Little Falls Pumping Station

From www.dcwasa.com:

Raw water supply, piping, and treatment facilities of the Washington Aqueduct's water system include the Great Falls Intake on the Potomac River; two raw water conduits from Great Falls to the Dalecarlia Reservoir; the Little Falls Intake and Pump Station on the Potomac River; the Dalecarlia and McMillan Reservoirs and Water Treatment Plants; the Georgetown conduit and raw water reservoir; the Washington City Tunnel; and the East Shaft Pump Station.