6b. Presentation
Service Tunnel Renewal/ Replacement Seismic Upgrades CIP 102112 1 Item No. 6b_attach Date of Meeting March 28, 2017 Service Tunnel Renewal/ Replacement Tunnel Views 2 Service Tunnel Renewal/ Replacement Project Location 3 Service Tunnel Renewal/ Replacement Project Phasing 4 Service Tunnel Renewal/ Replacement • Original work scope included the tunnel but not the Central Loading D ock area (zone 5 on map) • Seismic modeling exposed issues in the previously area • Adding this area will bring the entire tunnel up to current seismic code Scope of Work 5 Service Tunnel Renewal/ Replacement • Costs have risen: – Original authorization $27.9M – Central Loading Dock $ 3.2M – Cost escalation and $ 2.4M impact mitigation • Revised Total Cost $33.5M 6 Service Tunnel Renewal/ Replacement Loading Dock Area 7
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