Monolith (formerly, Aqueduct) is an

unincorporated community An unincorporated area is a region that is not governed by a local municipal corporation. Widespread unincorporated communities and areas are a distinguishing feature of the United States and Canada. Most other countries of the world either have ...

in the Tehachapi Valley, in

Kern County Kern County is a county located in the U.S. state of California. As of the 2020 census, the population was 909,235. Its county seat is Bakersfield. Kern County comprises the Bakersfield, California, Metropolitan statistical area. The county sp ...

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

. The community is located east of Tehachapi, at an elevation of in the southern

Sierra Nevada The Sierra Nevada () is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primar ...

and eastern

Tehachapi Pass Tehachapi Pass (Kawaiisu: ''Tihachipia'', meaning "hard climb") is a mountain pass crossing the Tehachapi Mountains in Kern County, California. Traditionally, the pass marks the northeast end of the Tehachapis and the south end of the Sierra Nev ...

areas.

History

The Aqueduct post office opened in 1908, and changed its name to Monolith in 1910. Aqueduct−Monolith began as a camp for workers at a cement plant for the Owens Valley aqueduct project, supplying materials for the construction of

concrete Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most wid ...

structures.

William Mulholland William Mulholland (September 11, 1855 – July 22, 1935) was an Irish American self-taught civil engineer who was responsible for building the infrastructure to provide a water supply that allowed Los Angeles to grow into the largest city in ...

bestowed the name change, due to a huge

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms w ...

deposit. At Monolith Substation in 2014,

Southern California Edison Southern California Edison (or SCE Corp), the largest subsidiary of Edison International, is the primary electricity supply company for much of Southern California. It provides 15 million people with electricity across a service territory of ap ...

commissioned the

Tehachapi Energy Storage Project The Tehachapi Energy Storage Project (TSP) is a 8 MW/32 MWh lithium-ion battery-based grid energy storage system at the Monolith Substation of Southern California Edison (SCE) in Tehachapi, California, sufficient to power between 1,600 and 2,400 ...

, which was the largest

lithium-ion battery A lithium-ion or Li-ion battery is a type of rechargeable battery which uses the reversible reduction of lithium ions to store energy. It is the predominant battery type used in portable consumer electronics and electric vehicles. It also s ...

system operating in

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and th ...

at the time of commissioning and one of the largest in the world.

References

Unincorporated communities in Kern County, California Populated places in the Sierra Nevada (United States) Tehachapi, California Unincorporated communities in California {{KernCountyCA-geo-stub