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From CEWF:
Reservoir areas received 50mm or more of rain on Wednesday and Thursday. This meant that already high levels and flows increased somewhat but TSW staff were operating dams and were able to avoid extreme levels. They continue to work to rebalance levels and flows towards seasonal normals throughout the system. This process will take several days and there is more rainfall on the forecast for next week.
From TSW:
Trent-Severn Waterway - Water Level Management Update – July 11, 2024
Parks Canada's water management team continues to actively monitor water levels, flows, and weather forecasts across the Trent-Severn Waterway. These factors are used to determine dam operations on a daily basis for the Trent-Severn Waterway.
Parks Canada maintains the Ontario Waterways Water Management InfoNet on the Trent-Severn Waterway website at: https://parks.canada.ca/lhn-nhs/on/trentsevern/info/infonet/point-gestion-eau-water-management-updates
The InfoNet contains background information on water management practices, water management updates, frequently asked questions about water management, various reports on water management, and the most recent water levels of lakes along both the Rideau Canal and the Trent-Severn Waterway. The information comes from hydrometric gauges located at key points along both waterways and is vetted by trained and experienced Parks Canada water management staff.
This information is intended as supplemental information only. Please refer to your respective Conservation Authority or the Ontario Ministry of Natural Resources and Forestry as the primary source for relevant flood forecasting information specific to your area. These are: Kawartha Conservation, Otonabee Region Conservation Authority, Ganaraska Conservation Authority, Lower Trent Conservation Authority, Lake Simcoe Region Conservation Authority or, in all other areas of the Trent and Severn Watersheds, the Ontario Ministry of Natural Resources and Forestry. Information can also be found on the Ontario Flood Forecasting and Warning Program.
Outlook
During the last 3 weeks, the Trent-Severn watersheds have received 50-100% above the normal amount of rain. Water levels were generally higher than normal in advance of the forecasted system as not all watersheds have recovered completely from the last significant rain event. As a result of the widespread system named Tropical Depression Beryl, the watersheds received anywhere between 35-75 mm of rain. The impacts from the above-average amounts of precipitation received remain across the system. Flows and levels are above normal for this time of the year across all locations.
The Trent-Severn Water Management Team will be active, and the changing conditions will be closely monitored. Any watershed condition updates will be released by your Conservation Authority or local Ontario Ministry of Natural Resources district.
Haliburton and Northern Areas
Water levels and flows remain high in northern areas. Most lake levels on the Gull River, Burnt River system, and Central Lakes are near full and are increasing. Lake levels are monitored on a 24-hour basis, and water management operations are being conducted based on the current watershed conditions, lake levels, estimated runoff amounts and forecasted rainfall. The flows on the Burnt River are above average and increasing and are expected to be sustained by the enhanced runoff from precipitation and operations in reservoirs. The flows on the Gull River are significantly above average for this time of year.
Kawartha Lakes and the Otonabee River
Water levels in the Kawartha Lakes are above full conditions across the system due to sustained and elevated inflows from the Haliburton areas and the rainfall received. Flows on the Otonabee River are above average for this time of year. The lake levels and flows are expected to continue rising into the weekend.
Rice Lake and the Lower Trent
Water levels on Rice Lake, Upper and the Lower Trent River are above average for this time of year. The lake levels and flows are expected to continue rising into the weekend.
Severn River
Lake Simcoe's water levels are above average and above full, and they are expected to increase from the rain amounts received. Black River flows are above average and increasing. Lake Simcoe outflows have been increased and will be managed in consideration of Black River flows and Severn River inflow trends. Flows on the Severn River are high and are likely to remain high.