The Forçados flows west and the Nun continues south. The Brass leaves the east side of the Nun about half way to the coast at Yenagoa. Country Nigeria Basin features Main source 4°56′40″N 6°15′02″E﻿ / ﻿4.944439°N 6.250647°E﻿ / 4.944439; 6.250647 River mouth 4°19′03″N 6°13′27″E﻿ / ﻿4.317373°N 6.224294°E﻿ / 4.317373; 6.224294Coordinates: 4°19′03″N 6°13′27″E﻿ / ﻿4.317373°N 6.224294°E﻿ / 4.317373; 6.224294 Physical characteristics Length 161 km (100 mi)