The Alamo Gulf Coast Railroad is a short-line railroad headquartered in San Antonio, Texas. It is a subsidiary of Martin Marietta Materials, a spinoff of Lockheed Martin., and began operation in 1996.
The AGCR operates on about of trackage within the Martin Marietta Beckmann Quarry in San Antonio, Texas. The AGCR moves limestone and aggregates within the Backmann Quarry to form trains for the Union Pacific Railroad to haul out. Industrial operations are not normally considered railroads, but the AGCR is because, before the closure of the northern end of the quarry and the construction of The RIM shopping center, it served two lumberyards near Camp Bullis Rd. After that, the line past 1604 became known as the Camp Stanley Industrial Lead because the line went just far enough out to serve the warehouses at Camp Stanley.
Four locomotives are operated by the AGCR: #1 EMD SD40 (former MP 777), #2 EMD SD40-2, #3 SD40-2 converted into a yard slug (former CNW 6819), #4 EMD SW1500