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<br />'. <br /> <br />Seismic Vulnerability Study <br /> <br />Client: City of San Diego Water Department, 600 B Street, San Diego, CA 92101. Client <br />Contact: Mr. Mike Conner, 858-522-6856. Project Description: Seismic vulnerability <br />assessment of water distribution system, including over 3,000 miles of pipelines, 50 <br />reservoirs and tanks, 3 treatment plants, 40 pumping plants. Developed seismic criteria <br />for post-earthquake operations for fire, life safety, residential, commercial and industrial <br />customer service. Included detailed evaluations of reservoir outlet towers, tanks, <br />reservoirs, pump stations, pipelines. Considered liquefaction, landslide, surface faulting <br />and ground shaking hazards. Developed $46 million seismic improvement program as <br />part of an overall $780,000,000 system upgrade capital improvement program. <br /> <br />Seismic Evaluation Program - EBMUD <br /> <br />Client: EBMUD, 375 Eleventh Street, Oakland, CA 94607. Client Contact: Mr. David <br />Pratt Young, 510-287-1665. Project Description: Seismic vulnerability assessment of <br />water distribution system, including 4,000 miles of pipelines, 175 tanks, 6 treatment <br />plants, 135 pumping plants. Developed seismic criteria for post-earthquake operations for <br />fire, life safety, residential, commercial and industrial customer service. Included <br />walkdown inspection of over 120 facilities; damage assessment of pipelines under several <br />scenario earthquakes; validation of water system performance during 1989 Lorna Prieta <br />earthquake. <br /> <br />Seismic Assessment of Underwater Pipeline Crossings <br /> <br />Client: EBMUD, 375 Eleventh Street, Oakland, CA 94607. Client Contact: Mr. Joe <br />Young, 510-287-0147. Project Description: Seismic assessment of5 underwater and 1 <br />on-bridge pipeline river crossings. The effort included detailed nonlinear computer <br />analyses of older pipeline materials under the combined effects of seismic wave passage <br />and lateral spreading of underlying soils. The pipelines included 1948-vintage cast iron <br />pipe with articulated ball joints; bored 1985 welded steel pipe; and cut and fill 1970- <br />vintage welded steel pipe. The piled valve box and interior slip jointed pipeline fittings <br />were evaluated. Based on the analyses, it was found that 2 of 6 pipelines were likely to <br />fail under large earthquake movements of up to 5 feet. The mitigation schemes relied <br />upon redundancies in the existing system, as well as addition of valves to preclude severe <br />depressurization of the resulting water transmission system. <br /> <br />Seismic Evaluation Program - Detailed Evaluations <br /> <br />Client: EBMUD, 375 Eleventh Street, Oakland, CA 94607. Client Contact: Mr. David <br />Pratt, 510-287-1665. Project Description: Seismic vulnerability assessment and retrofit <br />of water distribution system. Refined assessments for items found to be most vulnerable <br />from initial reviews. Retrofits include upgrade of older 1920-vintage buildings for life <br />safety and continued post-earthquake function; design of new pipelines; retrofit of <br />concrete and steel tanks and open cut reservoirs; anchorage of electrical, mechanical, <br /> <br />October 9,2009 <br /> <br />Page 15 <br />