Colorado Railroads

• C&NRy: Colorado and Northwestern Railway
• C&S&CCD: Colorado and Southern and Cripple Creek District
• C&SERY: Colorado and South Eastern Railway
• C&SRy: Colorado and Southern Railway
• C&WRY: Colorado and Wyoming Railway
• CC&CS: Cripple Creek and Colorado Springs
• CCRR: Colorado Central Railroad
• CMRR: Colorado Midland Railroad
• CMRy: Colorado Midland Railway
• CRRR: Crystal River Railroad
• C&S&CCD: Colorado and Southern and Cripple Creek District
• CS&CCD: Colorado Springs and Cripple Creek District
• D&NORR: Denver and New Orleans Railroad
• D&RGRR: Denver and Rio Grande Railroad
• D&RGRW: Denver and Rio Grande Railway
• D&RGRy: Denver and Rio Grande Railway
• D&RGRy CO: Denver and Rio Grande Railway Company
• D&RGRwy CO: Denver and Rio Grande Railway Company
• D&SLRR: Denver and Salt Lake Railroad
• DB&WRR: Denver, Boulder and Western 
• DL&GRR: Denver Leadville and Gunnison
• DL&NW: Denver Laramie and Northwestern
• DNW&PRR: Denver Northwestern and Pacific Railroad
• DSP&P: Denver South Park and Pacific
• DSP&PRR: Denver South Park and Pacific Railroad
• DSP&PRY: Denver South Park and Pacific Railway
• DT&FWRR: Denver Texas and Fort Worth Railroad
• DT&GRR: Denver Texas and Gulf Railroad
• DU&PRR: Denver Utah and Pacific
• F&CCRR: Florence and Cripple Creek Railroad
• FL&CC RR Co: Florence and Cripple Creek Railroad Company
• Gilpin Tram
• GT Co: Gilpin Tram Company
• LHP&P: Laramie Hans Peak and Pacific
• LSP&L: London South Park and Leadville
• RGECo: Rio Grande Extension Company
• RGSRR: Rio Grande Southern Railroad
• RGWRR: Rio Grande Western Railroad
• RGWRy: Rio Grande Western Railway
• RGWRy Co: Rio Grande Western Railway Company
• Uintah
• Uintah Railway
• UPD&G: Union Pacific Denver and Gulf
• UPD&GRR: Union Pacific Denver and Gulf Railroad
• UPD&GRy: Union Pacific Denver and Gulf Railway
• UPRW-SP: Union Pacific Railway – South Park Division

Nevada Railroads:

• C&CRR: Carson and Colorado Railroad
• E&PRR: Eureka and Palisades Railroad
• LV&T: Las Vegas and Tonopah
• NC&ORR: Nevada California and Oregon Railroad
• NCBRR: Nevada Copper Belt Railroad
• NCRR: Nevada Central Railroad
• NNRY: Nevada Northern Railway
• OSL: Oregon Short Line
• OSLRR: Oregon Short Line Railroad
• SLR: Salt Lake Route
• Southern Pacific
• SPCo: Southern Pacific Company
• SPLA&SLRR: San Pedro Los Angeles and Salt Lake
• T&GRR: Tonopah and Goldfield Railroad
• T&TRR: Tonopah and Tidewater Railroad
• V&TRR: Virginia and Truckee Railroad

Utah Railroads:

• American Fork Railroad
• B&GRR: Bingham and Garfield Railroad
• D&RGWRR: Denver and Rio Grande Western Railroad
• D&RGWRW: Denver and Rio Grande Western Railway
• D&RGWRy: Denver and Rio Grande Western Railway
• E&PCRy: Echo and Park City Railway
• OSL&UN: Oregon Short Line and Utah Northern
• OSL: Oregon Short Line
• OSLRR: Oregon Short Line Railroad
• RGWRR: Rio Grande Western Railroad
• RGWRy: Rio Grande Western Railway
• RGWRy Co: Rio Grande Western Railway Company
• SCRR: Summit County Railroad
• SLR: Salt Lake Route
• SPVRYCO: San Pete Valley Railway Company
• Summit County Railroad
• SURR: Southern Utah Railroad
• U&NRR: Utah and Northern Railroad
• U&PVRy: Utah and Pleasant Valley Railway
• UCRWY: Utah Central Railway
• UCRy: Utah Central Railway
• UERR: Utah Eastern Railroad
• UPRW-U: Union Pacific-Utah
• USRR: Utah Southern Railroad

Western Railroads: 

• A&PRR: Atlantic and Pacific Railroad
• AT&SF: Atchison, Topeka and Sata Fe
• AT&SFRR: Atchison, Topeka and Santa Fe Railroad
• AT&SFRy: Atchison, Topeka and Santa Fe Railway
• Cotton Belt
• CPRR: Central Pacific Railroad
• CPRR of CAL: Central Pacific Railroad of California
• CPRR Co: Central Pacific Railroad Company
• GNRy: Great Northern Railway
• GNRy-L: Great Northern Railway Lines
• KPRR: Kansas Pacific Railroad
• KPRW: Kansas Pacific Railway
• LTR&T: Lake Tahoe Railway and Transportation
• NPRR: Northern Pacific Railroad
• O&CRR: Oregon and California Railroad
• OR&NCo: Oregon Rail and Navigation Company
• Santa Fe
• Santa Fe Route
• SFP&P: Santa Fe, Prescott and Phoneix
• Southern Pacific
• SPCo: Southern Pacific Company
• SPRR: Southern Pacific Railroad
• StL&SWRY: St. Louis and Southwestern Railway
• StL&SWRR: St. Louis and Southwestern Railroad
• Union Pacific
• UPRR: Union Pacific Railroad
• UPRW: Union Pacific Railway
• UPRW-KD: Union Pacific Railway – Kansas Division
• UPRW-U: Union Pacific Railway – Union Division
• UPRy: Union Pacific Railway
• YVRR: Yosemite Valley Railroad