News & Events

Latest Forecast Rain Expected to Raise Levels Again

 (WCS – 41/2017)  November 2, 2017 –  Water levels that were already high from rain on Sunday and Monday are expected to increase again if rain forecast for Thursday and Friday falls on the Rideau River watershed.  

About 12 millimetres (mm) of rain fell overnight and as much as 40 mm more is expected. This could cause flows in the Rideau below Mooney’s Bay to increase to about 320 cubic metres per second. While not an issue in the lower sections of the system, such flows typically mean flooding of low-lying areas on the Long Reach, the section of the river between Manotick and Burritts Rapids, with the access roads to the river side communities at risk.

High flows on the Tay River in Perth continue with most of the flow directed through the Little Tay which has caused flooding in Stewart Park. The construction site at Haggart Island Dam is being monitored closely.

The forecast rain can be expected to cause increased flows in the smaller streams such as Steven Creek. Residents in North Gower can once again expect to see the banks close to full through to next week.

Residents are advised to stay away from rivers as the forecasted weather may rapidly increase river flows, and cause slippery river banks.  Parents are encouraged to explain these dangers to their children.

For water level and flow information in the Rideau system as well as the Ottawa River, visit the RVCA Streamflows and Water Levels webpage at:

For more information about conditions on the Ottawa River, check the webpage of the Ottawa River Regulation Planning Board at .


More Information

Contact: Patrick Larson, RVCA Senior Water Resources Technician

Rideau Valley Conservation Authority

613-692-6831, 1-800-267-3504 ext. 1210 or cell 613-799-9423

“Rideau Valley Conservation Authority is a partnership of municipalities within the Rideau Valley watershed created under the Conservation Authorities Act to deliver a range of programs in watershed management and natural resource conservation.” 

RVCA Watershed Conditions Statements:

  • Water Safety – High flows, unstable banks, melting ice or other factors that could be dangerous for recreational users such as anglers, canoeists, hikers, children, pets, etc. Flooding is not expected.
  • Flood Outlook – Early notice of the potential for flooding based on weather forecasts, calling for heavy rain, snow melt, high winds or other conditions that could lead to high runoff, cause ice jams and/or lakeshore flooding or erosion.
  • Flood Watch – Flooding is possible in specific watercourses or municipalities. Municipalities, emergency services and individuals in flood prone areas should prepare.
  • Flood Warning – Flooding is imminent or already occurring in area watercourses.