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The Fortnight

Damned dams

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May 15, 1995 | From the print edition

-- -- A RLCENT World Bank report says that 25
dams in India out of the 947 surveyed in
Orissa, Madhya Pradesh, Rajasthan and
Tamil Nadu were found unsafe. They
were constructed using data vastly
underestimating peak flood flows. Postreview estimates of peak flood
values are much higher than the
earlier data. The report is a
sequel to a World Bank-sponsored project to improve the
safety of dams in India.

The Hirakud dam in Orissa
has been designed to withstand only 42,474 cusecs of
floodwater against a new estimate of 78,220 cusecs. The
Gandhi Sagar dam in Madhya Pradesh is similarly faulty.

Monsoon floods last year gouged a
24.38 rn deep hole in the concrete and
rock foundation of the of the half constructed
controversial Sardar
Narmada river, and wash,
cubic metre of cement. The World Bank
has suggested upgrading flood handling systems and expanding the spill-ways of the dam.

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