Standard Drainage Area Classification (SDAC) 2003
- 05 - Nelson River
- 05A - Upper South Saskatchewan
- 05AA - Upper Oldman
- 05AB - Central Oldman - Willow
- 05AC - Little Bow
- 05AD - Central Oldman - Belly
- 05AE - St. Mary
- 05AF - Pakowki Lake - Non-contributing
- 05AG - Lower Oldman
- 05AH - Seven Persons
- 05AJ - Upper South Saskatchewan - Upper
- 05AK - Upper South Saskatchewan - Lower
- 05 - Nelson River
- 05A - Upper South Saskatchewan
- 05AA - Upper Oldman
- 05AB - Central Oldman - Willow
- 05AC - Little Bow
- 05AD - Central Oldman - Belly
- 05AE - St. Mary
- 05AF - Pakowki Lake - Non-contributing
- 05AG - Lower Oldman
- 05AH - Seven Persons
- 05AJ - Upper South Saskatchewan - Upper
- 05AK - Upper South Saskatchewan - Lower
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