US-based mineral exploration and development company High Power Exploration (HPX), which is backed by Ivanhoe Mines co-chairperson Robert Friedland, has signed a letter of intent (LoI) with the Liberian government and pan-African diversified investment and operations group Guma Africa Group to enter into negotiations to own, design, finance, develop and operate the Liberty Corridor – a new multi-user infrastructure corridor connecting Guinea and Liberia. The $3-billion to $5-billion project will connect Nimba, Guinea’s richest mining region, with a new railroad to a new deepwater port in Liberia, an extension of the existing hydropower network from Côte d’Ivoire into the Nimba districts of Liberia and Guinea.