San Francisco's Twin Peaks (Images of America)
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Twin Peaks is located in the geographic center of San Francisco. These distinctive hills are not only recognizable landmarks with spectacular views, they also play a major role in the safety and security of San Franciscans. Towers on Christmas Tree Point provide communication support to the police and fire departments. Firmly constructed into the bedrock of Twin Peaks are three massive municipal reservoirs that supply gravity-pulled drinking water and water for fire fighting. Roads and a tunnel were built on, around, and through the peaks with the purpose of gaining easier access to the western parts of the city. Farms and homes appeared along Corbett Road, and new neighborhoods sprang up on the slopes of Twin Peaks: Midtown Terrace, the Crown, Graystone, Villa Terraces, and Clarendon Heights, on which stands the Sutro Tower.
(Courtesy private collection.) This is a 2012 view of the same location as the previous photograph. Summit Reservoir is seen on the upper left, and a little of Twin Peaks Reservoir is visible through the trees on the right. (Author’s collection.) 95 The Standard Building Company, owned by Carl and Fred Gellert, and the Panorama Development Company began construction of 817 single-family two- and three-bedroom homes on the west of Twin Peaks in 1954. The western slope was mapped into seven
organisms were deposited on the ocean floor. Many layers of this material were deposited on top of each other and pressed together, combined with dust from the earth’s surface blown by the tradewinds. Chert, seen in the photograph on the left, is found on the north (Eureka) peak. Pillow basalt originated in the mid-ocean ridge in the igneous deep part of the ocean that ended up on the continental crust and was covered by chert. Underwater volcanic eruptions pushed the ocean plate toward the
resulted in 490 city blocks damaged, Market Street leads from the burned area of the city up toward Twin Peaks following the 1906 earthquake and fire. The dairy farm that eventually became Rooftop Elementary School is located on the land surrounded by the grove of trees in the foreground. (Courtesy private collection.) 18 25,000 buildings destroyed, and 3,000 people killed. Four square miles, or over 80 percent, of the city was affected. Approximately 227,000 people were left homeless out of a
Francisco in 1940. The population of San Francisco was 634,536. America joined World War II following the Pearl Harbor attack on December 8, 1941. San Francisco relocated Japanese Americans to internment camps in 1942, and the United Nations Charter was signed in San Francisco in 1945. (Courtesy Geographicus.) San Francisco had a newly built Bay Bridge that opened on November 12, 1936, in time for the Golden Gate International Exposition in 1939 and 1940 on Treasure Island. The buildings from
Peaks Reservoir is still a major component of the AWSS. When the 1906 fire happened, 25,000 buildings burned and 80 percent of the entire city’s property value was devalued. This reservoir, built in the shape of an ellipse, is 275 by 281 feet and 32 feet deep. (Courtesy private collection.) The Summit Reservoir, built in 1954 to hold drinking water, sits on Clarendon Heights Hill, nestled between Twin Peaks and Mount Sutro. This reservoir holds 14 million gallons of water. In March 2004, a