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Private company

Alamo Gulf Coast Railroad

Short-line railroad in Texas

The Alamo Gulf Coast Railroad (reporting mark AGCR) 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 6.75 miles (10.86 km) of trackage within the Martin Marietta Beckmann Quarry in San Antonio, Texas.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

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The Alamo Gulf Coast Railroad (reporting mark AGCR) 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 1996.2

Sources

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