City of Rockville Water Intake Pumping Station

From www.rockvillemd.gov:

The City's drinking water supply system includes an intake pump on the Potomac River, a water treatment plant near the river, 5.7 miles of transmission lines, three storage tanks, and approximately 144 miles of local water lines to serve individual homes, business, and industries located in Rockville. The original water treatment plant was built in 1958.