| MGModerne Glass CO INC | Aliquippa | — | ◐ LIKELY ACTIVE |
| MSMt Savage Spec Ref/curwensville Plt | Curwensville | — | ◐ LIKELY ACTIVE |
| M1Multiserv/plt 18 Steelton | Steelton | — | ◐ LIKELY ACTIVE |
| NFNatl Fuel Gas Supply/lamont Comp Sta | Kane | — | ◐ LIKELY ACTIVE |
| PHPinnacle Health/harrisburg Hosp | Harrisburg | — | ◐ LIKELY ACTIVE |
| QCQuikrete CO Inc/harrisburg Plt | Paxinos | — | ◐ LIKELY ACTIVE |
| RCRahns Concrete Batch Plant | Rahns | — | ◐ LIKELY ACTIVE |
| RCRc Concrete | Burgettstown | — | ◐ LIKELY ACTIVE |
| RPResco Products Inc/new Castle Plant | New Castle | — | ◐ LIKELY ACTIVE |
| RCRiverside Constructions Materials | Bristol | — | ◐ LIKELY ACTIVE |
| RRoyersford | Royersford | 20–99 | ◐ LIKELY ACTIVE |
| RHRwe Holding CO - West Pittsburg Plant | New Castle | — | ◐ LIKELY ACTIVE |
| SCSaint-Gobain Ceramics | Olyphant | 20–99 | ◐ LIKELY ACTIVE |
| SBSilhol Builders Supply | Bridgeville | 20–99 | ◐ LIKELY ACTIVE |
| SCStone & CO INC Canonsburg Plt | Canonsburg | — | ◐ LIKELY ACTIVE |
| TBThe Bauer Company INC. | Worthington | 20–99 | ◐ LIKELY ACTIVE |
| UCUniontown Concrete Plt | Hopwood | — | ◐ LIKELY ACTIVE |
| UCUniversal Concrete Products Corporation | Stowe | 100–499 | ◐ LIKELY ACTIVE |
| UGUS Gypsum Washingtonville | Danville | 100–499 | ◐ LIKELY ACTIVE |
| WKWorld Kitchen LLC - Charleroi Plant | Charleroi | — | ◐ LIKELY ACTIVE |
| AMAllegheny Mineral Harrisville | Harrisville | — | ◐ LIKELY ACTIVE |
| ACAlumina Ceramic Components INC | Latrobe | 1–19 | ◐ LIKELY ACTIVE |
| AAAnchor an Oldcastle CO | Fredonia | — | ◐ LIKELY ACTIVE |
| ACAnchor Concrete Fredonia Plt | Fredonia | — | ◐ LIKELY ACTIVE |
| ATArconic Tech LLC - Arconic Tech Center | New Kensington | — | ◐ LIKELY ACTIVE |
| BIBbgy INC Dba Boger Concrete Company | Annville | — | ◐ LIKELY ACTIVE |
| BIBlend-pro INC | Allentown | — | ◐ LIKELY ACTIVE |
| BIBpi Inc-greenville Pa Plant | Greenville | — | ◐ LIKELY ACTIVE |
| BIBpi INC - Schenley Pa Plant | Schenley | — | ◐ LIKELY ACTIVE |
| DCDaniels Concrete Batch Plt | Greensburg | — | ◐ LIKELY ACTIVE |
| DRDevido Ranier Stone CO | New Castle | 1–19 | ◐ LIKELY ACTIVE |
| DSDoolittle Stone Saw Shop | Montrose | — | ◐ LIKELY ACTIVE |
| DEDown East Fabrication, Inc. | Mechanicsburg | 20–99 | ◐ LIKELY ACTIVE |
| DCDu CO Ceramics Co/saxonburg | Saxonburg | — | ◐ LIKELY ACTIVE |
| ECEastern Concrete Materials INC Dba Architectural Precast | Middleburg | 20–99 | ◐ LIKELY ACTIVE |
| ESEldorado Stone - Greencastle (antrim Commons) | Greencastle | — | ◐ LIKELY ACTIVE |
| EHEp Henry | Parker Ford | — | ◐ LIKELY ACTIVE |
| EEEvans Eagle Burial Vaults Mfg Leola | Leola | — | ◐ LIKELY ACTIVE |
| GHGeneration Holdings Lp/colver Processing Fac | Colver | — | ◐ LIKELY ACTIVE |
| GGGlen Gery Corporation Reading Plant | Wyomissing | 500+ | ◐ LIKELY ACTIVE |
Hanover Prest Paving Brick Plt | Hanover | — | ◐ LIKELY ACTIVE |
| HCHma Concrete LLC Dba Heritage Concrtete Avondale Facility | Avondale | — | ◐ LIKELY ACTIVE |
| IMIsp Minerals Charmian Quarry | Blue Ridge Summit | — | ◐ LIKELY ACTIVE |
| LCLafarge CORP Duquesne_plant | Pittsburgh | — | ◐ LIKELY ACTIVE |
| MLMercer Lime & Stone CO | Slippery Rock | — | ◐ LIKELY ACTIVE |
| MKMurray Keystone Processing Inc/keystone Cleaning Plt | Indiana | — | ◐ LIKELY ACTIVE |
| NFNatl Fuel Gas Supply/east Fork Comp Sta | Austin | — | ◐ LIKELY ACTIVE |
| NFNatl Fuel Gas Supply/ellisburg Sta | Ellisburg | — | ◐ LIKELY ACTIVE |
| NCNitterhouse Concrete Prod | Chambersburg | — | ◐ LIKELY ACTIVE |
Oldcastle Infrastructure Inc/telford | Telford | — | ◐ LIKELY ACTIVE |