# Bath County

PJM Hydroelectric Pumped Storage · https://askthegrid.com/assets/facilities/bath-county

Bath County is a battery energy storage facility with 2,862 MW of EIA-reported nameplate capacity and 24,000 MWh of reported energy capacity in Bath County, Virginia, registered as EIA Plant ID 6167. Virginia Electric & Power Co is the registered plant entity or operator. Dominion Energy identifies Bath County as the largest pumped-hydro energy-storage facility in North America. Commercial operation began in December 1985. Its grid role is pumped-storage balancing and energy-shifting resource serving PJM; the operator describes the station as balancing electricity needs across multiple states.

## Key facts

- Technology: Hydroelectric Pumped Storage
- Power capacity: 2862 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: PJM
- Balancing authority: PJM
- Substation: Two interconnecting substations: one in Augusta County near Bridgewater, Virginia, and one in Rockbridge County near Lexington, Virginia.
- Point of interconnection: Two interconnecting substations: one in Augusta County near Bridgewater, Virginia, and one in Rockbridge County near Lexington, Virginia.
- Interconnection voltage: 500 kV

## Source-backed facts

- Owner logo domain: dominionenergy.com — Bath County Pumped Storage Station · confidence: high
- Official project url: http://www.dominionenergy.com/en/About/Making-Energy/Hydroelectric-Power-Facilities/Bath-County-Pumped-Storage-Station — Bath County Pumped Storage Station · confidence: high
- Description: Bath County is a pumped-storage hydroelectric station in Bath County, Virginia, recorded as EIA plant 6167 with 2,862 MW of nameplate capacity, six operational generating units, and PJM as its balancing authority. Dominion Energy’s project page identifies the station as a six-unit facility with 3,003 megawatts of net generating capacity; commercial operation began in December 1985. The associated FERC project is the Bath County Pumped Storage Project, No. 2716. — Bath County Pumped Storage Station · confidence: medium
- Parties.0: {"relationship":"Joint owner; 60% ownership","name":"Dominion Energy","official_url":"http://www.dominionenergy.com/en/About/Making-Energy/Hydroelectric-Power-Facilities/Bath-County-Pumped-Storage-Station"} — Bath County Pumped Storage Station · confidence: high
- Parties.1: {"relationship":"Joint owner; approximately 24% ownership","name":"Bath County Energy, LLC","official_url":null} — Bath County Pumped Storage Station · confidence: medium
- Parties.2: {"relationship":"Joint owner; approximately 16% ownership","name":"Alleghany Power System","official_url":null} — Bath County Pumped Storage Station · confidence: medium
- Parties.5: {"relationship":"Geotechnical, geologic, and dam-safety services provider since 2015","name":"Schnabel Engineering","official_url":"https://www.schnabel-eng.com/projects/bath-county-pumped-storage-station/"} — Bath County Pumped Storage Station | Schnabel Engineering · confidence: high
- Parties.6: {"relationship":"Turbine modernization contractor; modernized the station’s six turbines","name":"Voith","official_url":"https://www.voith.com/corp-en/industry-solutions/hydropower/pumped-storage-plants/bath-county-usa.html"} — Bath County, USA | Voith · confidence: high
- Unit configuration: Six Francis reversible pump-turbines in a pumped-storage hydroelectric configuration; Dominion identifies six generating units with 3,003 MW net generating capacity. — Federal Register :: Virginia Electric and Power Company d/b/a Dominion Energy Virginia, Allegheny Generating Company, and Bath County Energy, LLC; Notice of Application Tendered for Filing With the Commission and Establishing Procedural Schedule for Licensing and Deadline for Submission of Final Amendments · confidence: medium
- Unit configuration: Six Francis reversible pump-turbines in a pumped-storage hydroelectric configuration; Dominion identifies six generating units with 3,003 MW net generating capacity. — Bath County Pumped Storage Station | Dominion Energy · confidence: medium
- Commercial operation date: 1985-12 — Bath County Pumped Storage Station | Dominion Energy · confidence: high
- Unit count: 6 — Bath County Pumped Storage Station | Dominion Energy · confidence: high
- Energy mwh: 24000 — Source · confidence: medium
- Construction scope: Bath County Pumped Storage Station consists of two large reservoirs, a 135-foot-high by 2,400-foot-long lower dam containing approximately 4 million cubic yards of earth and rock fill, and a 460-foot-high by 2,200-foot-long upper dam containing approximately 18 million cubic yards of earth and rock fill. The station has six turbine-generators with 3,003 MW net generating capacity. Voith modernized the six pump-turbines, replacing the impellers and rehabilitating the head covers; each modernized turbine has a maximum generating capacity of 530 MW. — Source · confidence: high
