(WCS - 08/2023)
April 18, 2023 – The previous Flood Warning and Flood Watch messages issued on April 6^th, 8^th and 11^th 2023 are being updated to reflect current conditions. Unlike the Ottawa River Watershed which is currently experiencing high water conditions, the water levels and flows in the Rideau Valley Watershed are declining and approaching seasonal levels in all waterways except for Bobs Lake and Christie Lake.

These lakes are near capacity and although the water level increases are now almost stabilized, the water levels may still increase with any significant rain. The current forecast indicates between 25 mm and 35 mm of rain could fall next Sunday. As such, the water levels in Bobs Lake and Christie Lake will likely increase due to the forecasted rain. Parks Canada staff are closely monitoring the water levels in these lakes, and operations at the Bolingbroke Dam will take place as required, to balance the levels in Bobs Lake and Christie Lake.  

At this time, a FLOOD WARNING is being maintained for properties around Bobs Lake and Christie Lake. 

The FLOOD WATCH issued on April 6th, 2023 for the properties around Big Rideau Lake is now over.

Residents in flood-prone or low-lying areas that are historically susceptible to flooding should take the necessary precautions to protect their property, such as:

• Ensuring sump pump is clear, in good working condition and has a backwater valve
• Ensuring easy access to a portable backup generator and pump
• Ensuring downspouts are clear and the outlet is at least 3 metres from the dwelling
• Securing items that might float away as flows increase
• Removing valuable items from basements or lower floors that could be subject to flooding
• Keeping emergency phone numbers handy
• Familiarizing yourself with your municipality’s Emergency Preparedness Plan

This watershed conditions statement is in effect until Friday, April 28, 2023 and may be updated at that time unless the forecast or conditions change.

- end - 

More Information:

Contact: Brian Stratton, RVCA Manager Engineering Services
Rideau Valley Conservation Authority
613-692-6804, 1-800-267-3504 ext. 1141

www.rvca.ca/watershed-conditions

"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 specific watercourses or municipalities.

Water Conditions Statement: Flood Warning — Lower Ottawa River

April 17, 2023 —This FLOOD WARNING statement is an update to the Flood Watch issued for areas along the Lower Ottawa River (Arnprior to Hawkesbury) on April 14^th, 2023. ​     ​​

​​Water levels are expected to continue rising within the Ottawa River Basin due to increased snowmelt associated with above normal snowpack and high temperatures over the weekend.

Most of the water currently entering the Ottawa River is originating in areas where there are no reservoirs or retention capacity. The Ottawa River Regulating Committee is managing principal reservoirs to reduce river flows to downstream areas. 

The Ottawa River Regulating Committee anticipates that water levels along the main stemof the Ottawa River are expected to exceed major flood levels, impacting several streets, lawns and houses in low-lying areas. Flood levels are expected to remain well below historic high flood levels. 

Impacted locations include flood-prone areas at Chats Lake, Constance Bay area, Britannia / Lac Deschênes, Cumberland, City of Clarence-Rockland, Township of Alfred Plantagenet and other vulnerable areas down to Montreal.

MVCA - Areas of Concern:

• Water levels in the Constance Bay area  are expected to rise by about 0.7 m above the current elevation* over the next 2-3 days. 

RVCA - Areas of Concern:

• Water levels in the Britannia area (Grandview Road and the Belltown Community)  are expected to rise by about 0.65 m above the current elevation* over the next 2-3 days. 
• Water levels east of Cumberland Village (Boise Village, Morin Road, Leo Lane) are expected to rise by about 1.0 m above the current elevation* over the next 2-3 days. 

SNC - Areas of Concern:

Water levels in the Rockland area are expected to rise by about 1.0 m above the current elevation* over the next 2-3 days. 

MNRF - Areas of Concern:

Water levels in the Hawkesbury area are expected to rise by about 0.50 m above the current elevation* over the next 2-3 days. 

* Current elevation as of 9 a.m., Monday, April 17, 2023.

Peak river conditions remain dependent on snowmelt and rainfall amounts. A rainfall event is forecasted next weekend that will add water to the river at a time when flows are near flood thresholds. There is uncertainty on the rainfall amounts and the areas that could be affected.

Residents in flood-prone areas are encouraged to closely follow changing conditions and to take necessary measures. Residents are advised to stay away from watercourses where flows are high and where banks might be unstable. Parents are encouraged to explain dangers to children and provide appropriate supervision around all waterbodies. 

The Mississippi Valley, Rideau Valley, and South Nation Conservation Authorities monitor water levels and weather forecasts with the Ministry of Natural Resources and Forestry as part of the Flood Forecasting and Warning Program. Updates are provided as conditions change.

