Lower Middlebury
Hydro power plant in Addison County, Vermont. 2.4 MW of nameplate capacity across 3 generators, operated by Green Mountain Power Corp.
Also known as EIA plant 3716
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 2.4 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- August 1917First generator online
- Operator
- Green Mountain Power CorpEIA operator ID 7601
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- None linkedNo verified ISO node
- Location
- Addison County, VT44.0249, −73.1768
- EIA plant ID
- 3716EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Lower Middlebury produces
Free · EIA-923Net generation, 2025
5.20 GWh
5,197 MWh, final
Capacity factor, 2025
24.7%
2024: 20.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.0–6.8
GWh a year. Low 2019, high 2018
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | 5,699 | Not reported | 12 of 12 |
| 2002 | 6,630 | Not reported | 12 of 12 |
| 2003 | 8,465 | Not reported | 12 of 12 |
| 2004 | 7,749 | Not reported | 12 of 12 |
| 2005 | 9,249 | Not reported | 12 of 12 |
| 2006 | 10,913 | Not reported | 12 of 12 |
| 2007 | 8,258 | Not reported | 12 of 12 |
| 2008 | 9,126 | Not reported | 12 of 12 |
| 2009 | 10,880 | Not reported | 12 of 12 |
| 2010 | 9,100 | 43.3% | 12 of 12 |
| 2011 | 11,225 | 53.4% | 12 of 12 |
| 2012 | 8,118 | 38.5% | 12 of 12 |
| 2013 | 7,958 | 37.9% | 12 of 12 |
| 2014 | 6,711 | 31.9% | 12 of 12 |
| 2015 | 3,298 | 15.7% | 12 of 12 |
| 2016 | 5,443 | 25.8% | 12 of 12 |
| 2017 | 5,357 | 25.5% | 12 of 12 |
| 2018 | 6,798 | 32.3% | 12 of 12 |
| 2019 | 0 | 0.0% | 12 of 12 |
| 2020 | 2,059 | 9.8% | 12 of 12 |
| 2021 | 6,318 | 30.1% | 12 of 12 |
| 2022 | 5,897 | 28.0% | 12 of 12 |
| 2023 | 3,454 | 16.4% | 12 of 12 |
| 2024 | 4,261 | 20.2% | 12 of 12 |
| 2025 | 5,197 | 24.7% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 0.8 | August 1917 |
| 2 | Conventional Hydroelectric | 0.8 | August 1917 |
| 3 | Conventional Hydroelectric | 0.8 | August 1917 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Green Mountain Power Corp as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Lower Middlebury
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Questions about Lower Middlebury
How much power does Lower Middlebury produce?
Lower Middlebury reported 5,197 MWh (5.20 GWh) of net generation in 2025, a 24.7% capacity factor on 2.4 MW of nameplate capacity.
Where is Lower Middlebury?
Lower Middlebury is in Addison County, Vermont, at 44.0249, −73.1768. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Lower Middlebury?
EIA-860M for August 2026 lists Green Mountain Power Corp as the operator (EIA operator ID 7601). The operator is not always the owner.
When did Lower Middlebury start operating?
Its first generator began operating in August 1917, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page