- Construction scope: Bath County Pumped Storage Station consists of two large reservoirs, a 135-foot-high by 2,400-foot-long lower dam containing approximately 4 million cubic yards of earth and rock fill, and a 460-foot-high by 2,200-foot-long upper dam containing approximately 18 million cubic yards of earth and rock fill. The station has six turbine-generators with 3,003 MW net generating capacity. Voith modernized the six pump-turbines, replacing the impellers and rehabilitating the head covers; each modernized turbine has a maximum generating capacity of 530 MW. — Bath County, USA | Voith · confidence: high
- Product url: https://www.voith.com/corp-en/products-services/hydropower-components/turbines.html — Turbines & shut-off valves | Voith · confidence: medium
- Kind: hydro — Source · confidence: high
- Equipment models: [{"manufacturer_domain":"voith.com","product_url":"https://www.voith.com/corp-en/products-services/hydropower-components/turbines.html","count":6,"unit_mw":530,"name":"Voith-modernized Francis pump-turbines"}] — Voith Hydro in the United States | Voith · confidence: medium
- Equipment models.0: {"manufacturer_domain":"voith.com","product_url":"https://www.voith.com/corp-en/products-services/hydropower-components/turbines.html","count":6,"unit_mw":530,"name":"Voith-modernized Francis pump-turbines"} — Voith Hydro in the United States | Voith · confidence: medium
- Significance: Dominion Energy identifies Bath County as the largest pumped-hydro energy-storage facility in North America. The station balances electricity demand across six states and has approximately 24,000 MWh of storage capacity. — Bath County Pumped Storage Station | Dominion Energy · confidence: high
- Quality notes: ["The 2,862 MW EIA figure is a nameplate-capacity record, while Dominion's 3,003 MW figure is reported as net generating capacity; these are different reporting bases for the same six-unit station.","The approximately $925 million figure announced in January 2017 covered a 1,572 MW multi-asset FirstEnergy portfolio, not a Bath County-only purchase price. The May 2018 filing reported approximately $355 million of net proceeds for the sale of approximately 59% of AGC's Bath County interest.","The 2003–2009 Voith work was a turbine and motor-generator redevelopment, overhaul, and uprating program; the EIA record identifies all six generating units as operational with no planned units."] — FirstEnergy to Sell Competitive Natural Gas and Hydro Assets to LS Power Equity Partners · confidence: medium
- Quality notes: ["The 2,862 MW EIA figure is a nameplate-capacity record, while Dominion's 3,003 MW figure is reported as net generating capacity; these are different reporting bases for the same six-unit station.","The approximately $925 million figure announced in January 2017 covered a 1,572 MW multi-asset FirstEnergy portfolio, not a Bath County-only purchase price. The May 2018 filing reported approximately $355 million of net proceeds for the sale of approximately 59% of AGC's Bath County interest.","The 2003–2009 Voith work was a turbine and motor-generator redevelopment, overhaul, and uprating program; the EIA record identifies all six generating units as operational with no planned units."] — Source · confidence: medium
- Quality notes: ["The 2,862 MW EIA figure is a nameplate-capacity record, while Dominion's 3,003 MW figure is reported as net generating capacity; these are different reporting bases for the same six-unit station.","The approximately $925 million figure announced in January 2017 covered a 1,572 MW multi-asset FirstEnergy portfolio, not a Bath County-only purchase price. The May 2018 filing reported approximately $355 million of net proceeds for the sale of approximately 59% of AGC's Bath County interest.","The 2003–2009 Voith work was a turbine and motor-generator redevelopment, overhaul, and uprating program; the EIA record identifies all six generating units as operational with no planned units."] — Bath County, USA | Voith · confidence: medium
- Financing summary: The station's reported construction cost was approximately $1.6 billion, with construction beginning in 1977 and completion in 1985; Separately, on 2017-01-19 FirstEnergy announced an approximately $925 million all-cash portfolio sale to an LS Power affiliate that included Bath County Hydro. The sale closed on 2018-05-03, and FirstEnergy reported approximately $355 million of net proceeds for the sale of approximately 59% of Allegheny Generating Company's Bath County interest. The $925 million amount was portfolio sale consideration, not project financing or a Bath County-only valuation. — How Rye Development is Transforming Mining Lands... · confidence: medium
- Financing summary: The station's reported construction cost was approximately $1.6 billion, with construction beginning in 1977 and completion in 1985; Separately, on 2017-01-19 FirstEnergy announced an approximately $925 million all-cash portfolio sale to an LS Power affiliate that included Bath County Hydro. The sale closed on 2018-05-03, and FirstEnergy reported approximately $355 million of net proceeds for the sale of approximately 59% of Allegheny Generating Company's Bath County interest. The $925 million amount was portfolio sale consideration, not project financing or a Bath County-only valuation. — FirstEnergy to Sell Competitive Natural Gas and Hydro Assets to LS Power Equity Partners · confidence: medium
