Gunnison Tunnel
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Gunnison Tunnel
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| Location | Montrose County, Colorado, USA |
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| Nearest city | Montrose, Colorado |
| Coordinates | 38°29′36″N 107°43′17″W / 38.49333°N 107.72139°WCoordinates: 38°29′36″N 107°43′17″W / 38.49333°N 107.72139°W |
| NRHP Reference # | 79000616 |
| Added to NRHP | 1979-07-22 |
The Gunnison Tunnel is a 5.8 mile (9.3 km) irrigation tunnel constructed between 1905 and 1909 by the Bureau of Reclamation. At the time of its completion, it was the longest irrigation tunnel in the world. The tunnel diverts water from the Gunnison River in the Black Canyon of the Gunnison to the arid Uncompahgre Valley around Montrose, Colorado.
The idea for a tunnel is credited to Frank Lauzon, a miner and prospector. By the early 1890s he was farming in Montrose. Popular lore is that idea came to him in a dream that the waters of the Gunnison River should be brought to the valley.
As construction was undertaken, two advances in technology made work safer and easier. Jackhammers fed by a compressor replaced hand-turned drill bits to set holes for blasting charges. Dynamite replaced black powder for blasting. By 1906 shifts of workers up to 30 at a time worked in the tunnel.
The tunnel opened in 1909 to much fanfare with a dedication ceremony attended by President William Howard Taft.
In 1972, the tunnel was designated a National Civil Engineering Landmark by the American Society of Civil Engineers (ASCE).
Bureau of Reclamation - Uncompahgre Project
"The Uncompahgre Valley and The Gunnison Tunnel," by Barton W. Marsh (1905).
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