1937-1946 — Denver & Salt Lake Railway

The Denver and Salt Lake Railway was incorporated in 1925 as a reorganization of the Denver and Salt Lake Railroad, which in turn was incorporated in 1912 to take over from the financially failing Denver, Northwestern and Pacific Railway (incorporated 1902). At that time the D&SL extended from Denver, through the Front Range to Craig, CO. The Denver & Rio Grande Western Railroad bought control of the D&SL and built the Dotsero Cutoff, a connection between the D&SL at Orestod and the D&RGW at Dotsero. The D&SL was officially merged into the D&RGW in 1947. The subdivisions of the D&SL, 1 and 2, became the D&RGW Pueblo subdivisions 1 and 1A.

1947-1963 — Denver Division

The Denver Division covers the "Joint Line" between Denver and Pueblo. The line is jointly owned and operated by the D&RGW and the AT&SF, as a result of USRA oversight during World War I. Denver Division eventually became known officially as the Joint Line in the published timetables.

1949-1960 — Pubelo (Moffat) Division

The Pueblo Division subdivisions 1A and 1B were originally the Denver & Salt Lake Railway subdivisions 1 and 2. The Denver & Rio Grande Western Railroad bought control of the D&SL and built the Dotsero Cutoff, a connection between the D&SL at Orestod and the D&RGW at Dotsero. The D&SL was officially merged into the D&RGW in 1947. The Pueblo division was divided into two employee timetables, this series covering the 'Moffat' route, and another series covering Pueblo west and the remaining narrow gauge lines. .

1941-1960 — Pueblo Division

Pueblo Division originally consisted of the lines from Pueblo to Salida, Pueblo to La Veta, and Pueblo southward.  In timetable #163, trackage from La Veta to Alamosa, and all the lines from Alamosa south and west were transferred from Alamosa Division.  This included the remaining narrow gauge lines from Antonito to Cumbres, Chama, and thence to Durango, Farmington and Silverton.  Pueblo Division was eventually incorporated in Colorado Division.

1961-1970 — Colorado Division

Colorado Division is a rollup of all subdivisions in the Grand Junction, Pueblo and Pueblo (Moffat) Divisions with the following exceptions:  Grand Junction to Helper (sub #5), Sunnyside branch (sub #5A),  Montrose branch (sub #16) and the North Fork branch (sub #16A) went to the new Utah Division.  Both Colorado Division and Utah Division were eventually included in a single System timetable.

1963-1989 — Joint Line Division

Joint Line Division covers the trackage between Denver and Pueblo, Colorado.  The line is jointly owned and operated by the D&RGW and the AT&SF, as a result of USRA oversight in World War I.  The Joint Line was previously known as the Denver Division.  Note that timetable #1 is titled as the Denver Division.  It is included as part of the Joint Line Division as well since it is the start of a new numbering scheme, as well as a new timetable size.

1936-1960 — Grand Junction Division

Grand Junction Division includes the trackage from Salida on west to Minturn, Grand Junction and Helper, along with the ancillary branches.  The original narrow gauge transcontinental mainline was transferred to Grand Junction Division from the Alamosa Division in Grand Junction #137, January 11, 1953.  These lines were later abandoned.  Grand Junction Division was later split, with the lines east of Grand Junction going to the Colorado Division and the lines west of Grand Junction going to the Utah Division (along with the Montrose and North Fork branches).

1961-1970 — Utah Division

Utah Division is a rollup of all subdivisions in the Salt Lake Division with the following additions from the former Grand Junction Division:  Grand Junction to Helper (sub #5), Sunnyside branch (sub #5A), Montrose branch (sub #16) and the North Fork branch (sub #16A).  Utah Railway owns and has trackage rights along some sections of this track.   Both the Colorado Division and the Utah Division were eventually included in a single System timetable.

Source: http://idrgw.com/ETT/ETTMain.htm

1950's Passenger Trains departing Denver Union Terminal

• Moffat Route Trains (Pubelo TT #5 March 26, 1950)

  • D&RGW         #23/24 Mixed Passenger & Freight

  • D&RGW         #19/20 Mountaineer

  • D&RGW         #7/8 Prospector

  • D&RGW         #9/10 Passenger Mail & Express

  • D&RGW         #17/18 California Zephyr
    

• Joint Line Trains (Joint Line TT #97 May 31, 1953)

  • AT&SF             #141/130 California & Chicago Express

  • C&S                #27/28 Gulf Coast Special

  • D&RGW/MP     #3/4 Colorado Eagle

  • AT&SF             #101/102 Centennial State

  • C&S                 #21/22 Texas Zephyr

  • D&RGW           #1/2 Royal Gorge

• Union Pacific Trains (Union Pacific TT January 1, 1951)

  • UP                    #17/18 Portland Rose (St. Louis – Seattle)

  • UP                    #37/38 Pony Express (St. Louis – Los Angeles)

  • UP                    #9/10 City of St Louis (St. Louis – San Francisco)

  • UP                    #111/112 City of Denver (Denver – Chicago)

  • UP                    #85/86 National Parks Special (Denver – Chicago)

  • UP                    #211/212 Daily (Denver – Estes Park)

• Rock Island Trains (Chicago, Rock Island & Pacific TT May 1957)

  • CRI&P              #7/8 Rocky Mountain Rocket (Denver – Chicago via Limon )