May 08, 2017

Rideau River Levels Reaching Peak

For more information, contact:

  • Patrick Larson
  • RVCA Senior Water Resources Technician
  • 613-692-3571 or 1-800-267-3504 ext. 1210
  • 613-799-9423 (cell)

Flood levels can be expected to decline through the afternoon today as peaks are being reached on the Rideau and tributaries.

Peak levels have been or are being reached in the lower Rideau watershed downstream of Smiths Falls as runoff from the heavy weekend rains passes through the system. The general indication is that levels are stabilizing and will decline over the afternoon.

The Long Reach of the Rideau has stabilized and can be expected to start to decline this afternoon. It will take a couple of days for the flood waters to fully recede from the roadways. Hilly Lane, for example, has over 30 centimetres of water to shed.

The Rideau Canal reservoir lake levels continue to be well above the “Full Supply Limit”. Upper Rideau Lake has begun to decline and Parks Canada staff will cut back the outflow to Big Rideau to help reduce levels there. Outflow continues to be passed through the Bolingbroke Dam in an effort to reduce flood levels on Bobs and Crow Lakes. The unfortunate recipient of that outflow is Christie Lake where flooding is also occurring. Flows in the Tay through Perth are presently on a downward trend but the recession may be prolonged by the outpouring from Bobs Lake.

Residents are advised to stay away from watercourses where flows are high and where banks might be unstable. Parents are encouraged to explain these dangers to their children.

Only if it is safe to do so, the public is encouraged to share photos of water conditions in their area via RVCA Facebook (@RideauValleyConservationAuthority) and Twitter (@RideauValleyCA).

Conservation Authority staff will continue to monitor conditions and will issue updates as warranted.

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, also check the webpage of the Ottawa River Regulation Planning Board at

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.

Contact Us

Rideau Valley Conservation Authority
3889 Rideau Valley Drive
Manotick, Ontario K4M 1A5

613-692-3571, 1-800-267-3504



Regular Hours: Monday to Friday, 8:30 a.m. to 4:30 p.m.

Member of: conservation ontario