The Ottawa River Regulating Committee will be reassessing forecast conditions and providing hydrological condition updates on its website daily at www.ottawariver.ca/forecasts.

To view current flood warnings across Ontario, visit: www.ontario.ca/law-and-safety/flood-forecasting-and-warning-program.     

This FLOOD WARNING STATEMENT is in effect until April 28, 2023 at 5:00 PM.      

FOR MORE INFORMATION: 
Brian Stratton
RVCA Manager Engineering Services
613-692-3571 or 1-800-267-3504 ext. 1141

Definitions:

• Water Conditions Statement: Water Safety: indicates that high flows, melting ice or other factors could be dangerous for such users as boaters, anglers and swimmers but flooding is not expected.

• Water Conditions Statement: Flood Outlook: gives early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high winds or other conditions.

• Flood Watch: potential for flooding exists within specific watercourses and municipalities.

• Flood Warning: flooding is imminent or occurring within specific watercourses and municipalities.

-end- 

Déclaration sur l’état de la rivière : Avertissement de crue:  - Cours inférieur de la rivière des Outaouais

17 avril 2023 — Cet déclaration d’AVERTISSEMENT DE CRUE fait suite à la veille de crue émise pour les secteurs situés le long du cours inférieur de la rivière des Outaouais (d’Arnprior à Hawkesbury) le 14 avril 2023.       

On s’attend à ce que les niveaux d'eau continuent d’augmenter dans le bassin de la rivière des Outaouais en raison de l’augmentation de la fonte des neiges associée à une accumulation de neige supérieure à la normale et à aux températures élevées de la fin de semaine.

La majeure partie de l’eau qui pénètre actuellement dans la rivière des Outaouais provient de régions où il n’y a pas de réservoirs ou de capacité de rétention. Le Comité de régularisation de la rivière des Outaouais gère les principaux réservoirs afin de réduire le débit de la rivière vers les zones en aval.

Le Comité de régularisation de la rivière des Outaouais prévoit que les niveaux d’eau le long du tronçon principal de la rivière des Outaouais devraient dépasser les seuils d’inondation majeure, ce qui aura des répercussions sur plusieurs rues, pelouses et maisons dans les zones basses. On s’attend à ce que les niveaux d’inondation demeurent bien en deçà des niveaux d'inondation historiques les plus élevés.

Les endroits touchés comprennent les secteurs sujets aux inondations du lac des Chats, de la région de la baie Constance, de Britannia / Lac Deschênes, de Cumberland, de la Cité de Clarence-Rockland, du canton d’Alfred et Plantagenet et d’autres zones vulnérables jusqu’à Montreal.    

Secteurs préoccupants – MVCA :

• Les niveaux d’eau dans la région de la baie de Constance devraient augmenter d’environ 0,7 m au-dessus du niveau actuel* au cours des 2-3 prochains jours.

Secteurs préoccupants - RVCA :

• Les niveaux d’eau dans le secteur de Britannia (chemin Grandview et communauté de Belltown) devraient augmenter d’environ 0,65 m au-dessus du niveau actuel* au cours des 2-3 prochains jours.
• Les niveaux d’eau à l’est du village de Cumberland (village de Boise, chemin Morin, ruelle Leo) devraient augmenter d’environ 1,0 m au-dessus du niveau actuel* au cours des 2-3 prochains jours.  

Secteurs préoccupants – CNS :

• Les niveaux d’eau dans la région de Rockland devraient augmenter d’environ 1,0 m au-dessus du niveau actuel* au cours des 2-3 prochains jours.

Secteurs préoccupants - MNRF :

• Les niveaux d’eau dans la région de Hawkesbury devraient augmenter d’environ 0,50 m au-dessus du niveau actuel* au cours des 2-3 prochains jours.

* Niveau actuel à 9 h, le lundi 17 avril 2023.

Les conditions de pointe de la rivière dépendent toujours de la fonte des neiges et des quantités de précipitations. Un épisode pluvieux est prévu en fin de semaine, qui ajoutera de l'eau à la rivière à un moment où les débits sont proches des seuils d'inondation. Les quantités de pluie et les zones susceptibles d'être touchées sont incertaines.

Les résidents des zones sujettes aux inondations sont invités à suivre de près l’évolution des conditions et à prendre les mesures nécessaires. Il est conseillé aux résidents de rester à l’écart des cours d’eau où les débits sont élevés et où les berges pourraient être instables. On demande aux parents d'expliquer ces dangers à leurs enfants et d'assurer une surveillance appropriée autour de tous les cours d'eau.

