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Conemaugh — Power plant · Coal · KEYCON OPERATING LLCHomer City Generating Station — Gas, combined cycle · PA · 4,396 MW · 18.3 km awayStony Creek Solar — Solar · PA · 15 MW · 23.6 km away
  • Combustion
  • Wind & solar
  • In development
  • Operating
  • 10 · 100 · 1,000 MW

Conemaugh

Power plant · Coal

Key facts

Power plant · Coalran 23% of 2025 Operating
Capacity
Capacity: sourceEIA-860M · Open licenseMW
Commissioned
1970
Net generation, 2025
3,910,290 MWh
Grid
500 kV to Pennsylvania Electric Co (PJM)
Location
Indiana County, Pennsylvania

Output

Net generation MWh by year, 2001 to 2026
Fuel burned MMBtu by year, 2001 to 2026
  • Gas
  • Coal
  • Oil

Operations detail

Details

Who’s behind it

Owner
ArcLight Capital Holdings LLC, Chief Conemaugh Power LLC, Chief Conemaugh Power II, LLC and 6 more

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Technology
Coal source: “Conventional Steam Coal”
Age
56 years since 1970
Unused energy
13,286 GWh 2025Unused energyA lead, not a guarantee: MW × hours × (1 − capacity factor) for the latest year (EIA-923), gas, coal and oil plants only. Air-permit run-hour caps, heat rate (cost to run) and capacity-market or reliability obligations can rule it out.
Heat rate
10,371 Btu/kWh 2025
All 9 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
AttributeValue
Gem
Parents
Name
Chief Conemaugh Power LLC
Share pct
35.10
Gem entity id
E100001001229
Name
Talen Energy Corp
Share pct
22.20
Gem entity id
E100000002328
Name
Conemaugh Power Pass-Through Holders LLC
Share pct
16.40
Gem entity id
E100001001261
Name
ArcLight Capital Partners LLC
Share pct
11.20
Gem entity id
E100000001143
Name
ACH GP LLC
Share pct
5.60
Gem entity id
E100002022053
Name
ACHP II LP
Share pct
2.80
Gem entity id
E100002022052
Name
ACHP LP
Share pct
2.80
Gem entity id
E100002022051
Unit ids
G100000101689, G100000101690
Location id
L100000104137
Grid
Nerc region
RFC
Report year
2025
Grid voltage kv
500
Transmission owner
Pennsylvania Electric Co
Balancing authority code
PJM
Balancing authority name
PJM Interconnection, LLC
EPA greenhouse gas reporting (GHGRP)
EPA FRS ID
110000538801
Subparts reported
C, D
NAICS code
221112
Subpart PP (CO2 supply)
No
Subpart RR (geologic sequestration)
No
Subpart UU (CO2 injection)
No
Reporting year
2023
GHGRP facility ID
1000877
Eia status
By code
OP
Mw
1,951
Units
2
SB
Mw
12
Units
4
Standby mw
12
Status rule
some_units_idle
In service mw
1,963
Out of service mw
0
Fuel burned (MMBtu), 202540,552,098
Capacity factor, 20250.227
Heat rate (Btu/kWh), 202510,370.6
Net generation (MWh), 20253,910,290.0
Balancing authority codePJM

Ownership

9 companies10
CompanyRoleShareAs ofSource
Chief Conemaugh Power II, LLC Owner 22.5% 31 Dec 2025 EIA-860
Chief Conemaugh Power LLC Owner 35.1% 31 Dec 2025 EIA-860
Montour LLC Owner 22.2% 31 Dec 2025 EIA-860
Conemaugh Power Pass-Through Holders LLC Owner 16.4% 31 Dec 2025 EIA-860
Conemaugh Power LLC Owner 3.7% 31 Dec 2025 EIA-860
ARCLIGHT CAPITAL HOLDINGS LLC Owner 57.6% 31 Dec 2023 EPA GHGRP
BOWFIN KEYCON POWER LLC Owner 3.7% 31 Dec 2023 EPA GHGRP
TALEN ENERGY CORP Owner 22.2% 31 Dec 2023 EPA GHGRP
KEYCON OPERATING LLC Owner 16.4% 31 Dec 2023 EPA GHGRP
KEYCON OPERATING LLC Operator EIA-860M

Timeline

  • In service · EIA-860M

Sources

6 sources

Sources EIA-860M · GEM · EIA · EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT) · EIA-860M Preliminary Monthly Electric Generator Inventory

Sources

Every source and license · Attribution

View at source

Around this plant

Nearby

within 25 km
ProjectKindAwayMW
Homer City Generating Station Announced Gas, combined cycle 18.3 km 4,396
Stony Creek Solar Permitted Solar 23.6 km 15

Sources EIA-860M

Sources

Attribution