Historical Marker
Single Bit Bollard
Historical marker location:
1200 New Jersey Avenue Southeast, Navy Yard, District of Columbia
( Marker can be reached from M Street Southeast west of 4th Street Southeast, on the right when traveling east.)
The city was built on a swamp: The area that is now Washington, D.C. was originally a swampy, marshy region along the Potomac River. The construction of the city involved extensive drainage and landfill projects to make the land suitable for building.