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0 <br />• <br />Project . x; etience <br />Tunnels <br />URS will have technical responsibility for identifying and evaluating tunneling opportunities <br />as part of the overall conveyance alternatives studies. URS is also recognized as a world <br />leader in geotechnical engineering and design and has broad in -house experience in dam <br />and tunnel design and construction and in recent years has designed some of the largest <br />dam and tunnel construction projects in the United States including the Award - Winning <br />800,000 ac -ft Diamond Valley Reservoir Project in Southern California and the I -70 <br />Glenwood Canyon Tunnels project in Glenwood Springs, Colorado. Additional <br />information regarding URS' tunnel and dam design and construction experience is <br />presented below. <br />URS maintains a Tunnel Technology Group comprising more than 100 full -time personnel <br />dedicated to the planning, design and construction of tunnels and underground structures. <br />In the past 10 years, URS' Tunnel Technology Group has successfully completed <br />engineering and design services on over 100 projects involving over 200 miles of tunnels. <br />Table 5 provides a partial list of URS' recent tunnel design and construction projects. <br />These projects were constructed in a wide range of geotechnical conditions including <br />conditions identical and /or similar to those anticipated for the Colorado River Return <br />Project. <br />For the past three years, URS has consistently ranked in the top five firms providing tunnel <br />design services in the US. For example, Trenchless Technology Magazine recently ranked <br />URS as the No.l trenchless technology firm with annual revenues of more than $20 <br />million ITT, December 2001). <br />TABLE 5 - PARTIAL LIST OF TUNNEL PROJECTS (LAST 10 YEARS) <br />Project Name <br />Tunnel <br />Length <br />Diameter <br />01) <br />Baumgartner Tunnel <br />4.5 <br />10 <br />California Meadows Sewer Relocation <br />0.3 <br />4 <br />Cowmire /Coldwater Creek Stormwater Tunnels <br />0.9 <br />6 -9 <br />Cuyahoga Valley Interceptor Rehabilitation <br />7 <br />Dougherty Valley Tunnel and Trunk Sewer <br />1 <br />5 <br />ECIS <br />5 <br />14 <br />Fort Kam. WWTP Outfall Extension Pearl Harbor <br />Entrance <br />2.3 <br />4 <br />1 -880 Coleman Interchange <br />0.1 <br />35 <br />Imola Ave. Forcemain <br />0.5 <br />2 <br />Kaineke St., Hamakua Dr., & Keolu Dr. <br />Reconstructed Sewer <br />1.5 <br />2.5 <br />Kalaheo Avenue Reconstructed Sewer <br />1.7 <br />4 <br />Lindbergh Tunnel <br />0.3 <br />40 <br />MAC Stormwater Tunnels <br />0.2 <br />10 <br />Mill Creek Interceptor <br />3 <br />4 -10 <br />Mill -Bull Tunnel <br />2 <br />9 <br />Milpitas Parallel Force Main <br />0.2 <br />2 <br />NW CSO Forcemain <br />1 <br />3 <br />P491 Ford Island to Pearl Harbor Shipyard Force <br />Main <br />1.2 <br />1.7 <br />P701 Pearl Harbot to Fort Kam WWTP Force Main <br />1.7 <br />2.7 <br />37 <br />