Water Tunnels

Longest tunnel in the world, carrying New York City water from Rondout and Delaware reservoirs by gravity. A chronic leak under th...

Second longest continuous rock tunnel in the world, running 30 to 100 m under the Finnish shield from Lake Paijanne to Helsinki. S...

Diverts Orange River water through 82.8 km of tunnel under the Suurberg plateau to feed the Fish River valley, converting Eastern ...

Carries raw water from Lake Bolmen in Smaland to Skane in the far south, serving about 700,000 people. Cross section is only 8 squ...

Libyan project moving fossil water from Nubian sandstone aquifers beneath the Sahara to the coastal cities and farms. Mostly burie...

A deep wastewater and storm tunnel carrying sewage and runoff from the Valley of Mexico to a treatment plant in Hidalgo. Built in ...

The super sewer under the River Thames from Acton to Abbey Mills, built to stop the tens of millions of tonnes of sewage that over...