Pakistan, Nov. 10 -- Water entered a tunnel and the powerhouse of Tarbela Dam 5th Extension Hydropower Project (T-5) construction site after a weak section of rock fell during excavation on Monday.

In a statement, the Water and Power Development Authority (WAPDA) confirmed that all workers were safely evacuated following the water inflow incident.

A WAPDA spokesperson said the rock fell during excavation of the second bench of the connecting tunnel at the fifth extension project. Water then flowed from the intake pit into the tunnel and the power house. All workers were immediately evacuated.

The spokesperson said water had been completely drained from the intake pit and that dewatering of the under-construction power house had also be...