# Montville Station

ISO-NE asset profile · https://askthegrid.com/assets/facilities/montville-station

Alpha Generation LLC - New London County - ISONE

Montville Station is a 489.9 MW thermal peaking facility in Uncasville, Connecticut, along the Thames River. The station consists of four units: Unit 5, a 75 MW natural-gas/residual-fuel-oil steam turbine operating since January 1954; Unit 6, a 414.9 MW residual-fuel-oil steam turbine operating since January 1971; and Units 10 and 11, two 2.7 MW distillate-fuel-oil internal-combustion engines placed in service in January 1967 and currently standby. The facility is located on a 49-acre site and has operated continuously since 1954, celebrating its centennial in 2019.

## Metrics

- **Nameplate capacity:** 489.9 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 546 — plant-546

## Facts

- **Technology:** Petroleum Liquids, Natural Gas Steam Turbine
- **Operator:** Montville Power LLC

## Related parties

- **Owner:** Alpha Generation LLC — owner ([source](https://www.alphagen.com/))
- **Parent company:** ArcLight Capital Partners LLC — investment manager and fund sponsor ([source](https://www.arclight.com/))
- **Former owner:** NRG Energy, Inc. — former owner ([source](https://www.nrg.com/))
- **Former owner:** The Connecticut Light and Power Company — predecessor owner and transmission owner
- **Transmission owner:** Connecticut Light & Power Co — transmission and distribution owner

## Sources

- [ctmirror.org](https://ctmirror.org/2013/08/05/legislators-lobby-malloy-administration-montville-renewable-energy-project/) — ctmirror.org · public_source — Source retained for exact-record publication review.
- [downloads.regulations.gov](https://downloads.regulations.gov/EPA-R09-OAR-2012-0634-0017/attachment_31.pdf) — downloads.regulations.gov · authoritative — Source retained for exact-record publication review.
- [investors.nrg.com](https://investors.nrg.com/news-releases/news-release-details/nrg-announces-comprehensive-repowering-initiative) — investors.nrg.com · public_source — Source retained for exact-record publication review.
- [investors.nrg.com](https://investors.nrg.com/news-releases/news-release-details/nrg-energy-completes-acquisition-connecticut-generating-assets) — investors.nrg.com · public_source — Source retained for exact-record publication review.
- [portal.ct.gov](https://portal.ct.gov/-/media/DEEP/air/permits/TitleV/Montville_Power/P1070043-TV.pdf) — portal.ct.gov · authoritative — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/montville-station
Website: [Alpha Generation LLC](https://www.alphagen.com/)

Source: Ask the Grid — https://askthegrid.com/