Zambia and Zimbabwe are retendering a $5-billion project to build a hydropower plant they previously awarded to General Electric Co. and Power Construction Corp. of China, and expect to select new bidders by September next year, an official said. The Zambezi River Authority — a joint venture between the countries that maintains the Kariba Dam complex — expects to receive bids from potential developers by April 2025 and select bidders five months after that, ZRA Chief Executive Officer Munyaradzi Munodawafa said by email.