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Gunnison Tunnel
Society: ASCEMain Category: CivilSub Category: TunnelsEra: 1900-1909DateCreated: 1909MontroseState: COCountry: USAWebsite: 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 1/1/1923Image Caption: Gunnison TunnelEra_date_from: 1909
First Concrete Pavement
Society: ASCEMain Category: CivilSub Category: Roads & RailsEra: 1890-1899DateCreated: 1893101-163 E Court AvenueBellefontaineState: OHZip: 43311Country: USAWebsite: http://www.asce.org/Project/First-Concrete-Pavement/Creator: Bartholomew, George , Wonders, James

"This is the first Portland cement concrete street built in the United States ... Here started the better roads movement which has given our citizens from coast to coast swift and sure transportation."  
- Historic marker, Bellefontaine, Ohio, celebrating the 50th anniversary of America's first concrete pavement, 1941 

YearAdded:
1976
Image Credit: Public Domain (Author's Choice)Image Caption: First Concrete PavementEra_date_from: 1893
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