Petersburg, Va., Vicinity. Canal Aqueduct (U.S. Civil War) The Canal Aqueduct, located in the vicinity of Petersburg, Virginia, played a significant role during the U.S. Civil War. Built as part of the Weldon Railroad to bypass the Appomattox River, it was strategically important for both Union and Confederate forces due to its use as a supply route. During the Siege of Petersburg in 1864-1865, numerous battles took place near the aqueduct, including the Battle of Hatcher's Run (February 1865) and the Third Battle of Petersburg (April 1865). The structure remains a historical landmark, commemorating the pivotal role it played in this critical phase of the U.S. Civil War.