- Financing summary: The station's reported construction cost was approximately $1.6 billion, with construction beginning in 1977 and completion in 1985; Separately, on 2017-01-19 FirstEnergy announced an approximately $925 million all-cash portfolio sale to an LS Power affiliate that included Bath County Hydro. The sale closed on 2018-05-03, and FirstEnergy reported approximately $355 million of net proceeds for the sale of approximately 59% of Allegheny Generating Company's Bath County interest. The $925 million amount was portfolio sale consideration, not project financing or a Bath County-only valuation. — Source · confidence: medium
- Commercial parties.1: {"relationship":"Joint owner","name":"Bath County Energy, LLC","detail":"Owns approximately 24% of the station.","official_url":null} — Bath County Pumped Storage Station | Dominion Energy · confidence: medium
- Commercial parties.2: {"relationship":"Joint owner","name":"Alleghany Power System","detail":"Owns approximately 16% of the station.","official_url":null} — Bath County Pumped Storage Station | Dominion Energy · confidence: medium
- Commercial parties.4: {"relationship":"Seller","name":"FirstEnergy Corp.","detail":"Through Allegheny Energy Supply Company and Allegheny Generating Company, sold approximately 59% of AGC's Bath County interest to an LS Power affiliate, with the closing completed on 2018-05-03.","official_url":"https://www.firstenergycorp.com/"} — FirstEnergy to Sell Competitive Natural Gas and Hydro Assets to LS Power Equity Partners · confidence: high
- Commercial parties.4: {"relationship":"Seller","name":"FirstEnergy Corp.","detail":"Through Allegheny Energy Supply Company and Allegheny Generating Company, sold approximately 59% of AGC's Bath County interest to an LS Power affiliate, with the closing completed on 2018-05-03.","official_url":"https://www.firstenergycorp.com/"} — Source · confidence: high
- Commercial parties.6: {"relationship":"Turbine modernization contractor","name":"Voith","detail":"Redeveloped and modernized the station's six pump-turbines and motor-generators; the overhaul was completed in March 2009 and increased maximum unit capability.","official_url":"https://www.voith.com/"} — Bath County, USA | Voith · confidence: high
- Commercial parties.7: {"relationship":"Geotechnical and dam-safety services provider","name":"Schnabel Engineering","detail":"Has provided geotechnical, geologic, instrumentation, hydrology, and dam-safety services at Bath County since 2015 for Dominion Energy.","official_url":"https://www.schnabel-eng.com/"} — Source · confidence: high
- Timeline.1: {"event":"FERC license issued","date":"1977-01","detail":"The Bath County project received its license in January 1977."} — Bath County Pumped Storage Station | Dominion Energy · confidence: high
- Timeline.2: {"event":"Construction began","date":"1977-03","detail":"Construction of the Bath County Pumped Storage Station began in March 1977."} — Bath County Pumped Storage Station · confidence: medium
- Timeline.5: {"event":"Commercial operation began","date":"1985-12","detail":"Commercial operation began in December 1985."} — Bath County Pumped Storage Station | Dominion Energy · confidence: high
- Timeline.6: {"event":"Voith redevelopment commissioned","date":"2003","detail":"Voith was commissioned to redevelop the pump-turbines to improve efficiency and support continued economic operation."} — Bath County, USA | Voith · confidence: high
- Timeline.7: {"event":"Voith overhaul completed","date":"2009-03","detail":"Voith completed the overhaul of all six pump-turbines and motor-generators in March 2009, extending equipment service life and increasing unit capability."} — untitled · confidence: high
- Timeline.9: {"event":"Portfolio sale agreement announced","date":"2017-01-19","detail":"FirstEnergy announced an agreement to sell its competitive hydro interest, including Bath County Hydro, to a subsidiary of LS Power Equity Partners III for approximately $925 million in an all-cash, multi-asset transaction."} — FirstEnergy to Sell Competitive Natural Gas and Hydro Assets to LS Power Equity Partners · confidence: high
- Timeline.10: {"event":"LS Power acquisition completed","date":"2018-05-03","detail":"FirstEnergy subsidiaries Allegheny Energy Supply Company and Allegheny Generating Company completed the sale of approximately 59% of AGC's Bath County interest. LS Power reported acquiring a 23.8% interest, equivalent to approximately 716 MW, in May 2018."} — Source · confidence: high
- Quality notes.1: The approximately $925 million figure announced in January 2017 covered a 1,572 MW multi-asset FirstEnergy portfolio, not a Bath County-only purchase price. The May 2018 filing reported approximately $355 million of net proceeds for the sale of approximately 59% of AGC's Bath County interest. — FirstEnergy to Sell Competitive Natural Gas and Hydro Assets to LS Power Equity Partners · confidence: high
- Quality notes.2: The 2003–2009 Voith work was a turbine and motor-generator redevelopment, overhaul, and uprating program. — Bath County, USA | Voith · confidence: medium
- Grid role: Pumped-storage balancing and energy-shifting resource serving PJM; the operator describes the station as balancing electricity needs across multiple states. — Source · confidence: high

