Swabi: All workers have been safely evacuated from the Tarbela 5th Extension Hydropower Project following a water inflow incident during excavation work, the Water and Power Development Authority (WAPDA) announced.

According to a WAPDA press release, the incident occurred when a weak rock mass collapsed during excavation of the second bench connecting tunnel, allowing water to enter the tunnel and the powerhouse area. The authority confirmed that the water from the intake pit has been completely drained, and dewatering of the under-construction powerhouse is underway.

WAPDA addressed and corrected reports concerning the collapse of the T-5 main tunnel, clarifying that no damage occurred to the main tunnel, the under-construction powerhouse, the tailrace culvert, or the switchyard. Importantly, the authority confirmed that there were no injuries or fatalities resulting from the incident.

Senior WAPDA officials, including the project engineer and the contractor, are currently assessing the situation to tackle any potential challenges that may arise as the project progresses.