• April 16, 2021

Upper Mattagami Watershed Statistics April 15, 2021 Update

Upper Mattagami Watershed Statistics April 15, 2021 Update

Upper Mattagami Watershed Statistics April 15, 2021 Update 150 150 MRCA


  • 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 7 days show daytime temperatures ranging from +4°C to +10°C, with minimal precipitation forecasted.
  • OPG’s reservoirs on the Upper Mattagami River (Mesomikenda, Peterlong, and Mattagami Lakes) continue to fill, with consideration being given to the maintenance of minimum flows downstream for fish spawn. An earlier than normal refill was initiated at all upstream reservoirs to account for lower than normal snow amounts and inflows. Refill is also ongoing at Wawaitin GS (Kenogamissi). Forecasts and conditions will continue to be monitored and adjustments will be made accordingly. OPG’s water level and flow graphs are updated daily and can be found at www.opg.com/river.
  • Town Creek, Crawford Creek and other area watercourses are flowing well. All watercourses will continue to be closely watched by Authority and Municipal staff. Stream flows and water levels continue to be monitored on a daily basis.

Further updates will be issued as required.

Did you know that you can sign up through the MRCA website to have flood alerts sent to your email address?

If you have any questions or comments, please contact the Conservation Authority at 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 2021.

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.