Tidal Reservoir, Outlet, Spanning Tidal Reservoir Outlet at Fourteenth Street Bridge, Washington, District of Columbia, DC

Significance: Built between 1888 and 1889 as part of the reclamation plan for the Potomac Flats, the Tidal Reservoir Outlet originally operated without accompanying inlet gates to control and regulate water flow from the channel through the reservoir to the river. Its stone masonry arch construction is representative of its functional design and purpose since the tidal gates were fitted into the arch spans. The Tidal Reservoir outlet was considered an engineering feat because of the dangerous nature of the river bottom at this location. Its function later changed to include foot traffic crossing over the channel to the flats.
Unprocessed Field note material exists for this structure: N759
Survey number: HAER DC-9-B
Building/structure dates: 1888-1889 Initial Construction