The Allen Water Station (H&TC Railway Water Station) in Allen, Collin County, Texas, is a district containing structures and ruins of structures built by the Houston & Texas Central (H&TC) Railway Company beginning in 1874. Typical of 19th century water stations maintained by railroad companies, the Allen Water Station featured a dependable water source, a pump facility, a network of water pipes, and a rail side water tank. The district today contains the archaeological and architectural remains of all its former facilities and is currently open to the public as a local heritage park that highlights the important role that the H&TC railroad played in late 19th century commerce, transportation and settlement in North Texas. The most visible component today is its 1874 stone dam extended across Cottonwood Creek, which created the water supply critical for operating the station. Other recognizable components in the immediate vicinity are the stone masonry architectural footings of a rail-side water tank and the brick and concrete ruins of a second-generation pumping facility. The site retains a good degree of integrity, despite the loss of some of its wooden structures, because enough archeological components remain to provide information about the site's original layout and use. - NRHP, 25 February 2008