Officials behind the massive Three Gorges Dam are preparing to plug any holes in the project even as waters in its reservoir peak in two years.

Since the 2,309-m-long dam was erected in 2003, the water level in the reservoir has risen in stages, reaching 156 m last year.

While the level is scheduled to reach a maximum height of 175 m above sea level in 2009, there have been fears that rising waters from the world's largest hydropower project will further strain shores and trigger landslides.