RVCA (1140)
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Main Office Phone Numbers : 613-692-3571 / 1-800-267-3504
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May 17, 2019 — Rideau Valley Conservation Authority (RVCA), in conjunction with the Mississippi Valley Conservation Authority (MVCA) and South Nation Conservation (SNC) is maintaining the FLOOD WARNING issued on April 19, 2019 for the areas under our jurisdiction along the Ottawa River. The most recent analysis from the Ottawa River Regulation Committee (ORRC) indicate that water levels along the lower Ottawa River from Chats Lake to the Grenville/ Hawkesbury area are slowly declining but remain high. All flood-prone areas along the Ottawa River from Lac Coulonge down to the Montreal Archipelago are at risk as spring runoff continues along…
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May 10, 2019 — Rideau Valley Conservation Authority (RVCA), in conjunction with the Mississippi Valley Conservation Authority (MVCA) and South Nation Conservation (SNC) is maintaining the FLOOD WARNING issued on April 19, 2019 for the areas under our jurisdiction along the Ottawa River. The most recent analysis from the Ottawa River Regulation Committee (ORRC) indicate that water levels along the Ottawa River from Mattawa to Montreal are increasing due to recent precipitation and increased flow from the upper part of the watershed. Water levels are not expected to reach the levels observed last week over the forecasted period. All flood-prone…
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May 1, 2019 — Rideau Valley Conservation Authority (RVCA), in conjunction with the Mississippi Valley Conservation Authority (MVCA) and South Nation Conservation (SNC) is maintaining the FLOOD WARNING issued on April 19, 2019 for the areas under our jurisdiction along the Ottawa River. The most recent model outputs from the Ottawa River Regulation Committee (ORRC) indicate that water levels have peaked on Lac Coulonge. From Chats Lake down to Hawkesbury/Grenville, levels have stabilized but are expected to increase due to forecasted rain of 15 to 35 mm on a large part of the basin starting today. All flood-prone areas along the…
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May 3, 2019 — Rideau Valley Conservation Authority (RVCA), in conjunction with the Mississippi Valley Conservation Authority (MVCA) and South Nation Conservation (SNC) is maintaining the FLOOD WARNING issued on April 19, 2019 for the areas under our jurisdiction along the Ottawa River. The most recent model outputs from the Ottawa River Regulation Committee (ORRC) indicate that water levels have peaked on Lac Coulonge and are expected to begin rising again over the next few days. Along the Ottawa River below Lac Coulonge, levels are expected to remain stable or slowly decline over the next few days in all locations. All flood-prone areas…
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April 25, 2019 — Rideau Valley Conservation Authority (RVCA), in conjunction with the Mississippi Valley Conservation Authority (MVCA) and South Nation Conservation (SNC) is maintaining the FLOOD WARNING issued on April 19, 2019 for the areas under our jurisdiction along the Ottawa River. Significant rainfall has fallen over the Ottawa River basin since Thursday, April 18, 2019. There is additional rainfall amounts of 25 to 50 mm forecast over the next 24 to 36 hours. All flood-prone areas along the Ottawa River from Lac Coulonge down to the Montreal Archipelago are at risk. Peak water levels across many areas of the…
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April 8,2019 – With below seasonal temperature and no significant precipitation over the past several days, water levels and flows continue to decline slowly across most areas of the Rideau Valley Watershed. The water level/flow decline is expected to continue this week based on the current weather forecast of only single digit high temperatures and the possibility of rain on Friday. At this time most of the snow in our watershed has already melted but some snow/ice does remain near trees or shaded areas. Contrary to the above, water levels and flows in Bob’s Lake and Christie Lake, located in…
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April 03, 2019
Flood Warning has Ended, But Flood Watch Still in Effect for Low-lying Areas in Rideau Valley Watershed
April 3, 2019 -- With limited precipitation and below seasonal temperatures so far this week, water levels and flows have somewhat stabilized across the Rideau Valley Watershed since last weekend. The flood warning issued over the weekend is now over for the areas listed below; however, a flood watch is still in effect for these areas. With snow still on the ground in some areas, combined with forecasted warmer temperatures and precipitation later this week, increased water levels and flows in all waterways in the Rideau Valley Watershed are still expected in the days to come. Areas currently under a…
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March 31, 2019
