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United States, Utah - us/20

Spanish Fork Water Conveyance

Two 2.9 m-diameter rock drives totalling 4,267 m with an intermediate siphon pipeline in opencut and a downstream 3,230 m opencut 2.44 m-diameter pipeline to connect with existing Syar tunnel. Under design by URS Greiner Woodward Clyde for Central Utah Water Conservancy District, UT for bid late-1999. April 1999.   Accepted design/build alternative to previously reported Spanish Fork tunnels comprises a 6.7 km-long aqueduct awarded at value $53 million to Obayashi/Clyde jv who are planning to use a refurbished 3.8 m-diameter Herrenknecht TBM starting mid-September, 2000. Primary support will be rockbolts and steel arches followed by cast-in-place 3 m i.d. concrete final lining. Designers are Jacobs Associates with Camp Dresser McKee and Golder Associates. This is the final extension of the system from Strawberry Reservoir which includes the 10-year old Syar tunnel, a long-time resident in the tunnelbuilder Hall of Fame (click on Recordbreakers, above). Visit www.jacobssf.com and www.herrenknecht.com June 2000.  Refurbished Herrenknecht 3.9 m hardrock TBM with 78 m-long trailing backup underway at Provo, UT on 7.3 km drive for Obayashi/Clyde with Jacobs Associates on design/construct project. TBM excavation scheduled for completion August, 2001 on 24 h/day, 6 day/week. Package includes two 220 m-deep vertical shafts. Visit www.jacobs.com and www.herrenknecht.com 08/01.



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