High Grand Falls Dam will hold 5.6 billion cubic metres of water.
The facility will be the first of its kind in the sub Saharan Africa.
Talks are underway for China to fund a new highway and rail extension.
The new flyover, funded by Spain, is expected to open in 2027.
A total of 56 dams will be implemented under the PPP model.
The 50km bridge will connect Dar es Salaam with Zanzibar Island.
The dam will provide 80% of Kwale’s daily water requirement.
The four-lane dual carriageway is now 99% complete.
The project is co-funded by the Japan Int. Cooperation Agency.
The 457-metre bridge replaced a causeway built by colonialists in 1929.