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Tunnels: Extensive work and surveys to identify <br />best practices of large tunnel projects with similar <br />design, construction and project management <br />confirmed that the proposed California WaterFix <br />tunnel boring machines are well within the <br />existing industry knowledge and experience. <br />Leakage: The lining system will be designed <br />to withstand the maximum internal pressure <br />calculated for the conveyance system, resulting <br />in negligible leakage. <br />Ground Vibration: Tunnels will be constructed <br />at. Least 100 feet below ground. Material over the <br />tunnels will dampen and absorb any energy <br />generated during tunneling activities. <br />.Surface Settlement: The project will use <br />geotechnical information, monitoring and <br />structure projection methods to mitigate the <br />risk of settlement effects and structural damage. <br />Seismic Mitigation: Because the proposed <br />tunnel alignment does not cross any major fault <br />rupture or creep zones, the deep tunnels will <br />not be subject to liquefaction potential. The. <br />tunnel design uses precast segmental lining <br />systems which have been successfully used in <br />seismically active areas around the world. <br />Geotechnical Considerations and <br />Mitigations: At proposed tunnel depths, dense <br />.layers of silts, sands and clays are anticipated. <br />This material will be suitable for the planned <br />tunneling activities. <br />Flood Protection: Facilities will be engineered <br />and designed to withstand water level rise resulting <br />from both a200 -year storm event and from sea <br />Level rise of 18 inches in the Delta. <br />The Department of Water Resources is working with the State Water <br />Contractors to resolve the final details of how the construction of <br />California WaterFix will be managed to guarantee the project's safety <br />and construction integrity and to ensure the project is delivered on <br />time, on budget and in accordance with approved specifications, <br />white managing risk prudently. <br />Cost estimates were determined through a rigorous analysis by <br />industry professionals and will be updated as additional information <br />becomes available. <br />Program management, construction management $ 1.91 B <br />and engineering - <br />Tunnels/shafts construction <br />Remaining construction <br />Contingency (-36% for tunnel/shafts and $ 3.38 B <br />remaining construction) <br />Land acquisition (includes 20% contingency) $ 0.15 B <br />r so <br />Program Estimate in 2014 Dollars <br />*Significant additional fishery habitat restoration will occur through California <br />EcoRestore http://resources.ca.govlecorestorel <br />wwww CALIFORNIA. 55A-9 A e <br />�t/ / ♦ \ A 1 AT E P'1 F I V z i+ THE METROPOLITAN WATER DISTRICT <br />r`a+21 MMF19 GFC W /\ EXHIBIT 2 � ' �.,',. OF SOUTHERN CALIFORNIA <br />REIJA6LE. CLF.FlDI. WATER. GAII �� <br />R <br />