Water tunnels are tunnels (below-ground channels) used to transport water to areas with large populations or agriculture. They are frequently part of aqueducts. Some aqueducts, such as the Delaware Aqueduct are single long tunnels. In other cases, such as the San Jacinto Tunnel on the

Colorado River Aqueduct The Colorado River Aqueduct, or CRA, is a water conveyance in Southern California in the United States, operated by the Metropolitan Water District of Southern California. The aqueduct impounds water from the Colorado River at Lake Havasu on ...

, water tunnels form parts of far longer aqueducts. In cases where the outflow of a water tunnel is into an existing stream or river flowing to the point of water use, the term aqueduct is less likely to be used, as with the Harold D. Roberts Tunnel from

Dillon Reservoir Dillon Reservoir, sometimes referred to as Lake Dillon, is a large fresh water reservoir located in Summit County, Colorado, United States, south of I-70 and bordered by the towns of Frisco, Silverthorne, and Dillon. It is a reservoir for th ...

to the

North Fork South Platte River The North Fork South Platte River is a tributary of the South Platte River, approximately 50 miles (80 km) long, in central Colorado in the United States. The river is located near the headwaters of the South Platte in the Rocky Mountains s ...

Notable water tunnels, or systems including water tunnels

* Alva B. Adams Tunnel from the western slope of the

Colorado River The Colorado River () is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and in northern Mexico. The river, the List of longest rivers of the United States (by main stem), 5th longest in the United St ...

drainage to the eastern

Front Range The Front Range is a mountain range of the Southern Rocky Mountains of North America located in the central portion of the U.S. State of Colorado, and southeastern portion of the U.S. State of Wyoming. It is the first mountain range encounter ...

of Colorado, * Angeles Tunnel 7.2 miles (11.6 km) * Bagur Navile Tunnel 6 miles (9.7 km) * Bosporus Water Tunnel *Chicago Tunnel and Reservoir Plan 109.4 miles (176.1 km) *

Denver Water Denver Water is a water utility that operates as a Government agency, public agency serving the City and County of Denver, Colorado, and a portion of its surrounding suburbs. Established in 1918, the utility is funded by water rates and new tap ...

** Moffat Tunnel 6.2 miles (10.0 km) **Harold D. Roberts Tunnel from

23.3 miles (37.5 km) *Dingshan Tunnel on the Irtysh–Karamay–Ürümqi Canal (China) 4.6 miles 7.4 km *

Metropolitan Water District of Southern California The Metropolitan Water District of Southern California is a regional wholesaler and the largest supplier of treated water in the United States. The name is usually shortened to "Met," "Metropolitan," or "MWD." It is a cooperative of fourteen cit ...

** San Jacinto Tunnel on the

13 mi (21 km) *

New York City water supply system The New York City water supply system is a combination of Aqueduct (water supply), aqueducts, reservoirs, and tunnels which supplies fresh water to New York City. With three major water systems (New Croton Aqueduct, Croton, Catskill Aqueduct, Ca ...

** Catskill Aqueduct 28 miles (45 km) of grade tunnel, 35 miles (56 km) of pressure tunnel. ** Delaware Aqueduct 85 miles (137 km) ** New York City Water Tunnel No. 3 60 miles (97 km) * Päijänne Water Tunnel 75 miles (120 km) * San Juan–Chama Project ** Azotea Tunnel 12.8 miles (20.6 km) * The Inter-reservoirs Transfer Scheme (IRTS) in Kwai Chung and Sha Tin, New Territories, Hong Kong

Notable water tunnels, or systems including water tunnels

See also