It is intended to collect drainage water from the irrigated lands of the Lebap, Mary and Akhal Provinces, and partly from Dashoguz and Balkan Provinces, and direct it to the Karashor depression in northern Turkmenistan where Lake Altyn Asyr was created. The northern system is to collect drainage water from Dashoguz and, partly, the Khorezm oasis of Uzbekistan, while the southern system is to collect drainage from Akhal, Mary and Lebap Provinces. The total length of the Trans-Turkmen Collector is 720 km.