Engineering & Operations Committee Item 6b November 4, 2019 - PowerPoint PPT Presentation

Dec 23, 2022 •383 likes •533 views

Engineering & Operations Committee Item 6b November 4, 2019 Seismic Resilience Strategy Planning Operations Engineering Reporting Goal: Maintain Goal: Provide Goal: Provide Goal: Mitigate effective emer- system flexibility,

Engineering & Operations Committee Item 6b November 4, 2019
Seismic Resilience Strategy Planning Operations Engineering Reporting Goal: Maintain Goal: Provide Goal: Provide Goal: Mitigate effective emer- system flexibility, accountability & seismic risks of gency planning diversified supply transparency infrastructure & & response portfolio, & water system emergency storage capabilities as a whole Seismic Resilience Water Supply Task Force Goal: Enhance the seismic resilience of imported water supplies through multi-agency collaboration
CASTAIC LAKE SILVERWOOD LAKE Casa Loma Siphon LIVE OAK Barrel No. 1 RESERVOIR GARVEY RESERVOIR LAKE PERRIS LAKE MATHEWS DIAMOND VALLEY LAKE LAKE SKINNER E&O Committee Item 6b Slide 3 November 4, 2019
Bernasconi Tunnel Project San Jacinto Area Diversion Structure Casa Loma Fault San Diego Canal E&O Committee Item 6b Slide 4 November 4, 2019
148-in concrete pipe constructed in 1935 Ground subsidence due to groundwater withdrawal Multiple repairs to address leaks 300 ft of concrete pipe replaced with steel pipe & external sleeve type couplings in 1968 Internal seals installed in 1996 & 2017 E&O Committee Item 6b Slide 5 November 4, 2019
xperience Earthquake Resistant Ductile Iron Pipe (ERDIP) Developed by Kubota Corp. Absorbs large displacements & allows pipeline to remain intact Over 40 years of experience in Japan E&O Committee Item 6b Slide 6 November 4, 2019
May 2018 authorization for design to replace Casa Loma Siphon Barrel No. 1 Kubota Sole Source Supplier Widely used in Japan since 1970’s Used in US & Canada since 2013 Valley Water, SFPUC, EBMUD, LADWP & MWD Japan Valley Water District E&O Committee Item 6b Slide 7 November 4, 2019
 Geotechnical Investigation  Fault Hazard Evaluation  Design Criteria Development  Structural Modeling  Verification Performance Testing Final Design Material Procurement Recommendation Welded Steel Pipe (Competitively Bid) ERDIP (Negotiated sole-source contract) Construction E&O Committee Item 6b Slide 8 November 4, 2019
Geotechnical Investigation Fault Hazard Evaluation Potential fault displacement of 13 ft. horizontal, 3 ft. vert. Potential subsidence of 5 ft. E&O Committee Item 6b Slide 9 November 4, 2019
Fault Interaction Model ERDIP Joint Model Before After Primary fault E&O Committee Item 6b Slide 10 November 4, 2019
Un-rotated position Final deflection angle of 4.26 degrees E&O Committee Item 6b Slide 11 November 4, 2019
Fault line Existing 148-in dia ERDIP Steel 148”/104” Steel Pipe 104” ERDIP 104”/148” Steel Pipe E&O Committee Item 6b Slide 12 November 4, 2019
December 2019: Award Procurement Contracts ERDIP: sole source agreement with Kubota Welded steel pipe competitively bid June 2020: Board Award Installation Final tie-in during February 2021 shutdown E&O Committee Item 6b Slide 13 November 4, 2019

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