Les offices de protection de la nature de la vallée de la Mississippi, de la vallée de la Rideau et de la Nation Sudsurveillent les niveaux d'eau et les prévisions météorologiques avec le ministère des Richesses naturelles et des Forêts dans le cadre du programme de prévision et d'alerte des crues. Des mises à jour sont émises au fur et à mesure que les conditions changent.

Le Comité de régularisation de la rivière des Outaouais réévaluera les conditions prévues et publiera des mises à jour sur l’état de la rivière sur son site Web tous les jours à www.ottawariver.ca/forecasts.

Pour consulter les avertissements d’inondation actuels en Ontario, visitez : www.ontario.ca/law-and-safety/flood-forecasting-and-warning-program.    

La présente DÉCLARATION D'AVERTISSEMENT DE CRUE est en vigueur jusqu’au 28 avril 2023 à 17 h 00.      

     
POUR PLUS D’INFORMATIONS : 

Brian Stratton
RVCA Manager Engineering Services
613-692-3571 or 1-800-267-3504 poste 1141

Définitions :

• Communiqué sur les conditions des bassins versants – Sécurité aquatique : indique que des débits forts, de la glace fondante ou d’autres facteurs peuvent être dangereux pour des utilisateurs comme les plaisanciers, les pêcheurs à la ligne et les baigneurs, mais qu’une crue n’est pas prévue.

• Communiqué sur les conditions des bassins versants – Perspective de crue :préavis de crue possible basé sur des prévisions de pluies abondantes, de fonte des neiges, de forts vents ou autre.

• Veille de crue :possibilité de crue pour des cours d’eau et municipalités spécifiques.

• Avertissement de crue : crue immimente ou en cours pour des cours d’eau et
  municipalités spécifiques.

Water Conditions Statement: Flood Watch — Lower Ottawa River

April 14, 2023 — This FLOOD WATCH statement is an update to the Flood Outlook Statement issued for areas along the Lower Ottawa River (Arnprior to Hawkesbury) on April 7^th, 2023.      

Due to signifiant snow melt and forecasted rainfall anticipated on Sunday and Monday, water levels are expected to continue rising within the Ottawa River Basin. 

Most of the water currently entering the Ottawa River is located in areas where there are no reservoirs or retention capacity. The current strategy by the Ottawa River Regulating Committee is to reduce the amount of water released from the principal reservoirs to prevent water levels exceeding major flood levels. 

The Ottawa River Regulating Committee anticipates that water levels along the main stem of the Ottawa River will exceed minor flood levels, impacting several streets and lawns in low-lying areas. 

This includes flood-prone areas at Lake Coulonge, Chats Lake, Britannia / Lac Deschênes, Pointe-Gatineau, Cumberland, City of Clarence-Rockland, Thurso and other vulnerable areas down to Montreal. Areas at greatest risk are located in Cumberland and Rockland.

While there are currently no major flooding indicators of concern, it is still too early to forecast peak river conditions which remain dependent on snowmelt and rainfall amounts. 

Residents in flood-prone areas are encouraged to closely follow changing conditions and to take necessary measures. Residents are advised to stay away from watercourses where flows are high and where banks might be unstable. Parents are encouraged to explain dangers to children and provide appropriate supervision around all waterbodies. 

The Mississippi Valley, Rideau Valley, and South Nation Conservation Authorities monitor water levels and weather forecasts with the Ministry of Natural Resources and Forestry as part of the Flood Forecasting and Warning Program. Updates are provided as conditions change.

The Ottawa River Regulating Committee will be reassessing forecast conditions and providing hydrological condition updates on its website daily at www.ottawariver.ca/forecasts.

To view current flood warnings across Ontario, visit: www.ontario.ca/law-and-safety/flood-forecasting-and-warning-program.     

This FLOOD WATCH STATEMENT is in effect until April 28, 2023 at 5:00 PM.      

FOR MORE INFORMATION: 
Brian Stratton
RVCA Manager Engineering Services
613-692-3571 or 1-800-267-3504 ext. 1141

Definitions:

• Water Conditions Statement: Water Safety: indicates that high flows, melting ice or other factors could be dangerous for such users as boaters, anglers and swimmers but flooding is not expected.

• Water Conditions Statement: Flood Outlook: gives early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high winds or other conditions.

• Flood Watch: potential for flooding exists within specific watercourses and municipalities.

• Flood Warning: flooding is imminent or occurring within specific watercourses and municipalities.

-end- 

Déclaration sur l’état de la rivière : Veille de crue:  - Cours inférieur de la rivière des Outaouais

14 avril 2023 — Cet déclaration de VEILLE DE CRUE fait suite à la déclaration de PERSPECTIVE DE CRUE émise pour les régions situées le long du cours inférieur de la rivière des Outaouais (d'Arnprior à Hawkesbury) le 7 avril 2023.    

