; the rest of the plant is still in service. As of EIA-860M for September 2026.- Capacity retired
- 4 MW
- Generators retired
- 1
- Capacity still in service
- 4.8 MW
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| GEN5 | Wood/Wood Waste Biomass | 4 MW | Retired | January 2014 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 34 kV
- Transmission or distribution system owner
- Green Mountain Power Corp
- Balancing authority
- ISO New England Inc.
- NERC region
- NPCC
Transmission lines within 15 mi (9)
Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Timeline
- Stated Unit GEN5 scheduled to retire, 4 MW · EIA-860M
- In service · EIA-860M
Sources
4 sourcesSources EIA-860M · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory
Sources
- EIA-860M
- LBNLYin, Nait Belaid & Heleno (2026), Lawrence Berkeley National Laboratory, OEDI, CC BY 4.0: A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024. Modified by Inframation: HIFLD-side fields only, names re-cased, coordinates rounded.
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
Around this plant
Nearby
within 15 mi| Project | Kind | Away | MW |
|---|---|---|---|
| SECURED NETWORK SERVICES, INC. Built | Large load | 9.1 mi |
Sources EPA ICIS-Air