Dike Kokaral is a dike across a narrow stretch of the Aral Sea, splitting off the North Aral Sea (also called "The Small Sea") from the much larger South Aral Sea ("The Large Sea"). Work was completed in August 2005.
The dike was built twice in the past from local sand, but due to a lack of funding necessary to strengthen it once the water level in the North Aral Sea (and therefore pressure to the dike) began to rise, the dike was washed away. This happened in 1992 and 1998. However, for the short time that the dike stood, positive changes were already noticed - the climate became milder, and fauna was partly restored. When the dike was washed away, the water-level fell again, as much of the water poured into the South Aral Sea. In some places the coastline of North Aral retreated by as much as a few hundred meters.