Drainage Regions - Variant of SDAC 2003
- 4 - Hudson Bay
- 415 - Churchill
- 06AA - Headwaters Beaver, Alberta and Saskatchewan
- 06AB - Sand
- 06AC - Upper Beaver, Alberta and Saskatchewan
- 06AD - Central Beaver, Alberta and Saskatchewan
- 06AE - Cowan
- 06AF - Waterhen, Saskatchewan
- 06AG - Lower Beaver, Alberta and Saskatchewan
- 06BA - Churchill Lake
- 06BB - Upper Churchill, Manitoba - Lac Île-à-la-Crosse
- 06BC - Mudjatik
- 06BD - Haultain
- 06CA - Montreal, Saskatchewan
- 06CB - Rapid
- 06CC - Smoothstone
- 06CD - Central Churchill, Manitoba - Pinehouse Lake
- 06CE - Foster
- 06DA - Cochrane
- 06DB - Upper Reindeer - Reindeer Lake
- 06DC - Wathaman
- 06DD - Lower Reindeer - Mouth
- 06EA - Central Churchill, Manitoba - Highrock Lake
- 06EB - Central Churchill, Manitoba - Hughes
- 06EC - Southern Indian Lake
- 06FA - Northern Indian Lake
- 06FB - Lower Churchill, Manitoba - Little Beaver
- 06FC - Little Churchill
- 06FD - Lower Churchill, Manitoba - Mouth
- 06FE - Hudson Bay - Owl
- 4 - Hudson Bay
- 415 - Churchill
- 06AA - Headwaters Beaver, Alberta and Saskatchewan
- 06AB - Sand
- 06AC - Upper Beaver, Alberta and Saskatchewan
- 06AD - Central Beaver, Alberta and Saskatchewan
- 06AE - Cowan
- 06AF - Waterhen, Saskatchewan
- 06AG - Lower Beaver, Alberta and Saskatchewan
- 06BA - Churchill Lake
- 06BB - Upper Churchill, Manitoba - Lac Île-à-la-Crosse
- 06BC - Mudjatik
- 06BD - Haultain
- 06CA - Montreal, Saskatchewan
- 06CB - Rapid
- 06CC - Smoothstone
- 06CD - Central Churchill, Manitoba - Pinehouse Lake
- 06CE - Foster
- 06DA - Cochrane
- 06DB - Upper Reindeer - Reindeer Lake
- 06DC - Wathaman
- 06DD - Lower Reindeer - Mouth
- 06EA - Central Churchill, Manitoba - Highrock Lake
- 06EB - Central Churchill, Manitoba - Hughes
- 06EC - Southern Indian Lake
- 06FA - Northern Indian Lake
- 06FB - Lower Churchill, Manitoba - Little Beaver
- 06FC - Little Churchill
- 06FD - Lower Churchill, Manitoba - Mouth
- 06FE - Hudson Bay - Owl
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