The Al-Wehda Dam (سد الوحدة, Sadd Al-Weḥda, Unity Dam), formerly known as Maqarin Dam, is a 110 m (360 ft) roller-compacted concrete gravity dam on the Yarmouk River on the border between Syria and Jordan. It can hold up to 115,000,000 m3 (93,000 acre⋅ft) of water and is designed to provide Jordan with water for both human consumption and agriculture. Water from the reservoir is diverted through a diversion weir at Addassiyah downstream of the Al-Wehda dam to the King Abdullah Canal where it is mixed with other freshwater sources. Some of the water from the canal is then pumped to Amman to be used as drinking water, after being treated in the Zai water treatment plant. The discharge of effluents from adjacent agricultural lands has caused algae growth and eutrophication especially in sprin