The concepts … QUAKE/W Example File: Lower San Fernando Dam.doc (pdf) (gsz) Page 1 of 18 The Lower San Fernando Dam 1 Background There was a significant earthquake in Southern California in 1971, which is referred to as the San Fernando earthquake. Note the presence of two intake towers. Lower San Fernando Dam – Liquefaction-induced Failure of the Upstream Slope. The Los Angeles Dam, designed to withstand severe shaking anticipated by USGS scientists, remained intact during the Northridge earthquake. The Lower San Fernando Dam (LSFD) was built by the Los Angeles Bureau of Water Works and Supply (predecessor of Los Angeles Department of Water and Power (LADWP)) as part of the terminal storage system for the Los Angeles Aqueduct that included the adjacent Upper San Fernando Dam and several other dams in southern California. The San Fernando earthquake of February 9, 1971 in southern California initiated a major slide on the downstream slope of Upper San Fernando Dam. While the embankment failed due to liquefaction, there was no uncontrolled release of the reservoir. It was constructed 1912-1917, followed by several raises to max height of 140 ft by 1930. Figure 1 View of the Lower San Fernando Dam prior to the earthquake. This case history was a milestone to renew all seismic design and evaluation process. Nearby Lower San Fernando Dam was damaged even more severely, and would have probably led to an uncontrolled release if the reservoir elevation had not been restricted prior to the earthquake. Lower San Fernando Dam (California, 1971) The Lower San Fernando Dam (LSFD) was built by the Los Angeles Bureau of Water Works and Supply (predecessor of Los Angeles Department of Water and Power (LADWP)) as part of the terminal storage system for the Los Angeles Aqueduct that included the adjacent Upper San Fernando Dam and several other dams in southern California. QUAKE/W Example File: Lower San Fernando Dam.docx (pdf) (gsz) Page 1 of 17 The Lower San Fernando Dam 1 Background There was a significant earthquake in Southern California in 1971, which is referred to as the San Fernando earthquake. In contrast, the Lower San Fernando Dam, which was built to lower shaking standards and with 1912-1915 construction methods, suffered major damage during both the 1971 and 1994 earthquakes. Lower San Fernando Dam is a hydraulic fill earth dam in San Fernando, California. San Fernando is situated 2½ miles east of Lower San Fernando 6-015 Dam. OBSERVATIONS ON THE SAN FERNANDO DAMS . The earthquake occurred on February 9, 1971 at 6:00 a.m. local time and had a 6.6 Richter magnitude. We need you to answer this question! Liquefaction-Induced Failure of the Upstream Slope. Because of the magnitude of the slide and strong interest of the engi-neering profession in the evaluation of the seismic stability of earth dams, the Lower San Fernando Dam slide has received The liquefaction slide nearly caused a major uncontrolled release of the reservoir. Michael H. Beaty Peter M. Byrne University of British Columbia University of British Columbia Vancouver, BC-Canada-V6T 124 Vancouver, BC-Canada-V6T 124 ABSTRACT A review of the Upper and Lower San Fernando dams during the 1971 San Fernando earthquake is presented in light of current understanding of post-liquefaction behaviour. The upstream slope of the Lower San Fernando Dam, in California, failed due to liquefaction during the 1971 San Fernando earthquake. Who owns the Lower San Fernando Dam? The performance of the Lower San Fernando Dam during the 1971 earthquake is a good illustration of this. The upstream slope of the Lower San Fernando Dam, in California, failed due to liquefaction during the 1971 San Fernando earthquake. 1971 San Fernando earthquake. The earthquake occurred on February 9, 1971 at 6:00 a.m. local time and had a 6.6 Richter magnitude. Description & Background. San Fernando is a city in the San Fernando Valley, in the northwestern region of Los Angeles County, California in the Los Angeles metropolitan area.
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