is a one-lane bridge, a home built around 1830 by John Spillman Armstrong, and the Waterloo Post Office (now a private residence) built on the Culpeper side in 1870 by Armstrong under contract to the U.S. Post Office. Local residents believe the post office was built by the U.S. government as a way of re-establishing its authority following the Civil War. References External links Populated places in Fauquier County, Virginia