USA

Lake Mead: Mechanized Tunnelling under high Pressure

Las Vegas the famous Nevada resort city with its casinos and entertainment-business, draws 90 percent of its water from Lake Mead. This largest reservoir in the United States is fed by the Colorado River. The areas around Las Vegas, however, are taking more from the lake than flows into it as snow melt and rain water from the Rocky Mountains. During the 14 years of drought, the water level has dropped by 35 m. The two existing water intakes for the Las Vegas Valley are in danger of running dry, and Intake No.1 could be at risk as early as this summer. It is now only 24 feet (7 m) below the...

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Issue 02/2015

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On the occasion of the World Tunnel Congress Herrenknecht presents itself as the pioneer in mechanized tunnelling. Using Herrenknecht Tunnelling Systems, modern tunnels worldwide are created safe and...

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Issue 04/2011 Switzerland

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Issue 03/2011

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Project Background Eastern areas of India’s Andhra Pradesh state receive only 20 cm of rainfall per year - an amount comparable to Africa’s Kalahari Desert. The Andhra Pradesh Irrigation Department...

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Issue 05/2011

Palomino Project: First Double Shield TBM in the Dominican Republic

1 Island Pioneers The “Anacaona” Double Shield TBM (4.5 m diameter) (Fig. 1) started its work where Columbus’ first great voyage of discovery ended in 1492. On the Caribbean island of Hispaniola,...

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