This article relies largely or entirely on a single source .(January 2022) |
![]() Inspection party: August 26, 1915 | |
Overview | |
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Coordinates | 37°46′24″N122°30′32″W / 37.773356°N 122.508984°W (south portal) |
Status | Active |
Operation | |
Opened | 1915 |
Character | sewer tunnel (currently used for storm drain overflow) |
Technical | |
Length | 4,233 feet (1,290 m) long |
Mile Rock Tunnel is a utility tunnel in San Francisco, in the U.S. state of California that was originally constructed as the storm sewer outfall draining the Sunset, West Mission, Richmond, and Ingleside districts.
The Mile Rock Tunnel started construction in 1914 and was completed by 1915. [1] The contract was initially awarded to Edward Malley, but he stopped work after five months because of the high cost of insurance; R.C. Storrie and Company, who were responsible for other large tunneling projects including the Twin Peaks Tunnel, assumed responsibility for the work in January 1915. [1]
Mayor 'Sunny Jim' Rolph and other officials, including City Engineer M.M. O'Shaughnessy performed an inspection of the completed tunnel using a car on August 26, 1915. The tunnel was fitted with temporary structures and lighting to allow the car to enter without the threat of flooding from the outlet, but as it was not wide enough to allow the car to turn around, the return trip was conducted in reverse gear. [1]
The tunnel was constructed by a combination of cut-and-cover (through soil) and boring (through rock) methods. [1]
The Presidio of San Francisco is a park and former U.S. Army post on the northern tip of the San Francisco Peninsula in San Francisco, California, and is part of the Golden Gate National Recreation Area.
Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7, 1905, and has a city council. Located in the San Francisco Bay Area's East Bay region, Richmond borders San Pablo, Albany, El Cerrito and Pinole in addition to the unincorporated communities of North Richmond, Hasford Heights, Kensington, El Sobrante, Bayview-Montalvin Manor, Tara Hills, and East Richmond Heights, and for a short distance San Francisco on Red Rock Island in the San Francisco Bay. Richmond is one of two cities, the other being San Rafael, that sits on the shores of both San Francisco Bay and San Pablo Bay.
The Pacific Electric Railway Company, nicknamed the Red Cars, was a privately owned mass transit system in Southern California consisting of electrically powered streetcars, interurban cars, and buses and was the largest electric railway system in the world in the 1920s. Organized around the city centers of Los Angeles and San Bernardino, it connected cities in Los Angeles County, Orange County, San Bernardino County and Riverside County.
The Los Angeles Aqueduct system, comprising the Los Angeles Aqueduct and the Second Los Angeles Aqueduct, is a water conveyance system, built and operated by the Los Angeles Department of Water and Power. The Owens Valley aqueduct was designed and built by the city's water department, at the time named The Bureau of Los Angeles Aqueduct, under the supervision of the department's Chief Engineer William Mulholland. The system delivers water from the Owens River in the Eastern Sierra Nevada Mountains to Los Angeles, California.
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Michael Maurice O'Shaughnessy was an Irish civil engineer who became city engineer for the city of San Francisco during the early twentieth century and developed both the San Francisco Municipal Railway (Muni) and the Hetch Hetchy water system.
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