Washington City Canal
Washington, D.C., United States · built 1815
The Washington City Canal was a canal in Washington, D.C., that operated from 1815 until the mid-1850s. The canal connected the Anacostia River, termed the "Eastern Branch" at that time, to Tiber Creek, the Potomac River, and later the Chesapeake and Ohio (C&O) Canal. The canal fell into disuse during the late 19th century and the city government covered over or filled in various sections in 1871. The canal's Lockkeeper's House, built in 1837 near the present-day intersection of 17th Street and Constitution Avenue NW, was preserved and is now the oldest building on the National Mall.
Canal data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).