In parallel with rehabilitation of other parts of the Mwadingusha complex such as roads, access bridges, and civil works by Stucky, SNEL, and Ivanhoe, in December 2017, ANDRITZ was awarded a further contract for hydro-mechanical works. This contract covers the supply of three new butterfly valves, a manifold of the penstock, trash racks, motorization of the spillway, as well as replacement of the intake valves, safety valves, and stop logs.
By the end of 2018, another contract was received for the rehabilitation and replacement of the safety valve chambers located in the upper dam. The scope of this work includes the upgrade of the existing overhead crane, the supply and installation of the upper and downstream penstock and gates at the upper dam, as well as rehabilitation of the building.
ANDRITZ was also awarded a contract to replace the three horizontal penstocks and gates located between the upper dam and the powerhouse with a very challenging schedule. The scope of works includes a new camp for a staff of 30, site logistics facilities such as a 150-tonne crane, scaffolding, chariots for working inside the penstocks, and anti-corrosion protection.