The provisional bridge that provides access across the river to the construction site was also overtopped by the high tide that further damaged the embankments and flooded the water tunnels, the authority reported.
It further showed that the contractor is currently draining the two waterlogged diversion tunnels.
“The bridge embankments have been reinstated and access restored, the full extent of the damage will be known once the dewatering exercise is complete,” the statement also said.
No one was reported to have sustained any injuries when the damage occurred, as the site was evacuated on time.
The authority further noted that there was no significant flood damage at the other construction sites which include access roads, transmission line construction and civil works, adding that all the main access roads under construction are still passable.
The roads include the Polihali Western Access Road (PWAR) from Ha Seshote to Polihali and the Polihali North Eastern Access Road (PNEAR) which connects Polihali to Mapholaneng along with the Northern Access Road (NAR) between Leribe and the Katse Village.
No flooding was reported along these routes and construction activity on the roads and other construction sites continued without interruption.
The statement also showed that procurement for the construction of the water transfer main works like the Polihali Dam and Polihali Transfer Tunnel is expected to commence in the first half of 2021 while other major works tenders scheduled to go out to market in the next few weeks include those for the construction of major bridges.
The water levels of the Senqu River continue to be closely monitored as do the Katse and Mohale reservoir levels. The Katse and Mohale live reservoir levels stood at 71.86 percent and 41.01 percent, respectively, by Friday.