Arizona Narrow Gauge Railroad

Arizona and South Eastern Rail Road

Arizona Southern Railroad

El Paso & Southwestern Railroad

Helvetia Copper Company

Johnson, Dragoon & Northern Railway

Mascot and Western Railroad

Mexico and Colorado Railroad

New Mexico and Arizona Railroad

Picacho and Colorado River Railroad

San Pedro & Southwestern Railroad

Southern Pacific Railroad

Southwestern Railroad of Arizona

Texas and Pacific Railway

Tombstone and Southern Railroad

Tucson, Cornelia and Gila Bend Railroad

Tucson and Nogales Railroad

Twin Buttes Railroad

Union Pacific Railroad*

United States Air Force (Davis-Monthan)

Yuma Valley Railroad

Arizona Central Railroad*

Arizona & California Railroad*

Arizona and Colorado Railroad

Arizona Commercial Copper Company

Arizona Copper Company

Arizona Eastern Railroad*

Arizona and New Mexico Railway

Arizona & Swansea Railroad

Bradshaw Mountain Railroad

Clifton Northern Railroad

Copper Basin Railway*

Copper Creek Railroad

Coronado Railroad

Detroit Copper Mining Company

Gila Valley, Globe and Northern Railway

Inspiration Consolidated Copper Company

Lordsburg and Hachita Railroad

Magma Arizona Railroad

Maricopa & Phoenix Railroad

Maricopa & Phoenix & Salt River Valley Railroad

Morenci Industrial Mining Railway*

Morenci Southern Railway

Old Dominion Copper Mining & Smelting

Phelps Dodge Corporation

Phoenix and Buckeye Railway

Phoenix & Eastern Railroad

Phoenix, Tempe and Mesa Railway

Prescott & Eastern Railroad

Ray and Gila Valley Railroad

San Francisco River Railroad

San Manuel Arizona Railroad

Shannon-Arizona Railway

Tucson, Phoenix & Tidewater Railroad

United Verde & Pacific Railway

Verde Canyon Railroad*

Verde Tunnel & Smelter Railroad