Business: Dam at Mangla

ENGINEERING

Once a military stronghold for maharajahs, the fortress of Mangla in West Pakistan has in recent years commanded nothing more than a sweeping view of a river valley to the southwest and snow-tipped mountains to the north. Last week Pakistan President Ayub Khan came to Mangla to dedicate its new clay and sandstone dam—part of a $2 billion complex that when completed will be the world's largest irrigation network, bringing water to 30 million acres of land and serving the 50 million people who live in the vast Indus River basin.

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