How big is Seneca Generation LLC?

Seneca Generation LLC has a reported capacity of 437.9 MW. Source: EIA Form 860.

What kind of plant is Seneca Generation LLC?

Seneca Generation LLC is a Hydroelectric Pumped Storage, Conventional Hydroelectric facility in Warren County, PA, participating in the PJM market.

Where is Seneca Generation LLC located?

Seneca Generation LLC is in Warren County, PA, inside the PJM balancing area.

Who operates Seneca Generation LLC?

Seneca Generation LLC is operated by Seneca Generation LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Seneca Generation LLC generate?

Seneca Generation LLC reported -344.9 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

Where does Seneca Generation LLC connect to the grid?

Seneca Generation LLC interconnects at Glade.

How does Seneca Generation LLC compare to other plants?

By capacity, Seneca Generation LLC ranks #16 of 39 operating plants of the same technology nationally. It ranks #2 of 2 in PA.

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Hydroelectric Pumped Storage, Conventional HydroelectricPJM · Warren County

Seneca Generation LLC

Warren County · PJM

Seneca Generation LLC is a battery energy storage facility with 437.9 MW of EIA-reported nameplate capacity in Warren County, Pennsylvania, registered as EIA Plant ID 8225. The EIA plant record ranks Seneca Generation LLC #54 in the United States and #2 in Pennsylvania by plant capacity. FERC identifies the associated Kinzua project as a hybrid facility with two reversible pump-turbines and one conventional hydroelectric unit.

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plant:plant-8225

Ask about Seneca Generation LLC

Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.

Overview

Key fields

Reported capacity: 437.9 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Hydroelectric Pumped Storage, Conventional Hydroelectric
Primary generation technology.
Registry anchor: Plant 8225
Warren County · PJM
Operating status: Operating
Grid connection: Glade
230 kV

Infrastructure record

Operator: Seneca Generation LLC

Profile

Grid role: Pumped-storage energy management and load leveling, including off-peak pumping and peak-period generation, with conventional hydroelectric generation capability.
Grid connection: Glade · 230 kV.
Context: The EIA plant record ranks Seneca Generation LLC #54 in the United States and #2 in Pennsylvania by plant capacity. FERC identifies the associated Kinzua project as a hybrid facility with two reversible pump-turbines and one conventional hydroelectric unit.
Physical build: The Kinzua Pumped Storage Hydroelectric Project at Kinzua Dam on the Allegheny River in Warren County, Pennsylvania, includes a powerhouse with two reversible pump-turbines and one conventional hydro unit, with 451,800 kW of installed project capacity. The physical scope also includes the Allegheny Reservoir intake, an upper reservoir with 5,697 acre-feet of usable storage, water-conveyance tunnels and penstocks, a transmission line to the Glade substation, and appurtenant operating equipment. A technical plant presentation identifies the three units as Unit 1 at 218 MW, Unit 2 at 195 MW, and Unit 3 at 30 MW; current EIA-based records list three operational units and 437.9 MW of nameplate capacity.

Structured profile

Reported capacity: 437.9 MW
Hydroelectric Pumped Storage, Conventional Hydroelectric
Operating status: operating
Seneca Generation LLC is operating.
Interconnection: Glade
230 kV
Location: Warren County
PJM
Asset role

Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
1	205.9 MW 225.4 MW summer	Hydroelectric Pumped Storage Water · PS	Jun 1970	Operating
2	205.9 MW 208.1 MW summer	Hydroelectric Pumped Storage Water · PS	Jun 1970	Operating
3	26.1 MW 29.9 MW summer	Conventional Hydroelectric Water · HY	Jun 1970	Operating

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 411.8 MW
National rank: #16
PA rank: #2

Monthly generation

Download CSV

Latest 12 months

-344.9 GWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

—

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Nearby substations

HIFLD infrastructure inventory

UNKNOWN123540

IN SERVICE · 230 kV

0.0 km

GLADE

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Transactions and agreements

Ownership Contribution

Jul 20, 2021

Seneca Hydro (indirect owner of Seneca Generation Facility via Harbor Hydro Intermediate Holdings) was contributed to Rev Renewables, LLC on July 20, 2021 as part of LS Power's portfolio contribution transaction. SEC filing reports aggregate contribution-transaction cost for multiple facilities but does not allocate total to Seneca, so no amount assigned.

Harbor Hydro Intermediate Holdings, LLC · Rev Renewables, LLC · LS Power Equity Partners II, LP

Source

Proposed Reactive-Service Rate Settlement

Jul 11, 2023

Seneca Generation proposed an annual total revenue requirement of $1,485,000 for reactive capability under PJM Schedule 2 in an offer of settlement. The filing describes the Seneca facility as a 513 MW pumped-hydroelectric storage facility in Warren, Pennsylvania. This was a proposed reactive-service revenue requirement, not a PPA, tolling agreement, or fixed-term offtake contract.

$1.5M513 MW contractedSeneca Generation, LLC · PJMSettlement

Source

Land and environmental record

Environmental Review Milestone

Nov 3, 2014

FERC environmental assessment found no significant environmental effect with protective measures

FERC staff reviewed the 451.8 MW Kinzua Pumped Storage Project environmental assessment and concluded that issuing a new license with appropriate environmental protective measures would not be a major federal action significantly affecting the human environment.

Federal Register, Volume 79 Issue 212 (Monday, November 3, 2014)

Existing Project Land

May 6, 2014

226.7 acres of federal land

The existing Kinzua Pumped Storage Project occupies 226.7 acres of federal land: 212.1 acres administered by the U.S. Forest Service and 14.6 acres administered by the U.S. Army Corps of Engineers.

Federal Register :: Seneca Generation, LLC; Notice of Application Accepted for Filing, Soliciting Motions To Intervene and Protests, Ready for Environmental Analysis, and Soliciting Comments, Recommendations, Preliminary Terms and Conditions, and Preliminary Fishway Prescriptions

Federal Land Administration

May 6, 2014

14.6 acres administered by the U.S. Army Corps of Engineers

Existing project federal land includes 14.6 acres administered by the U.S. Army Corps of Engineers.

Federal Land Administration

May 6, 2014

212.1 acres administered by the U.S. Forest Service

Existing project federal land includes 212.1 acres administered by the U.S. Forest Service.

Industrial Wastewater Permit

Dec 1, 2023

NPDES Permit PA0005045

Pennsylvania DEP issued industrial wastewater NPDES Permit PA0005045 for the Seneca Generating Station at 500 Powerhouse Drive, Warren, Pennsylvania. The permit became effective December 1, 2023 and expires November 30, 2028.

AUTHORIZATION TO DISCHARGE UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM DISCHARGE REQUIREMENTS FOR INDUSTRIAL WASTEWATER FACILITIES

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

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AssetOwner / operatorFinancier

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Jun 1970
Jun 1970
Generators enter operationEIA-860
EIA-860 lists generator 1, generator 2, generator 3 with this operating date.
Nov 2013
Nov 2013
FERC Sale Authorization

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Overview

Key fields

Infrastructure record

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about Seneca Generation LLC

How big is Seneca Generation LLC?

What kind of plant is Seneca Generation LLC?

Where is Seneca Generation LLC located?

Who operates Seneca Generation LLC?

How much electricity does Seneca Generation LLC generate?

Where does Seneca Generation LLC connect to the grid?

How does Seneca Generation LLC compare to other plants?

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