Kainji Dam is a dam across the Niger River in Niger State of western Nigeria. Construction of the dam was carried out by Impregilo (a consortium of Italian Civil Engineering Contractors) to designs by Joint Consultants, Balfour Beatty and Nedeco, and began in 1964 to be completed in 1968. The total cost was estimated at US$209 million, with one-quarter of this amount used to resettle people displaced by the construction of the dam and its reservoir, Kainji Lake.