## Timeline

- 1977-01 — FERC license issued
  The Bath County project received its license in January 1977.
  Source: Bath County Pumped Storage Station | Dominion Energy (https://www.dominionenergy.com/en/About/Making-Energy/Hydroelectric-Power-Facilities/Bath-County-Pumped-Storage-Station)
- 1977-03 — Construction began
  Construction of the Bath County Pumped Storage Station began in March 1977.
  Source: Bath County Pumped Storage Station (https://en.wikipedia.org/wiki/Bath_County_Pumped_Storage_Station)
- 1980 — Construction suspended
  VEPCO suspended construction after three years because peak-demand growth was below its forecasts.
  Source: Pumped Storage in Bath County (https://www.virginiaplaces.org/energy/bathpumped.html)
- 1985-12 — Commercial operation began
  Commercial operation began in December 1985.
  Source: Bath County Pumped Storage Station | Dominion Energy (https://www.dominionenergy.com/en/About/Making-Energy/Hydroelectric-Power-Facilities/Bath-County-Pumped-Storage-Station)
- 2003 — Voith redevelopment commissioned
  Voith was commissioned to redevelop the pump-turbines to improve efficiency and support continued economic operation.
  Source: Bath County, USA | Voith (https://www.voith.com/corp-en/industry-solutions/hydropower/pumped-storage-plants/bath-county-usa.html)
- 2018-05 — Acquisition closed
  Closing of sale by AE Supply and AGC of approximately 59% of AGC's Bath County interest to Aspen Generating, LLC. Net proceeds approximately $355 million (includes timing-based adjustment, subject to customary post-closing adjustments). LS Power reports acquired interest as 23.8% of 3,008 MW facility (716 MW nameplate capacity).
  Source: Source (https://www.sec.gov/Archives/edgar/data/1031296/000103129618000038/a8-kdated05092018.htm)

