• May 18, 2022

Upper Mattagami Watershed Statistics May 18, 2022 Update

Upper Mattagami Watershed Statistics May 18, 2022 Update

Upper Mattagami Watershed Statistics May 18, 2022 Update 150 150 MRCA

Watershed Update – May 18, 2022

  • The snow course sampling sites were absent of snow and the consensus among the surveying organizations is that no further snow course sampling is expected.
  • Current forecasts over the coming week show daytime temperatures ranging from +11°C to +23°C with 20mm of precipitation expected over the next 5 to 7 days.
  • Generally, inflows across the Upper Mattagami River are declining. Upstream reservoirs continue to build, with all reservoirs now having reached the summer minimum elevation.

Further updates will be issued as required.

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View OPG River System Data / Water Levels and Flow

If you have any questions or comments, please contact the Conservation Authority at 705-360-2660 or via email at [email protected]

Download the current Watershed Statistics – May 18, 2022. See our Upper Mattagami River Watershed Statistics page for the full list of reports for 2022.

The information contained in this update has been gathered by Ontario Power Generation, the Ministry of Natural Resources & Forestry and the Mattagami Region Conservation Authority. The summary highlights dam operations and storages as well as snow depth and water content in comparison to historical norms.  Watershed surveys will be conducted on the 1st and 15th of each month until the snow cover has disappeared. Updates will be issued until such time any flood threat has passed.