| Duquesne Power Plant |
Aliquippa |
| United States Steel Corp. |
Allenport |
| Penn Central Railroad |
Altoona |
| Penn State College |
Altoona |
| Armco Steel-Ambridge Works Plant |
Ambridge |
| U.S. Steel Mill |
Ambridge |
| Babcock & Wilcox Seamless Tube Plant |
Beaver Falls |
| Bethlehem Steel Mill |
Bethlehem |
| Allegheny Aluminum Plant |
Brackenridge |
| United States Steel Mill - Edgar Thompson Plant |
Braddock |
| Kendall Refinery |
Bradford |
| Bristol Steel Mill |
Bristol |
| Rohm & Haas Chemical Plant |
Bristol |
| Armco Steel Mill |
Butler |
| General Electric Plant |
Canonsburg |
| Scott Paper Mill |
Chester |
| Sun Shipbuilding Shipyard |
Chester |
| United States Steel - Clairton Works |
Clairton |
| Shawville Power Plant |
Clearfield |
| Allenwood Steel Company |
Conshohocken |
| Steel Mill |
Conshohocken |
| Pittsburgh Plate (PPG) Glass Plant |
Creighton |
| New York Gas Compressor Station |
Delmont |
| Peach Bottom Atomic Power Station |
Delta |
| Peach Bottom Nuclear Power Plant |
Delta |
| Warner Concrete Plant |
Devault |
| United States Steel - Irving Plant |
Dravosburg |
| United States Steel Mill - Duquesne Works |
Duquesne |
| State School |
Ebensburg |
| Philadelphia Electric Company (PECO) Eddystone Station Power Plant |
Eddystone |
| Elrama Power Plant |
Elrama |
| General Electric Transportation Systems Locomotive Plant |
Erie |
| Hammermill Paper Mill |
Erie |
| U.S. Steel Mill - Fairless Works |
Fairless Hills |
| Allied Signal Chemical Plant |
Frankford |
| Copperweld Steel Rod & Wire Mill |
Glassport |
| United States Glass Plant |
Glassport |
| Pennsylvania Railroad |
Harrisburg |
| Three Mile Island Nuclear Power Plant |
Harrisburg |
| Homer City Power Generating Station |
Homer City |
| Mesta Machine Steel Machinery Manufacturing Plant |
Homestead |
| Willow Grove Navan Air Station and Joint Reserve Base |
Horsham |
| Owens-Corning Fiberglass Plant |
Huntingdon |
| Bethlehem Steel Mill |
Johnstown |
| Conemaugh Power Plant |
Johnstown |
| ALCOA Aluminum Rolled Products Plant |
Lancaster |
| Armstrong Flooring Plant |
Lancaster |
| Cleaver Brooks Boiler Plant |
Lebanon |
| Bethlehem Steel Co. |
Leetsdale |
| Bethlehem Steel Mill |
Leetsdale |
| Hussey Copper Plant |
Leetsdale |
| Westinghouse Turbine Plant |
Lester |
| Sun Oil (Sunoco) Refinery |
Marcus Hook |
| Martins Creek Power Plant |
Martins Creek |
| Hatfield’s Ferry Power Plant |
Masontown |
| United States Steel Tublar Products Plant |
Mckeesport |
| Crucible Steel Plant - LTV Specialty Steel Products Plant |
Midland |
| Sinclair - Koppers Chemical Plant |
Monaca |
| St. Joseph Minerals Zinc Smelter |
Monaca |
| Wheeling-Pittsburgh Steel Mill |
Monessen |
| Mitchell Power Station |
Monongahela |
| Boeing Helicopter Plant |
Morton |
| Dravo Shipyard |
Neville Island |
| United States Steel Mill |
Neville Island |
| New Castle Power Generating Station |
New Castle |
| Barbados Island Power Plant |
Norristown |
| B. F. Goodrich Tire & Rubber Plant |
Oaks |
| New Jersey Zinc Refinery Smelter |
Palmerton |
| Peach Bottom Nuclear Power |
Peach Bottom |
| A.P. Green Plant |
Philadelphia |
| Allied Chemical Plant |
Philadelphia |
| Amstar Sugar Refinery |
Philadelphia |
| Chevron Oil Refinery |
Philadelphia |
| General Electric Manufacturing Plant |
Philadelphia |
| Heintz Manufacturing Plant |
Philadelphia |
| Inquirer Building Press Room |
Philadelphia |
| Johnsonville Naval Air & Research Center |
Philadelphia |
| Mathis Shipyard |
Philadelphia |
| National Sugar Refinery aka Jack Frost Sugar |
Philadelphia |
| Penn Center Building |
Philadelphia |
| Philadelphia Naval Yard |
Philadelphia |
| Rohm & Haas Chemical Plant |
Philadelphia |
| Sun Oil (Sunoco) Refinery - Chevron Refinery and Atlantic Refinery |
