Battle, Middle, and Lodge Creek

These creeks originate in the Cypress Hills of southeastern Alberta, flow in a southeasterly direction into Saskatchewan and across the international boundary into Montana, emptying into the Milk River.

The streams are tributaries of the Milk, governed by both the Boundary Waters Treaty (1909) that requires Canada to pass half the flow to Montana, and by Schedule A of the 1969 Master Agreement on Apportionment between Alberta and Saskatchewan. Recognizing Canada's obligations to the U.S. on these streams, the 1969 master agreement says that three-quarters of the annual flow will pass the interprovincial boundary from Alberta to Saskatchewan.

The balancing period for the creeks is the calendar year. Calculations on apportionment are carried out quarterly (more frequently if required) by the Prairie Provinces Water Board. Surplus deliveries by the upstream jurisdiction cannot be banked or used to offset shortfalls in subsequent years.

For the natural flow, the flow actually received by Saskatchewan and for Saskatchewan's entitlement from 1985 to 2004, see:

 

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Updated: Mar 6, 2015