Er Roseires is a town in eastern Sudan

Sudan

Sudan , officially the Republic of the Sudan , is a country in North Africa, sometimes considered part of the Middle East politically. It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the...

 60km from the border with Ethiopia

Ethiopia

Ethiopia , officially known as the Federal Democratic Republic of Ethiopia, is a country located in the Horn of Africa. It is the second-most populous nation in Africa, with over 82 million inhabitants, and the tenth-largest by area, occupying 1,100,000 km2...

.

Lord Prudhoe mentions this town in the 1829 diary he kept while travelling in the Sennar. At the time it was the residence of one Sheikh Suliman, ruler of the lower reach of the Blue Nile

Blue Nile

The Blue Nile is a river originating at Lake Tana in Ethiopia. With the White Nile, the river is one of the two major tributaries of the Nile...

 (known as Bahr-el-azrek), for which he paid 1500 ounces of gold to the Egyptians out of his revenues.

The Roseires Dam

Roseires Dam

The Roseires Dam 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 1 km wide with a maximum height of 68m, and an earth dam on either side. The earth dam on the eastern bank is 4 km long, and that on the...

is located just upstream of the town.