Modder River

Modder River
Modder River pontoon bridge, 1899
Location of the Modder River mouth
Etymology	Modder meaning 'mud' in Afrikaans
Location
Country	South Africa
Region	Free State, Northern Cape
Physical characteristics
Mouth	Riet River
• coordinates	29°2′25″S 24°37′42″E / 29.04028°S 24.62833°E / -29.04028; 24.62833
• elevation	1,114 m (3,655 ft)

The Modder River is a river in South Africa. It is a tributary of the Riet River¹ that forms part of the border between the Northern Cape and the Free State provinces. The river's banks were the scenes of heavy fighting in the beginning of the Second Boer War at the Battle of Modder River.

There is an inhabited farming place named "Modder River" just north of the confluence between this river and the Riet.²³

The Modder River is used extensively for irrigation, including the Krugersdrift Dam near Bloemfontein.