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Gunnison Tunnel
Society: ASCE Main Category: Civil Sub Category: Tunnels Era: 1900-1909 DateCreated: 1909 Montrose State: CO Zip: Country: USA Website: http://www.asce.org/Project/Gunnison-Tunnel/ Creator: Bureau of Reclamation

At its completion, the 5.8-mile Gunnison Tunnel under western Colorado's Vernal Mesa was the longest irrigation tunnel in America. It carried water from the Gunnison River to the Uncompahgre Valley to irrigate 146,000 acres of cropland. 

Work on the 30,582-foot tunnel was first performed manually. Adverse geological conditions provided great challenge for this pioneering project. The drilling crews had to deal with clay, sand, shale, and a badly fractured fault zone. 

YearAdded:
1972
Image Credit: Public Domain; Produced prior to 1/1/1923 Image Caption: Gunnison Tunnel Era_date_from: 1909
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