Greene County, PA
Longwall Mining, Act 54, and Mineral Rights in Greene County, Pennsylvania
Two separate, well-documented subsurface industries -- active longwall coal mining and Marcellus/Utica shale gas -- both run beneath Greene County today, not just in its history. Here is what each one actually means for a specific parcel, and the one Pennsylvania law that gives you real recourse if mining causes damage.
This page covers what's specific to Greene County. For the general explanation, see the national guide.
Why Greene County is different: active, not historical, longwall mining
Most of Pennsylvania's coal-mining history is exactly that -- history, with abandoned mines that stopped producing decades ago. Greene County is one of only two Pennsylvania counties, alongside neighboring Washington County, where DEP's own reporting documents active longwall coal mining continuing today. Longwall mining extracts a full coal seam in long panels using mobile hydraulic supports, and by design it lets the ground surface above subside in a predictable, immediate way as each panel is completed -- unlike older room-and-pillar mining, which can leave unstable voids that collapse unpredictably years or decades later (the pattern documented for this project's neighboring Fayette County coverage).
CONSOL Energy's Bailey Mine, one of the active longwall operations reaching beneath Greene County, alone undermines an area described as roughly 144 square miles of rural terrain here -- a scale that makes it a realistic consideration for a large share of the county's rural land, not an isolated exception.
The documented damage, and a real park-lake loss
The cumulative, documented effects of longwall mining in Greene and Washington counties combined are substantial and specific, not vague or anecdotal. Since 1984, an estimated 650 homes in the two counties have been undermined. A five-year survey period found 683 wells, springs, or ponds damaged by subsidence, with 234 of those cases still unresolved at the time of that reporting -- meaning water-supply loss, not just structural cracking, is a real, recurring category of harm here. One DEP report cited in this reporting found that eight operating longwall mines caused 94% of the damage documented to 456 surveyed structures and 89% of the land impacts across 108 surveyed properties.
The single most vivid, verifiable example is Ryerson Station State Park in Greene County, which lost its 62-acre Duke Lake in 2005 after the lake's dam cracked once a longwall mining panel had passed directly beneath the park -- a loss that Pennsylvania state park officials and multiple environmental reporters have documented and referenced repeatedly since, and a useful, concrete illustration of what "surface subsidence" can actually mean on the ground.
Act 54: a real statutory remedy, and how to use it
Pennsylvania's Act 54 requires the coal company actively conducting longwall mining beneath a property to repair or financially compensate for resulting structural damage to buildings and loss of water supply -- a specific, currently-in-force legal obligation, not a discretionary courtesy. If you're evaluating a Greene County parcel, it's worth asking DEP's district mining office directly whether the parcel sits within a currently permitted or planned longwall mining area, since that status can change as a company's mine plan advances panel by panel over years. If subsidence damage does occur after you own the property, Act 54 is the specific law to invoke, and DEP's mining office is the point of contact for documenting a claim against the operating company.
Separately, Greene County's status as one of Pennsylvania's leading Marcellus/Utica shale-gas counties (alongside Susquehanna, Washington, and Bradford counties, together producing roughly 40% of the Appalachian Basin's 2022 gas output) means a title search at the Greene County Register and Recorder is essential for a second reason entirely independent of coal: confirming whether oil and gas rights have been severed from the surface, whether an active lease exists, and whether any well pad, pipeline, or access easement already burdens the parcel. Pennsylvania recognizes surface, mineral, and (in coal country) a separate support estate as three distinct, independently ownable interests in the same tract -- and Greene County is a place where all three can genuinely be in play on a single parcel at once.
Ready to talk to someone who knows land?
Tell us what you're trying to do and we'll connect you with a local land specialist -- someone who understands zoning, perc, and access, not just listings.
Connect with a local land specialistSources
- State report details longwall mining damage — Pittsburgh Post-Gazette (accessed 2026-09)
- Report faults DEP for mine subsidence oversight in western Pa. — WITF / StateImpact Pennsylvania (accessed 2026-09)
- Assessing the Damage from Mining: a 5 Year Report — The Allegheny Front (accessed 2026-09)
- Final Report - Effects of Longwall Mining — Pennsylvania Department of Environmental Protection (accessed 2026-09)
- New scrutiny of "longwall" mining finds damage in Pennsylvania streams — Center for Public Integrity (accessed 2026-09)
- Coal Mining Updates in Greene and Washington Counties — Center for Coalfield Justice (accessed 2026-09)
- U.S. Energy Information Administration -- Appalachian Basin natural gas production — U.S. Energy Information Administration (accessed 2026-09)
Last reviewed 2026-09