• April 18, 2023

Upper Mattagami Watershed Statistics April 18, 2023 Update

Upper Mattagami Watershed Statistics April 18, 2023 Update

Upper Mattagami Watershed Statistics April 18, 2023 Update 150 150 MRCA

Watershed Update – April 18, 2023

  • Generally, snow depth and water content conditions for this time of year are below normal.  Water content variances are ~28% to ~78% below normal through the entire Upper Mattagami Watershed.
  • Current forecasts over the coming week show daytime temperatures ranging from +2°C to +11°C with minimal precipitation expected over the next 5 to 7 days.
  • Inflows across the Upper Mattagami River watershed have increased significantly due to the high temperatures and resulting snow melt.  Reservoirs upstream are all now building while local inflows through the City are high and continue to increase.
  • Town Creek, Crawford Creek and other area watercourses are flowing well.  All watercourses will continue to be closely watched by Authority and Municipal staff.

The next Update will be issued on or about May 2, 2023.

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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]

See our Upper Mattagami River Watershed Statistics page to download the current watershed statistics and for the full list of reports for 2023.

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.