Chad Basin British and French concluded an agreement to clarify the boundary between French West Africa and what would become Nigeria. A boundary was agreed along a line from Say on the Niger to Barruwa on Lake Chad, but leaving the Sokoto Caliphate in the British sphere. Parfait-Louis Monteil was given charge of an expedition to discover where this line actually ran. On 9 April 1892 he reached Kukawa on the shore of the lake. Over the next twenty years a large part of the Chad Basin was incorporated by treaty or by force into French West Africa. On 2 June 1909
Niger River Fund. The World Bank approved a US$500 million soft loan in July 2007 to finance projects in the basin over a 12-year period. Funding will be awarded in two phases. The initial $185 million credit will go to Nigeria, Guinea, Benin, Mali and Niger. The second, $315 million investment, is slated for Burkina Faso, Cameroon, Chad and Ivory Coast. Besides financing the rehabilitation of dams in Nigeria, the loan will also fund the "sustainable management of selected degraded ecosystems and rehabilitation of small water infrastructure" and capacity building. In September 2009, the Nigerian government commenced a 36 billion naira dredging