## Sources

- [Bath County Pumped Storage Station](https://www.dominionenergy.com/en/About/Making-Energy/Hydroelectric-Power-Facilities/Bath-County-Pumped-Storage-Station) — dominionenergy.com · tier other
- [Bath County Pumped Storage Station | Schnabel Engineering](https://www.schnabel-eng.com/projects/bath-county-pumped-storage-station/) — schnabel-eng.com · tier other
- [Bath County, USA | Voith](https://www.voith.com/corp-en/industry-solutions/hydropower/pumped-storage-plants/bath-county-usa.html) — voith.com · tier other
- [Federal Register :: Virginia Electric and Power Company d/b/a Dominion Energy Virginia, Allegheny Generating Company, and Bath County Energy, LLC; Notice of Application Tendered for Filing With the Commission and Establishing Procedural Schedule for Licensing and Deadline for Submission of Final Amendments](https://www.federalregister.gov/documents/2025/01/15/2025-00836/virginia-electric-and-power-company-dba-dominion-energy-virginia-allegheny-generating-company-and) — federalregister.gov · tier regulatory
- [Bath County Pumped Storage Station](https://en.wikipedia.org/wiki/Bath_County_Pumped_Storage_Station) — en.wikipedia.org · tier other
- [Source](https://schnabel-eng.com/projects/bath-county-pumped-storage-station) — schnabel-eng.com · tier other
- [Source](https://dominionenergy.com/en/About/Making-Energy/Hydroelectric-Power-Facilities/Bath-County-Pumped-Storage-Station) — dominionenergy.com · tier other
- [Turbines & shut-off valves | Voith](https://www.voith.com/corp-en/products-services/hydropower-components/turbines.html) — voith.com · tier other
- [Voith Hydro in the United States | Voith](https://www.voith.com/corp-en/about-us/markets-locations/united-states/voith-hydro.html) — voith.com · tier other
- [Pumped Storage in Bath County](https://www.virginiaplaces.org/energy/bathpumped.html) — virginiaplaces.org · tier other
- [LS Power Completes Acquisition of 1,600 MW Power Northeast Generation Portfolio - LS Power](https://www.lspower.com/news/ls-power-completes-acquisition-of-1600-mw-power-generation-portfolio-in-the-northeast/) — lspower.com · tier other
- [FirstEnergy to Sell Competitive Natural Gas and Hydro Assets to LS Power Equity Partners](https://investors.firstenergycorp.com/investor-materials/news-releases/news-details/2017/FirstEnergy-to-Sell-Competitive-Natural-Gas-and-Hydro-Assets-to-LS-Power-Equity-Partners/default.aspx) — investors.firstenergycorp.com · tier other
- [Source](https://www.sec.gov/Archives/edgar/data/1031296/000103129618000038/a8-kdated05092018.htm) — sec.gov · tier regulatory
- [How Rye Development is Transforming Mining Lands ...](https://hydro.org/powerhouse/article/behind-the-scenes-how-rye-development-is-transforming-mining-lands-with-pumped-storage/) — hydro.org · tier other
- [untitled](https://www.voith.com/corp-en/Hypower_18.pdf) — voith.com · tier other
- [Current Facilities - REV | Renewables & Energy Storage](https://www.revrenewables.com/facilities/) — revrenewables.com · tier other

## Data quality

- The 2,862 MW EIA figure is a nameplate-capacity record, while Dominion's 3,003 MW figure is reported as net generating capacity; these are different reporting bases for the same six-unit station. The approximately $925 million figure announced in January 2017 covered a 1,572 MW multi-asset FirstEnergy portfolio, not a Bath County-only purchase price. The May 2018 filing reported approximately $355 million of net proceeds for the sale of approximately 59% of AGC's Bath County interest. The 2003–2009 Voith work was a turbine and motor-generator redevelopment, overhaul, and uprating program; No retirement is reported; the EIA record identifies all six generating units as operational with no planned units.

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