Armstrong Power Station

“Located at 108 Power Plant Rd, Adrian, PA 16210 (coordinates 40°55'45.0"N 79°27'58.5"W), this 32-acre former coal plant on the Allegheny River retired in 2012 and has a retired capacity of 326.4 MW (see infrastructure and is still owned by FirstEnergy via Allegheny Energy Supply Company, LLC. Decommissioning remains in the planning stages, and remediation is in progress. It is currently not zoned for any particular use and has ~460 acres of adjacent available land, but the terrain is rated as highly rugged. The site is treated as a presumptive brownfield, has confirmed on-site soil contamination, and TBD groundwater contamination. FEMA designates the site as having a very low natural hazard risk but sitting within the floodway. The parcel is not located within a known coal mining area and is, therefore, considered to have minimal mine subsidence potential; however, nearby parcels fall within a documented mineable coal area with potential mine subsidence risk. The site has immediate access to rail and the river, and a major highway runs within 5 miles of the site. Transmission lines and a substation are present within 1 mile, and a natural gas pipeline exists ~3 miles away. The site is located on the Marcellus shale formation. Broadband is installed ~4.5 miles away, and the nearest wastewater treatment site is just over 6 miles away. The nearest generator is ~20 miles away, and the nearest brownfield site is ~15 miles away. There are ~369,926 people living within 30 miles of the site.”

PATER Part A report, section 4.2, page 36

Report name

Armstrong Power Station

Address

108 Power Plant Rd, Adrian, PA 16210

Coordinates

40°55'45.0"N 79°27'58.5"W

Fuel

Bituminous Coal

Zoning

Special

Ruggedness

5 = Highly rugged

Brownfield designation

Presumptive

On-site contamination

Confirmed

Groundwater contamination

TBD

FEMA natural hazards risk

Very low

FEMA flood hazard

Floodway

Population within 30 miles

About 369,926 (report estimate)

PJM transmission zone

APS

Evaluated for

New generation or large load

The report evaluated sites in the APS transmission zone for both new generation and new large loads, because the difference between expected load and generation there was marginal (page 79).

Current status

Part A candidate. Part B will narrow the 21 sites to 5 to 7 priorities.

Next step

Part B will rank the sites and validate the top 5 to 7 through site visits (page 103).

Public comment

Written comments on Part A are accepted under PUC Docket No. M-2026-3059601 through October 14, 2026.

Review meetings

The report says PATER Study Review Meetings are planned for October and February (page 103).