Tambao is a Manganese deposit and potential mine site in the Oudalan Province, located in the Sahel Region, which the far northeastern part of Burkina Faso. Tambao has been estimated, when exploited, to be one of the largest deposits in the region. Its development, a major priority of the Burkinabe state, has been an on and off project since the 1990s. Barely served by roads or other infrastructure, the Tambao reserves are some 210 kilometres (130 mi) north of Kaya and 350 kilometres (220 mi) northeast of the capital, namely Ouagadougou.