Colvin Run Mill Park
Colvin Run Mill in Great Falls, Virginia, is the sole surviving operational 19th-century water-powered mill in the Washington, D.C. metropolitan area. Its restored mechanism is a nationally significant example of automated technologies pioneered in milling and later adopted across American industry. It was built in 1811. Down the gravel path of the park is the miller's house, home to the families who ran the mill. In the mid-1930s the mill was abandoned, and highway development caused it to be cut off from any near-by water source. The mill was later acquired by the Fairfax County Park Authority, repaired, and made open to the public.