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Show Lining completed on Utah's longest tunnel The 7.4-mile Vat Tunnel, longest ever constructed in Utah, received its final lining of concrete Friday, Feb. 11. Clifford I. Barrett, ' Director of the Bureau of Reclamation's Upper Colorado Col-orado Region, said the concrete lining of the last portion of the tunnel marks the longest completed on the Strawberry Collection System, of the Central Utah Project. The 8.5-mile Stillwater Tunnel is still under construction. The $50 million Vat Tunnel is approximately 50 miles northwest of Duchesne,. .Utah. Reclamation ' "holed through" the mountain on July 16, 1981. Excavation had been hampered by underground water under pressures of up to 250 pounds per square inch. The water entered the 10-foot, 7-inch-diameter tunnel tun-nel through sandstone and lime forma tions. Near the end of the excavai loose surface material was : encountered. "All that remains on the tunnel isgr. concrete placement on the outside;.' tal structure, which must wait'i warmer temperatures in the spnr; Barrett said. "The concrete lining tunnel signals the completion of airf-major airf-major feature on the Strawberry Coition Coi-tion System," he added. ' Vat Tunnel will carry water from West Fork of the Duchesne River lo Currant Creek Reservoir. ; Strawberry system will intercept; regulate the flows for nine streams;: convey the water by gravity ata: ' miles to be stored in the enlar;-: Strawberry Reservoir for use on Wasatch Front. |