Upper Vaal WMA, or Upper Vaal Water Management Area (coded: 8), is a Water Management Area that includes the following major rivers: the Wilge River, Liebenbergsvlei River, Mooi River and Vaal River, and covers the following Dams:
Boundaries
Tertiary drainage regions C11 to C13, C21 to C23, and C81 to C83.
References
Upper Vaal Water Management Area Wikipedia(Text) CC BY-SA