The Roseires Dam (Arabic:خزان الروصيرص) is a dam on the Blue Nile at Ad Damazin, just upstream of the town of Er Roseires, in Sudan. It consists of a concrete buttress dam 1km wide with a maximum height of 68m, and an earth dam on either side. The earth dam on the eastern bank is 4km long, and that on the western bank is 8.5km long. The reservoir is about 290km.