Rising waters increase uncertainties

The main stream of the region's Bhagirathi river reversed the direction of its flow after officials shut the gates of two water tunnels on Wednesday.

Authorities say the tunnels have been closed to build crucial sections of the main dam.

But the alteration has created an artificial reservoir nearly four kilometres long and 25 metres deep.

Tehri's main town is located uncomfortably close to the swelling waters, which have already submerged parts of the town.

Bahuguna evicted

The office-cum-home of one of India's leading environmentalists, Sunder Lal Bahuguna, situated on the banks of the Bhagirathi, has gone under water.

Large dams have been condemned by high-profile protesters like award-winning author Arundhati Roy.

But the authorities seem determined to go ahead with this project.

Local people say the only bridge linking the old town with the new, and the rest of the country, is equally threatened by the rising waters.

Nearly 10,000 residents of the old town face a very real possibility of losing their homes.

High profile protests annoy Delhi

They say dam authorities have stopped the river's natural flow to intimidate them into leaving without staking a claim to a rehabilitation package.

There was some relief when authorities opened an upstream diversion channel but locals say a second diversion tunnel should be opened to release the reservoir's water.

Authorities firm

The district magistrate, Radha Ratudi, told the BBC that her administration was working to ensure normal food supplies and transport services.

She said rehabilitation efforts had been stepped up and strongly denied reports of any strong public protest.

The 200-year old town of Tehri is expected to be totally submerged by next November.

Leading Indian scientists and environmentalists have been protesting against the dam on several grounds.

One of the reasons is seismic danger.

The dam is being built on the edge of the central Himalayan seismic gap, around 45kms from the epicentre of a 1991 earthquake.

But the authorities say they have taken adequate precautions to protect the dam.