# S C Moore

ISO-NE asset profile · https://askthegrid.com/assets/facilities/s-c-moore

Great River Hydro, LLC - Grafton County - ISONE

Moore Dam (listed in EIA-860 as "S C Moore") is a hydroelectric station on the Connecticut River at Littleton, New Hampshire, and Waterford, Vermont, and is part of the Fifteen Mile Falls Hydroelectric Project under FERC License No. P-2077. It is the largest conventional hydropower plant in New England, built around a 3,490-acre, 11-mile-long reservoir behind a 178-foot dam. The station's five operating generators comprise four original 1957 units of 47.7 MW each plus a new 4.6 MW unit that came online in October 2023 to improve minimum-flow releases, for a combined nameplate of about 195.4 MW. It is owned and operated by Great River Hydro, LLC, which acquired the plant as part of a 13-station Connecticut/Deerfield River portfolio in 2017. The plant settles into ISO New England at the LD.MOORE 13.8 node. Its FERC license, issued April 8, 2002, runs through March 31, 2042, and no unit or whole-plant retirement is scheduled.

## Metrics

- **Nameplate capacity:** 195.4 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 2351 — plant-2351

## Facts

- **Technology:** Conventional Hydroelectric
- **Operator:** Great River Hydro, LLC

## Related parties

- **Owner / operator:** Great River Hydro, LLC — Owner, operator, and FERC licensee ([source](https://www.greatriverhydro.com/facilities-location/moore-hydropower-station))
- **Former owner:** TransCanada Corporation — Prior owner, 2005–2017
- **Former owner:** USGen New England, Inc. — Prior owner; bankruptcy and asset sale
- **Developer:** New England Power Company — Historical developer and project originator
- **Regulator:** Federal Energy Regulatory Commission — Federal hydropower licensing and regulatory authority ([source](https://www.ferc.gov/licensing))
- **Balancing authority / market operator:** ISO New England Inc. — Regional ISO, balancing authority, and wholesale market administrator ([source](https://www.iso-ne.com/participate/participant-asset-listings/directory?id=81309&type=customer))
- **Transmission owner:** New England Power Company (d/b/a National Grid) — Owner of Moore Development transmission substation ([source](https://www.nationalgridus.com/Wholesale-Interconnections/New-England))
- **Affiliate / investor:** ArcLight Capital Partners, LLC — Intermediate investor/affiliate; purchased Great River Hydro in 2017, sold to Hydro-Québec in 2023
- **Parent company / equity investor:** Hydro-Québec — Current investor/parent via acquisition of Great River Hydro

## Sources

- [en.wikipedia.org](https://en.wikipedia.org/wiki/Moore_Dam) — en.wikipedia.org · public_source — Source retained for exact-record publication review.
- [puc.vermont.gov](https://puc.vermont.gov/sites/psbnew/files/orders/2005/7038fnl.pdf) — puc.vermont.gov · authoritative — Source retained for exact-record publication review.
- [energy.nh.gov](https://www.energy.nh.gov/sites/g/files/ehbemt551/files/inline-documents/sonh/great-river-hydro-public-comments.pdf) — energy.nh.gov · authoritative — Source retained for exact-record publication review.
- [federalregister.gov](https://www.federalregister.gov/documents/2020/05/01/2020-09320/great-river-hydro-llc-notice-of-application-accepted-for-filing-and-soliciting-comments-motions-to) — federalregister.gov · authoritative — Source retained for exact-record publication review.
- [greatriverhydro.com](https://www.greatriverhydro.com/facilities-location/moore-hydropower-station) — greatriverhydro.com · public_source — Source retained for exact-record publication review.
- [iso-ne.com](https://www.iso-ne.com/participate/participant-asset-listings/directory?id=81309&type=customer) — iso-ne.com · public_source — Source retained for exact-record publication review.
- [prnewswire.com](https://www.prnewswire.com/news-releases/arclight-completes-sale-of-premier-renewable-energy-infrastructure-platform-301751292.html) — prnewswire.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/s-c-moore
Website: [Great River Hydro, LLC](https://www.greatriverhydro.com/facilities-location/moore-hydropower-station)

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