Filling of tailrace tunnel 2 has begun at the Karuma hydropower project in Uganda, marking a major milestone as part of preparations for wet testing.

Filling of tailrace tunnel 1 has been done, UGECL has said, and a video of the filling can be found on the electricity generator's twitter site.

The 600MW Karuma project is located on the Nile River in Kiryandongo District in mid-northern Uganda. It includes a 314m long diversion weir fitted with radial gates, six shafts and associated power tunnels leading to an underground power house containing six 100MW Francis turbines and the two 8.6km long tailrace tunnels. 

When fully operational, it will be the largest power station in the country.