In the 1920s, the East Bay Municipal Utility District (EBMUD) constructed an aqueduct through the Berkeley Hills to transport water from the San Pablo Reservoir to a still-active pumping facility in Kensington, located just above the Colusa Circle. Some of the water received by this facility is pumped up the hill to the Summit Reservoir located at the top of Spruce Street. The rest is pumped to other reservoirs serving the East Bay.