Flood Warning Update #1 -- River Levels are now Causing Flooding in Some Low-lying Areas in Rideau Valley Watershed
March 31, 2019 – Significant precipitation this weekend combined with runoff from melting snow has increased water levels and flows in all waterways in the Rideau Valley Watershed. Although no significant precipitation is expected during the next few days, water levels and flows will likely continue to stay high in most areas due to on-going runoff from melting snow. The areas that are currently experiencing flooding conditions, or will be very soon, include: The smaller creeks and streams in the lower Rideau Valley Watershed, including the low-lying roads and waterfront properties adjacent to the Jock River (near Richmond) and Stevens Creek…
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March 30, 2019
Forecast Rain Will Likely Impact Long Reach Waterfront Communities, and Low-lying Areas Along the Jock River and Stevens Creek
March 30, 2019 – After today’s snow and freezing-rain stops, a rainfall in the order of twenty-five millimetres is forecast before the system ends sometime tomorrow. This rainfall, along with runoff from melting snow, is expected to increase water levels and flows in all waterways in the Rideau Valley Watershed. Furthermore, flooding will most likely to occur in the following areas: The smaller creeks and streams in the lower Rideau Valley Watershed. This would include the low-lying roads and waterfront properties adjacent to the Jock River (near Richmond) and Stevens Creek (near North Gower), and any connected creeks or ditches.…
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March 29, 2019 – Since early March, we have experienced a very gradual snow melt with limited precipitation across much of the Rideau Valley Watershed. In the lower Rideau Valley Watershed (North Grenville and Ottawa) and in the Tay Valley Watershed, there still remains above average snow pack which indicates a potential for above average flooding in low lying areas adjacent to any rivers, creeks or ditches. The current weather forecast indicates that it will remain cool (near freezing) for Saturday and Sunday with a mix of rain, freezing rain, and snow on Saturday. However, there is uncertainty about how…
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December 20, 2018
Heavy Rains will lead to Unsafe Conditions on Rivers and Lakes Throughout Rideau Watershed
December 20, 2018 — A significant weather system is expected to cross through our area over the next two days. Environment and Climate Change Canada is forecasting up to 40 mm of rain starting tonight, Thursday, December 20 through Friday, December 21. The forecast calls for above freezing temperatures during the day on Friday. Water levels across the Rideau Valley watershed are generally normal to slightly below normal and the amount of snow cover is slightly below normal for this time of year. The forecasted heavy rain and warm air temperatures are expected to melt most of the snow on…
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September 28, 2018
Low Water Status Update in Rideau River Watershed
September 27, 2018 – This statement is to advise that the low water status in the Rideau River watershed has returned to “Normal” except for the Kemptville Creek subwatershed which is at “Minor” Severity, down from “Moderate” Severity. Rain over the last week pushed totals above what is normal for the time of year at most climate monitoring sites in the region. The forecast is indicating more rainfall next week that will begin to restore streamflows to historical averages. The exception is at the Environment Canada site in Kemptville which has a 90 day total at 67% of normal, well below…
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August 31, 2018
Low Water Status Continued in Rideau River Watershed
August 30, 2018 – This statement is to advise that the low water status in the Rideau River watershed remains at “Minor” Severity except for the Kemptville Creek sub-watershed which continues to be “Moderate” Severity. Flow in Kemptville Creek has continued to be very low. The amount of rain measured in the Kemptville Creek sub-watershed for the same time period is well below the historical average at both Kemptville and at the Brockville Airport near the Creek headwaters The impact of the low flow is that aquatic creatures living in the Creek are confined to smaller and smaller pools that…
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This statement is to advise that the low water status in the Rideau River watershed has been reduced to Minor Severity. Longer range forecasts indicate warmer and dryer than normal through the rest of the summer and into the fall. If that forecast comes to pass, flows and levels can be expected to fall well below normal. Present conditions are generally close to normal but because of declining flows and forecasts, the low water status is being reduced from Moderate to Minor Severity rather than being withdrawn entirely. Record rainfall was measured at several climate monitoring stations in eastern Ontario…
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