Philadelphia |
| Temple University |
Philadelphia |
| Temple University Hospital |
Philadelphia |
| Temple University Mental Health Facility |
Philadelphia |
| The Budd Company Automotive and Railcar Assembly Plant |
Philadelphia |
| U.S. Naval Damage Control Training Center |
Philadelphia |
| University Of Pennsylvania |
Philadelphia |
| Cromby Generating Station |
Phoenixville |
| American Bridge Shipyard |
Pittsburgh |
| Armco Steel-Pittsburgh |
Pittsburgh |
| Carnegie Technical School |
Pittsburgh |
| Gateway Center |
Pittsburgh |
| Golf Tower |
Pittsburgh |
| H.J. Heinz Manufacturing Plant |
Pittsburgh |
| J & L Steel |
Pittsburgh |
| Pittsburgh Plate Glass (PPG) World Headquarters Building |
Pittsburgh |
| U.S. Steel Mill |
Pittsburgh |
| United States Steel Headquarters Building |
Pittsburgh |
| Westinghouse Plant |
Pittsburgh |
| Firestone Tire & Chemical Plant |
Pottstown |
| Rohm & Haas Powder Coatings Plant |
Reading |
| Boeing Aircraft Plant |
Ridley Township |
| National Castings Foundry |
Sharon |
| Sharon Steel |
Sharon |
| Sharon Tube Company |
Sharon |
| Beaver Valley Nuclear Power Plant |
Shippingport |
| Bruce Mansfield Power Plant |
Shippingport |
| Glatfelter Pulp and Paper Mill |
Spring Grove |
| Cheswick Generating Station Power Plant |
Springdale |
| Duncan & Miller Glass Plant |
Washington |
| Jessop Specialty Steel Mill |
Washington |
| Washington Steel Mill |
Washington |
| CertainTeed Plant |
York |
| Pennsylvania Shipyard Inc |
Beaumont |
| Atomic Power Plant |
Beaver |
| Beaver Valley Power Plant |
Beaver Valley |
| Bethlehem Steel |
Bethlehem |
| Dukane Power & Light |
Burros Island |
| Pittsburgh Steel |
Charleroi |
| US Steel |
Christy Park Works |
| Clairton Coke Works |
Clairton |
| Crown Cork |
Conchahaka |
| Owens Corning |
Croyten |
| US Steel |
Dufuense |
| Snow & Sons Construction |
Duke Center |
| West Penn Power Office Building |
Greensburg |
| Jam River Pulp Mill |
Harrisburg |
| US Steel |
Hibbing |
| US Steel |
Homestead |
| US Steel Corp |
Homestead |
| Air Reduction Company |
Johnstown |
| Sun Oil |
Marcus Hook |
| Fairless Steel Mill |
Morrisville |
| US Steel |
Morrisville |
| Pittsburgh Plate & Glass |
New Kensington |
| Scehneley Distillery Company |
New Kensington |
| Alcoa Aluminum Lab |
New Kingston |
| Pittsburgh Coke Chemical |
Newel Island |
| Pittsburgh Glass |
Oil City |
| Phil Shipyard |
Philadelphia |
| Philadelphia Electric |
Philadelphia |
| Philadelphia Naval Shipyard |
Philadelphia |
| Sun Shipyard |
Philadelphia |
| US Naval Shipyard |
Philadelphia |
| 40th & Butler Terminal Building |
Pittsburgh |
| Alcoa Laboratory |
Pittsburgh |
| Building Maintenance & Engineering Corporation |
Pittsburgh |
| Continental Can Co |
Pittsburgh |
| Decamos Corp |
Pittsburgh |
| Dick Corporation |
Pittsburgh |
| Dravo Shipbuilding Corp |
Pittsburgh |
| Duquesne Light & Power |
Pittsburgh |
| Greater Pittsburgh Airport |
Pittsburgh |
| J&L Steel |
Pittsburgh |
| Pennsylvania Piping |
Pittsburgh |
| Pennsylvania Power Plant |
Pittsburgh |
| Pittsburgh Chemical |
Pittsburgh |
| Pittsburgh Press |
Pittsburgh |
| Spearhead Cabinet Shop |
Pittsburgh |
| St Clair Elementary |
Pittsburgh |
| St Clair Hospital |
Pittsburgh |
| St Clair Power Plant |
Pittsburgh |
| The May Department Stores Company |
Pittsburgh |
| University of Pittsburgh Medical Center |
Pittsburgh |
| US Steel |
Pittsburgh |
| USS Steel |
Pittsburgh |
| Firestone |
Pottstown |
| Dana Corp |
Reading |
| Reading Foundry |
Reading |
| Alloi Steel |
South Hampton |
| Fisher & Porter Steel |
South Hampton |
| AP Green Plant |
Springdale |
| PPG Paint |
Springdale |
| Chemical Plant |
Trainer |
| RCA Assembly Plant |
Washington |
| Fluor Corp |
Yorktown |
