Acme

• Montana-Dakota Utilities Company

Alma

• Wyoming Coal and Iron Company

Atlantic City

• Atlantic City Ore Mine
• US Steel Corporation

Bitter Creek

• Colorado Oil & Gas

Bridger

• Montana-Dakota Utilities Gas

Buffalo

• Buffalo Northwest Electric Company

Cambria

• Cambria Fuel Company

Casper

• Amoco Oil Company
• Casper Supply Company
• Chicago, Burlington and Quincy Railroad Company
• Construction Specialties Company
• Fargo Oil Company
• Husky Oil Company
• Investors Oil Company
• Midwest Refining Company
• Mobil Oil Company
• Mountain States Power Company
• Natrona County Electric Company
• Pacific Power and Light Company
• Pancratz Company
• Petrontomics Company
• Power Service Corporation
• Producers and Refiners Corp
• Provident Savings & Loan
• Rocky Mountain Carpot
• Sacony Mobil Oil Company
• Socony Vacuum Oil Company
• Standard Oil Company
• Standard Oil Company of Indiana
• Standard Oil Refinery
• Texaco Oil Refinery
• Texas Company
• Union Tank Car Company
• Weskem
• White Eagle Oil Corporation

Cheyenne

• DePaul Hospital
• Fisk Engineering
• Frontier Refining Company
• Husky Oil Company
• Memorial Hospital
• Municipal Airport
• Northern Colo Light and Power Company
• Plateau Supply Company
• Sheet Metal Products Company
• Union Pacific Plant
• Union Pacific Railroad Company
• Wycon Chemical Plant
• Wycon Chemical Refinery

Cody

• Husky Refining Company
• Texas Company

Cumberland

• Union Pacific Coal Company

Diamondville

• Diamond Coal and Coke Company

Encampment

• Penn Wyoming Copper Company

Evanston

• Becker Brewing & Malting Company
• Chevron, United States of America, Inc.
• Union Pacific Railroad Company
• Wyoming State Hospital

Evansville

• Little America Refining
• Texaco Oil Refinery Wyoming

Fort Laramie

• Stanolind Pipe Line Company

Frontier

• Frontier Supply Company

Gebo

• Gebo Coal Company
• Owl Creek Coal Company

Gillette

• Black Hills Generation
• Black Hills Power Inc
• Pacificorp
• Wyodak Coal and Manufacturing Company

Glen Rock

• Cabot Carbon Company
• Continental Oil Company
• Dave Johnson Power Plant
• Glen Rock Powerhouse
• Mutual Oil Company
• Pacificorp
• Pacific Power and Light Company
• Powerhouse
• Steam Power Plant

Granger

• Stanolind Pipe Line Company

Granger Station

• Utah Oil Refining Company

Green River

• Allied Chemical Plant Wyoming
• Allied Chemical Station
• Food Machinery and Chemical Corp (FMC)
• Mountain State Insul
• Pacific Power Company
• Soda Ash Plant
• Solvay Process Division
• Stauffer Chemical Company
• T.W. Boyer
• Union Pacific Railroad Company
• Utah Power and Light

Greybull

• Midwest Refining Company

Hanna

• Union Pacific Coal Company

Inez

• Teapot Coal Company

Kemmerer

• Food Machinery and Chemical Corporation
• Kemmerer Coal Company
• Naughton Station
• Pacificorp
• Utah Power & Light Company

Kirby

• Gebo Coal Company
• Shipping Station

Lander

• Lander Electric Light and Power Company

Laramie

• Alumina Plant
• California Pipeline Company
• Church of Jesus Christ of Latter Day Saints
• Colo Tires and Iron Company
• Forest Products Treating Company
• Midwest Refining Company
• Monolith Portland Midwest Company
• Union Pacific Railroad Company
• Union Pacific System
• United States Bureau of Mines
• University of Wyoming
• University of Wyoming Residence Halls

Leefe

• San Francisco Chemical Company

Lincoln County

• Plant Unit Number 2
• Utah Power and Light Company

Lorance

• Colo Fuel and Iron Company

Lovell

• Great Western Sugar Company

Manderson

• Jefferson Lake Sulphur Company

Manville

• Continental Oil Company

Medicine Bow

• Utah Oil Refining Company

Midwest

• Continental Oil Company

Mommoth Camp

• Midwest Refining Company

New Castle

• Consumer Oil & Refining Company

Newcastle

• Wyoming Refining

Oakley

• Diamond Coal and Coke Company

Opal

• El Paso Natural Gas Company

Osage

• Black Hills Power and Light Company

Parco

• Producers and Refiners Corp
• Sinclair Oil
• Sinclair Refining Company

Powell

• S & H Construction Company

Rawlings

• Union Pacific Railroad Company

Rawlins

• Kaiser Engineers, Inc.

Reliance

• Union Pacific Coal Company

Riverton

• Northern Utilites Company
• Pan American Petroleum Corporation
• Winklemen Dome Field

Rock Springs

• Bridger Power Plant
• Central Coal and Coke Company
• Fmc Corporation
• Jim Bridger Power Plant
• Lion Coal Company
• Pacific Power & Light Company
• State Board of Charities and Reformatories
• Union Pacific Coal Company
• Wyoming State Hospital

Sage

• Stauffer Chemical Plant Wyoming

Salt Creek

• Midwest Refining Company
• Salt Creek Central Power Station

Sheridan

• Acme Plant
• J. W. Denio Milling Company
• Montana Dakota Utilities Company
• Perkins Power Company
• Sheridan County Electric Company
• Sheridan Sugar Company

Shute Creek

• Exxon

Sinclair

• Sinclair Oil Company
• Sinclair Refining Company

South Torrington

• Holly Sugar Corporation

Stauffer

• Stauffer Chemical Company
• Winston Brothers Company

Sweetwater

• Tenneco Oil Company

Teapot

• Midwest Refining Company

Terrington

• Holly Sugar Corp

Thermopolis

• Empire State Oil Company
• Hot Springs Light and Power Company

Wallace

• Boise Cascade Kraft Corporation

Wamsutter

• Stanolind Pipe Line Company
• Utah Oil Refining Company

Westvaco

• Food Machinery and Chemical Corporation
• For Food Machinery Corp
• Ford Machinery and Chemical Company
• Inorganic Chemicals Div
• Intermoutain Chemical
• West Vaco Chemical Division
• West Virginia Power Company

Wheatland

• Basin Electric Power Coop
• Great Western Sugar Company
• Laramie River Power Plant

Whitney Canyon

• Amoco Production Company

Winton

• Union Pacific Coal Company

Worland

• Hollly Sugar Corp
• Pure Oil Company
• Texas Gulf Sulphur Company
• Wyoming Sugar Company

Wyco

• Wyco Chemical Company

Wyodak

• Black Hills Power and Light Company
• Homestead Mining Company
• Wyodak Coal and Manufacturing Company
• Wyodak Plant, Black Hills Pwr & Light Company