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The Crosbyton-Southplains Railroad Company was chartered on April 6.1910 and then built 38 miles of track from Lubbock to Crosbyton. In 1915 the Atchison, Topeka and Santa Fe Railway Company acquired the railroad and renamed it the South Plains and Santa Fe Railway Company on August 17, 1916. The South Plains and Santa Fe was then leased to the Panhandle and Santa Fe on July 1, 1917 and operated by the latter company until they merged in 1948. Just a year after the lease, on July 1, 1918, the South Plains and Santa Fe completed a 64 mile line from Lubbock to Seagraves.

The Panhandle and Santa Fe Railway Company was one of the two major operating subsidiaries of the AT&SF Railway in Texas. It owned or leased virtually all Santa Fe properties west of Sweetwater with lines covering the Panhandle and South Plains regions as well as a line across the Trans-Pecos to Presidio.

By the 1920's, railroad operated in all directions out of Lubbock except directly west. In an attempt to prevent another carrier from entering the area from that direction, the South Plains and Santa Fe Railway built westward from Doud completing a 65 mile extension through Whiteface to Bledsoe, Texas, in 1925.

The SPSF and PSF were eventually merged in into the AT&SF. The Santa Fe sold the two lines on April 2, 1990 {minus the Bledsoe to Whiteface trackage abandoned in 1948} to the Seagraves, Whiteface and Lubbock Railroad. The SW&L was purchased by shortline holding company RailAmerica on November 1, 1995. RailAmerica soon renamed the railroad the West Texas & Lubbock Railroad. On May 25, 2002, the railroad was again sold, this time to the Permian Basin Railways.

The West Texas & Lubbock Railway operates 107 miles of railroad on two lines extending from Lubbock, TX to Seagraves and Whiteface. The railroad serves the agricultural area west and southwest of Lubbock and the oil fields of west Texas. The primary commodities hauled are fertilzer, construction aggregates, grain, cotton, chemicals, peanuts, plastic and ethanol. In 2007 the WT&L bought the BNSF line between Plainview and Dimmet, which the Chicago, Burlington and Quincy Railroad subsidiart Fort Worth and Denver South Plains Railway had completed in 1928.

The Permian Basin Railway is a wholly-owned subsidiary of Iowa Pacific Holding. PBR was formed in May, 2002 to purchase the Texas-New Mexico Railroad and the West Texas & Lubbock Railway {WTLC}, collectively the Permian Basin Railways. Subsequent railroad acquisitions by IPH have been under the umbrella of PBR. In addition to the TNMR and WTLC, PBR owns the Arizona Eastern Railway {AZER} and the San Luis & Rio Grande {SLRG} acquired in December 2005. Additional acquisitions have included the Chicago Terminal Railroad {opened in 2006} and the Mount Hood Railroad {acquired in 2007}.

The Fort Worth and Denver South Plains Railway Company was chartered on March 6, 1925, to built from Estelline in Hall County to a point in Castro County, with a branch from Briscoe County to Lubbock County about 200 miles. The line came out of an attempt by the Fort Worth and Denver City to build branches into the lower Panhandle to handle the shipping of cotton. On November 20, 1928, the FW&DSP opened its 206 miles of track from Estelline through Sterley and Plainview to Dimmit and from Lubbock through Sterley to Silverton. The line was leased to the Fort Worth and Denver City for operations and merged into that company on June 13, 1952.

The Fort Worth and Denver City Railway Company {The Denver Road} was chartered by the Texas legislature on May 36, 1873. The company later changed its name to the Fort Worth and Denver Railway Company on August 7,1951. The main line of the railroad ran from Fort Worth through Wichita Falls, Childress, Amarillo and Dalhart, to Texline, where it connected with the rails of parent company Colorado and Southern Railroad, which was a subsidiary of the CB&Q. In the Burlington Northern Denver Region Employees Timetable #3 dated April 29, 1984, this line was known as the 6th Subdivision and was listed as a branchline. It was assigned to the Fort Worth Division. The line was also known as the South Plains Subdivision.

The primary purpose of the initial construction of the Texas-Mexican Railway {often known as the "Toot and Never Move" was to serve the oil fields in west Texas and southeastern New Mexico. Today, the Texas-New Mexico Railroad operates 104 miles of railroad extending from a Union Pacific connection at Monahans, Texas to Lovington {New Mexico}. The railroad serves the oil fields of west Texas and southeast New Mexico. The primary commodities hauled are oilfield chemicals and minerals, construction aggregates, industrial waste and scrap.

The Texas-New Mexico Railroad Company was originally chartered on November 19,1927, to build from a point on the Texas and Pacific Railway near Monahans in Ward Company to Kermit, near the Texas-New Mexico state line, a distance of about 35 miles. On October 31,1928, the Interstate Commerce Commission approved an application by the Texas and Pacific Railway Company to acquire control of the Texas-New Mexico Railroad by purchasing all of its capital stock. 34 miles of track from Monahans through Kermit to the state line, along with a 3 mile branch to Winks, were completed in June 1929. In December of that year the Texas-New Mexico Railroad was authorized to build from the state line to Lovington, New Mexico, which was reached on July 20, 1930, totaling 112 miles of track.

In June 1954, the railroad described their passenger service from Monahans to Lovington as "Mixed Train daily, except on Sunday, on irregular schedule subject to freight connections". Southbound was except Mondays. Earlier years at least had a published schedule, mixed train #51 northbound and mixed train #50 southbound.

On November 1, 1978, the Texas-New Mexico Railroad was merged into the Missouri Pacific Railroad as successor to the Texas and Pacific, and eventually into the Union Pacific Railroad with the 1982 UP-MP merger. The line was subsequently sold to the RailTex, Incorporated, of San Antonio, which began operating between Monahans and Lovington as the Texas and New Mexico Railroad on September 18, 1989. In 1999 RailTex merged with another shortline holding company, Rail America sold the TMNR to Permian Basin Railways on May 25, 2002.