Arkansas, Louisiana and Mississippi Railroad

The Arkansas, Louisiana and Gulf Railway (AL&G) was incorporated in July 1906 to connect Monroe with Pine Bluff, Arkansas. The latter city was never reached, and the line as opened in October 1908 ended at Hamburg and Crossett. It entered receivership in May 1913, and in December 1914 the newly organized Arkansas, Louisiana and Gulf Railroad leased both the Arkansas, Louisiana and Gulf Railway and the Crossett-Monticello Ashley, Drew and Northern Railway (AD&N), the latter owned by the Crossett Lumber Company. Alfred Cowles of Chicago bought the AL&G's property at foreclosure in September 1915, and in November the reorganized Arkansas and Louisiana Midland Railway (A&LM) acquired the Monroe-Crossett line, but the branch to Hamburg remained with Cowles. The A&LM took over the AL&G Railroad's lease of the AD&N, and leased the Hamburg line. Steam operations on the line ended by 1960.

The A&LM was not successful, and entered receivership in February 1920, terminating the AD&N lease in March. Operations north of Bastrop were suspended in May, and the property was sold in July and conveyed in August to the new Arkansas and Louisiana Missouri Railway. The Interstate Commerce Commission approved permanent abandonment of the Hamburg branch, now a county road, and resumption of operation to Crossett. The new AL&M also obtained trackage rights over the Missouri Pacific Railroad from Bastrop to Dollar Junction and Huttig, Arkansas, the two ends of the 1.88-mile (3.03 km) Louisiana and Pine Bluff Railway. The AL&M leased the latter company, which provided access to a saw mill, until its dissolution in 1979.

The current name was adopted in September 1991, when Georgia-Pacific organized the Arkansas, Louisiana and Mississippi Railroad to purchase the A&LM. The AD&N, then owned by Georgia-Pacific as successor to the Crossett Lumber Company, was abandoned in August 1995, and Genesee & Wyoming Inc. purchased several of Georgia-Pacific's railroads, including the AL&M, in January 2004. In 2006, the AL&M leased from the Union Pacific Railroad 4.24 miles (6.82 km) of line at Bastrop, which had previously been owned by the Missouri Pacific Railroad.