Ogun-Oshun River Basin Development Authority (OORBDA) is one of the twelve River Basin Development Authorities established by the Federal Government of Nigeria under decrees number 25 of 1976 and 31 of 1977. Since 1976, there have been amendments to the original operational functions of the Authorities. As at today, the OORBDA is operating under decree No.35 of 1987 and Privatization and Commercialization Decree No. 25 of 1988. It is a parastatal of the Federal Ministry of Water Resources. From the foregoing, it would be seen that O-ORBDA is expected to concentrate on the development and management of the water resources’ potential of Osun, Oyo, Ogun and Lagos State, that is, all the areas drained by Ogun, Oshun and Sasa Rivers, including their tributaries.