How big is Essential Power Rock Springs LLC?

Essential Power Rock Springs LLC has a reported capacity of 795.6 MW. Source: EIA Form 860.

What kind of plant is Essential Power Rock Springs LLC?

Essential Power Rock Springs LLC is a Natural Gas Fired Combustion Turbine facility in Cecil County, MD, participating in the PJM market.

Where is Essential Power Rock Springs LLC located?

Essential Power Rock Springs LLC is in Cecil County, MD, inside the PJM balancing area.

Who operates Essential Power Rock Springs LLC?

Essential Power Rock Springs LLC is operated by Essential Power Operating Services LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Essential Power Rock Springs LLC generate?

Essential Power Rock Springs LLC reported 179 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.

Where does Essential Power Rock Springs LLC connect to the grid?

Essential Power Rock Springs LLC interconnects at Rock Springs Substation, on the PECO Energy Company system.

How does Essential Power Rock Springs LLC compare to other plants?

By capacity, Essential Power Rock Springs LLC ranks #29 of 825 operating plants of the same technology nationally. It ranks #1 of 8 in MD.

Ask the Grid

⌘K

Grids

Library

Explore

Roadmap

Preferences

Free account

Open the analytical workspace

Detailed market and asset intelligence, plus the tools to keep and share the work.

Settlement-point price analytics
Plant & battery operating detail
Full Radar & Deep agent mode
Saved views, history & exports

Enterprise

Read your own grid

Your assets, topology, and trades — one decision surface with the agent.

Connect your own data
Private Grid
Probabilistic model forecasts
Data downloads & exports

Talk to us

About · Legal · Privacy · Changelog

Natural Gas Fired Combustion TurbinePJM · Cecil County

Essential Power Rock Springs LLC

Cogentrix Energy Power Management LLC · Cecil County · PJM

Essential Power Rock Springs LLC is a natural gas-fired power facility with 795.6 MW of EIA-reported nameplate capacity in Cecil County, Maryland, registered as EIA Plant ID 7835. Essential Power Rock Springs LLC is the public owner or developer; Essential Power Operating Services LLC is the registered plant entity or operator. The plant's generating configuration is four air-cooled, simple-cycle, natural-gas-fired combustion turbines. Commercial operation began in November 2002. The facility interconnects at Rock Springs Substation at 500 kV.

Website Open in grid

Asset analyst

plant:plant-7835

Ask about Essential Power Rock Springs LLC

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

Overview

Key fields

Reported capacity: 795.6 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combustion Turbine
Primary generation technology.
Registry anchor: Plant 7835
Essential Power Operating Services LLC · Cecil County · PJM
Operating status: Operating
Essential Power Rock Springs LLC is operating.
Grid connection: Rock Springs Substation
500 kV · PECO Energy Company
Commercial operation: November 2002
Best-supported operating milestone.

Profile

Grid role: Simple-cycle natural-gas peaking generation
Grid connection: Rock Springs Substation · 500 kV · PECO Energy Company.
Physical build: Existing simple-cycle natural-gas facility with four General Electric 7 FA gas turbines (EU-1–EU-4), each nominally rated at 190 MW; two natural-gas-fired heaters rated at 7.5 and 9.0 MMBtu/hr; one 200-hp emergency diesel fire-water pump; and one 100-kW switchyard emergency diesel generator. The permit describes all eight units as operating, with dry low-NOx burners and one discharge stack per turbine.

Structured profile

Reported capacity: 795.6 MW
Natural Gas Fired Combustion Turbine
Commercial operation: November 2002
Operating status: operating
Essential Power Rock Springs LLC is operating.
Interconnection: Rock Springs Substation
500 kV · PECO Energy Company
Location

Units and generators

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

Generator	Capacity	Technology	Operation	Status
1	198.9 MW 167.3 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Jun 2003	Operating
2	198.9 MW 164.1 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Jun 2003	Operating
3	198.9 MW 169 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Jun 2003	Operating
4	198.9 MW

Performance

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

Peer context

Technology capacity: 795.6 MW
National rank: #29
MD rank: #1

Monthly generation

Download CSV

Latest 12 months

179 GWh

Reported net generation

Latest report

Dec 2024

EIA-923 monthly filing

2024 capacity factor

2.6%

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

ROCK SPRINGS

IN SERVICE · 500 kV

0.2 km

TAP139390

Commercial, land, and environmental record

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

Land and environmental record

Consumptive Water Use

May 8, 2025

0.262 million gallons per day

SRBC application lists both existing and requested consumptive use as 0.262 MGD (peak-day 30-day average) with projected design year of 2040.

Source

Permitted Equipment Discrepancy

2024

Permit search shows six GE 7FA turbines permitted; four turbines currently operating

MDE issued-permit search result describes facility as permitted for six GE 7FA turbines. Current 2024 renewal and 2025 SRBC application describe four operating air-cooled turbines. Four-unit description reflects current operating configuration; six-unit statement retained as permit-history discrepancy.

Maryland Department of the Environment - Maryland.gov

Site Area

May 11, 2001

Plant occupies approximately 26 acres of a 93-acre site

2001 federal environmental finding states plant occupies approximately 26 acres within 93-acre site.

24099

Transmission Parcel

May 11, 2001

5-acre adjacent parcel for transmission-line span

2001 federal finding identifies 5-acre parcel owned by Rock Springs Generation, LLC adjacent to plant site for short transmission-line span to existing 500-kV line.

24099

Wastewater Treatment

May 8, 2025

Wastewater routed to Wildcat Point for treatment and Susquehanna River discharge

SRBC application states Rock Springs wastewater routed to Wildcat Point for treatment and discharge to Susquehanna River under Wildcat Point's Pennsylvania DEP NPDES permit. Rock Springs NPDES permit number not stated.

Source

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

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetOwner / operatorOrganization

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Nov 2002
Nov 2002
Commercial operations reported by SRBCSource
The SRBC stated that Rock Springs began commercial operations in November 2002.
Jun 2003
Jun 2003

Essential Power Rock Springs LLC

Ask about Essential Power Rock Springs LLC

Essential Power Rock Springs LLC

Ask about Essential Power Rock Springs LLC

Overview

Key fields

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about Essential Power Rock Springs LLC

How big is Essential Power Rock Springs LLC?

What kind of plant is Essential Power Rock Springs LLC?

Where is Essential Power Rock Springs LLC located?

Who operates Essential Power Rock Springs LLC?

How much electricity does Essential Power Rock Springs LLC generate?

Where does Essential Power Rock Springs LLC connect to the grid?

How does Essential Power Rock Springs LLC compare to other plants?

Co-located assets

Related assets

Ironwood LLC

Marcus Hook Energy LP

Edge Moor

West Deptford Energy Station

Eddystone Generating Station

Wildcat Point Generation Facility