Initially planned for 2020, the new distribution station for the DRC's Inga I and Inga II hydropower plants will now not be ready until June 2021.
Numerous member states of the African Union have shown interest in taking part in the Grand Inga hydropower project while Congolese president Félix Tshisekedi an arrangement with Australian mining giant Fortescue Metals Group.
The project to build a power line between Uganda and the DRC, put on ice in 2014, has now resurfaced as it could work to both countries' interests.
The Congolese authorities, who are concerned that South Africa might renege on its commitment to take a share of the future giant dam's electricity output, are looking for potential "offtakers" in France to enable it to proceed with the project.
Despite all the delays under his predecessors in launching construction works on the Inga III dam, Félix Tshisekedi is eager to embark on a much more ambitious project in Kongo Central province: the Grand Inga.
The company owned by billionaire businessman Adebayo Ogunlesi is in talks with the Congolese authorities concerning a potentially huge investment in the mega-project to construct dams on the River Congo.
Australian mining giant BHP Billiton, which pulled out of the Inga III dam project in 2012, might be making a comeback.
Reassured by the Chinese state-owned company, the DRC government could soon draft the concession contract for the construction of the vast 11,050-MW dam.
With African Union support, the DRC will in late April play host to dozens of VIPs to discuss the development of the Congo River scheme that comprises several vast dams.
Congolese authorities are discussing the possibility of a new consortium made up of of Egypt's Income and the China State Construction Engineering Corporation (CSCEC) taking over the Inga III project.
Rather than the 11,000 MW selected by former president Joseph Kabila, his successor has decided the mega dam will deliver less than 50 percent of that.