The general principle of the Master Agreement on Apportionment says that Alberta will alllow half the natural flow of each of its rivers (minus diversions to the United States) to flow into Saskatchewan.
The South Saskatchewan River however is subject to some added conditions:
- The waters of the South Saskatchewan and Red Deer rivers may be treated as one, for apportionment purposes.
- When natural flow (minus United States diversions) of the South Saskatchewan River at the boundary is greater than 3,000 cubic feet per second, the minimum actual flow will be 1,500 cubic feet per second.
- When natural flow at the boundary is less than 3,000 cubic feet per second, the minimum actual flow will be half of this.
Updated: Mar 6, 2015