The North Aral Sea (Kazakh: Солтүстік Арал теңізі, Russian: Северное Аральское море) is the portion of the former Aral Sea that is fed by the Syr Darya River. It split from the South Aral Sea in 1986 as water levels dropped due to river diversion for agriculture. The poorly built Dike Kokaral intended to contain the North Aral Sea and save its fisheries failed twice, but in 2005 the government of Kazakhstan was able to fund a more robust design. Since then, water levels have risen faster than expected and fish stocks have increased.