Chad Basin depth of . Due to heavy pumping, since the start of the 1980s the water levels in both aquifers has been lowered, and some wells no longer function. There is a third, much lower, aquifer in Bima Sandstones that lies at a depth of . Both the current and historical areas of the basin and the mega-basin contain concentrations of fossils. Fossil-fuels deposits in the area are estimated to exceed a trillion barrels in reserves. The Lake Chad Basin Commission was set up in 1964 by Cameroon, Chad, Niger and Nigeria, the four countries that contain parts of Lake Chad.
A3 highway (Nigeria) Gamboru-Ngala Local Government conveying commodities from the two countries are now left stranded on either sides of the bridge. On May 13, 2014, the House of Representatives "called on the Federal Government to rebuild the Gamboru Bridge linking the border town with other parts of Borno State." A3 highway (Nigeria) The A3 highway is a highway in Nigeria. It runs generally north from Port Harcourt through Aba, Umuahia, Okigwe, Enugu, Ngwo, Makurdi, Lafia, Jos, Bauchi and Potiskum thence east via Damaturu, Maiduguri to the border with Cameroon at Gambaru. The continuation through Cameroon connects to N'Djamena, the capital of Chad.