Watershed Conditions Statements

Water levels in the Rideau Valley are expected to reach levels previously reached on April 7. Rainfall will continue to cause levels to rise again inundating those locations flooded recently in the spring freshet. Road ways in the communities on the Long Reach of the Rideau River between Kars and Kemptville have already been water covered or will be later today. Belmont Avenue and the Windsor Park pathway in Ottawa South and Brantwood Park in Ottawa East will be flooded again. No other flooding in the urban area adjacent to the Rideau River is expected to be flooded. All of…
Flooding is expected in the Rideau River watershed today and through the weekend. Previous rain from the beginning of the week has increased water levels throughout the watershed. Parks Canada staff have been making adjustments at all dams to reduce the water levels with some success. However, there is still excess water in the Rideau Canal reservoir lakes. Christie Lake on the Tay River, is expected to have further flood issues as water is released from Bobs Lake to relieve ongoing high water there. Releases from Big Rideau Lake will have to be made today which will increase flows downstream.…
Rain forecast for Friday and Saturday is expected to cause levels to increase again.. Parks Canada staff had begun preparations for the opening of the Rideau Canal navigation season prior to the heavy rain last Monday. Dams that had been closed had to be re-opened to pass water through the system to bring levels down. The level on the Long Reach had begun to decline but will increase again due to rain that is forecast for Friday and Saturday. A widespread weather system is forecast to drop a two day total of 35 to 70 millimetres of rain on Eastern…
Rain forecast for Friday and Saturday is expected to cause water levels to continue to rise through the weekend. This Flood Warning applies to areas around Lac Deschene, at Petrie Island and at Boise Village to the east of Cumberland. Another rain event is forecast for Friday and Saturday with a possible two-day total of 35 millimetres to as much as 70 mm. Increased water levels will occur whatever the total rainfall is. Levels could increase by 25 to 35 centimetres depending on timing, location and amount of rain. The rain is forecast to taper off on Sunday so a…
Rain on Monday has pushed water levels in the Ottawa River above the peak reached last week. This Flood Warning is specific to areas around Lac Deschene, at Petrie Island and at Boise Village, east of Cumberland. A short-lived peak can be expected on Wednesday. Rain, possible on Thursday but probable for Friday and through the weekend, is expected to increase levels further. Peak elevation at Britannia last week was 59.924 metres above sea level. At 10:00 this morning, the level was 60 metres. Downstream of the Chaudiere Falls the peak level last week was 44.09 metres. The measurement this…
The rain event yesterday has caused water levels in the Rideau watershed to rise again. Water levels in the Rideau Valley had fallen close to historical average levels since the spring freshet peak on April 7. As much as 60 millimetres of rain on Monday has caused levels to increase again. Another 70 millimetres is forecast to start Thursday and continue through the weekend which can be expected to cause a further rise of water levels. Low-lying communities along the Long Reach of the Rideau between Kars and Kemptville can expect to see out of bank levels and it is…
Rain forecast for the first week of May can be expected to cause water levels to rise significantly in the Ottawa River. Rainfall forecast for today could raise levels to what were reached last week. Additional rain forecast to fall this week can be expected to at least maintain levels and possibly cause further increases.around Lac Deschene, at Petrie Island and at Boise Village, east of Cumberland. Within the Rideau watershed, levels will increase but no flooding issues are expected at this time with the exception of Bobs and Christie Lakes which have continued to have high levels since the…
The rise of flood waters on the Ottawa River is slow but continuing and is approaching the 1:10 year flood frequency*. The slow rise of flood waters on the Ottawa River will continue today aided by runoff from the overnight rains. Levels had dropped yesterday on Lac Deschene but have risen again today. Downstream of Chaudiere Falls the rate of rise decreased slightly but that is likely to change with the impact of the rain. The locations at risk of flooding on the Ottawa River within the jurisdiction of the Rideau Valley Conservation Authority are communities around Lac Deschene (e.g.…
The drought status in the Rideau River watershed that was left at “Minor” after a dry year in 2016 is, by this statement, reduced to “Normal”. The uncertainty that prompted holding the Minor status through the winter was because it wasn’t clear what state groundwater resources had been left at as the onset of winter arrived. With a period of warmer temperatures and the loss of much of the snow cover by late March, there was an opportunity to access the monitoring wells in the Rideau River watershed. Measurements indicated that groundwater levels had been restored to about the long…
As water levels and flows in the Rideau River watershed recede, levels on the Ottawa River have been rising. Rain on Saturday and Sunday had little impact on stream flows anywhere in the Rideau watershed. Rain forecast for Wednesday and Thursday of about 30 millimetres can be expected to cause flows to rise by as much as 50 cubic metres per second on the Rideau. This will not be enough to bring on the return of flooding in those areas recently affected. Levels on three of the four Rideau Canal reservoir lakes have been declining very slowly but are sensitive…
With access ways to the waterfront properties on the Long Reach of the Rideau River (Kars to Burritts Rapids) again passable, the Flood Warning, in place for the last week, is now reduced to Flood Watch.  Rain forecast for Saturday evening into Sunday is expected to cause an upturn in flows in the Rideau system. However, flows are expected to have receded sufficiently by then that the increase will have a minor impact. The expectation is that flows, as measured at the recording station at Carleton University, will increase to about 280 cubic metres per second (cms) by early Monday.…
Water levels have been dropping throughout the Rideau watershed since Saturday but not all flooded areas are fully dry yet. Water levels have dropped about 22 centimetres since the Saturday peak on the Long Reach between Burritts Rapids and Manotick. Another 34 centimetres are left to go on Hilly Lane and similar amounts on the neighbouring waterfront communities near Kemptville. Until those communities have safe access restored, the Flood Warning will remain in effect. The decline in levels in the Long Reach will be slowed by rain forecast for tomorrow and by water that has to be released from Big…
Runoff from the rain event on Thursday is working its way through the system leaving several waterfront communities still without access to their properties. Water levels have been holding more or less steady for the last few hours. A definite peak has not yet been reached but can be expected today. Cooler temperatures overnight have slowed the runoff process. Temperatures of over 10 degrees forecast for today will cause much of the remaining snow and ice to melt and run off today which will keep levels up for the short term. Once a definite decline of levels begins, Parks Canada…
Heavy rain on Thursday has caused streamflows and lake levels to increase significantly in the Rideau River watershed. The amount of rain that fell in eastern Ontario wasn’t quite as much as forecast but it is certainly having an impact. Such water levels were last reached in 2014. The worst impact is in North Grenville and rural Ottawa near the confluence of Kemptville Creek with the Rideau River. Some street and pathway flooding is occurring in Ottawa South adjacent to and in Windsor Park and in Ottawa East in Brantwood Park. No residential flooding in urban Ottawa has been reported…
Rain presently falling is causing flows in the Rideau River to increase toward thresholds at which flooding can be expected to cause access issues to lower lying waterfront properties. The area first affected will be the Long Reach of the Rideau between Kars and Kemptville. In particular, access to Hilly Lane, Cedar Beach, Rideau Glen and other neighbourhoods on that reach of the river can be expected to be compromised as the rain enters the system today. Rain forecast in the order of fifty-five millimetres (mm) on Thursday and Friday can be expected to be followed by a peak on…
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Contact Us

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

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

Email:
info@rvca.ca

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

Member of: conservation ontario