En raison de l'importante fonte des neiges et des précipitations prévues dimanche et lundi, les niveaux d'eau devraient continuer à augmenter dans le bassin de la rivière des Outaouais. 

La majeure partie de l'eau qui pénètre actuellement dans la rivière des Outaouais se trouve dans des zones dépourvues de réservoirs ou de capacité de rétention. La stratégie actuelle du Comité de régularisation de la rivière des Outaouais consiste à réduire la quantité d'eau libérée par les principaux réservoirs afin d'éviter que les niveaux d'eau ne dépassent les seuils d'inondation majeurs. 

Le Comité de régularisation de la rivière des Outaouais prévoit que les niveaux d’eau le long du cours principal de la rivière des Outaouais dépasseront les seuils d’inondation mineure, ce qui aura des répercussions sur plusieurs rues et pelouses dans les zones basses. 

Cela comprend les zones inondables du lac Coulonge, du lac des Chats, de Britannia / Lac Deschênes, de Pointe-Gatineau, de Cumberland, de la Cité de Clarence-Rockland, de Thurso et d’autres zones vulnérables jusqu’à Montréal. Les zones les plus menacées se situent dans les secteurs de Cumberland et de Rockland.

Bien qu’il n’y ait actuellement aucun indicateur majeur d’inondation préoccupant, il est encore trop tôt pour prévoir les conditions de pointe des rivières qui dépendent toujours de la fonte des neiges et des quantités de précipitations. 

Les résidents des zones sujettes aux inondations sont invités à suivre de près l’évolution des conditions et à prendre les mesures nécessaires. Il est conseillé aux résidents de rester à l’écart des cours d’eau où les débits sont élevés et où les berges pourraient être instables. On demande aux parents d'expliquer ces dangers à leurs enfants et d'assurer une surveillance appropriée autour de tous les cours d'eau.

Les offices de protection de la nature de la vallée de la Mississippi, de la vallée de la Rideau et de la Nation Sudsurveillent les niveaux d'eau et les prévisions météorologiques avec le ministère des Richesses naturelles et des Forêts dans le cadre du programme de prévision et d'alerte des crues. Des mises à jour sont émises au fur et à mesure que les conditions changent.

Le Comité de régularisation de la rivière des Outaouais réévaluera les conditions prévues et publiera des mises à jour sur l’état de la rivière sur son site Web tous les jours à www.ottawariver.ca/forecasts.

Pour consulter les avertissements d’inondation actuels en Ontario, visitez : www.ontario.ca/law-and-safety/flood-forecasting-and-warning-program.    

La présente DÉCLARATION DE VEILLE DE CRUE est en vigueur jusqu’au 28 avril 2023 
à 17 h 00.      

     
POUR PLUS D’INFORMATIONS : 

Brian Stratton
RVCA Manager Engineering Services
613-692-3571 or 1-800-267-3504 poste 1141

Définitions :

• Communiqué sur les conditions des bassins versants – Sécurité aquatique : indique que des débits forts, de la glace fondante ou d’autres facteurs peuvent être dangereux pour des utilisateurs comme les plaisanciers, les pêcheurs à la ligne et les baigneurs, mais qu’une crue n’est pas prévue.

• Communiqué sur les conditions des bassins versants – Perspective de crue :préavis de crue possible basé sur des prévisions de pluies abondantes, de fonte des neiges, de forts vents ou autre.

• Veille de crue :possibilité de crue pour des cours d’eau et municipalités spécifiques.

• Avertissement de crue : crue immimente ou en cours pour des cours d’eau et
  municipalités spécifiques.

(WCS - 07/2023)

April 11, 2023 – The previous Flood Warning and Flood Watch messages issued on April 6th and 8^th, 2023 are being updated to reflect current conditions. Rainfall amounts between 40 and 70 mm fell across the Rideau Valley Watershed on April 5, 2023, resulting in increased water levels and flows across the watershed which caused flood conditions in many low-lying areas adjacent to several rivers, lakes, creeks and ditches. Since that time, water levels have peaked and are receding in most areas, except those areas discussed below.

The short-term weather forecast indicates no precipitation for the next four days. Temperatures are forecasted to remain above zero each day with high temperatures in the double digits. Although mostly melted, some snow remains within the City of Ottawa and the Tay River watershed. The remaining snow is expected to melt over next few days, and will have minimal impact on water levels, except for those areas discussed below.

A FLOOD WARNING remains for the following areas:

• Properties around Bob’s Lake, Christie Lake in the Tay River Watershed. Parks Canada staff are closely monitoring the water levels in Bobs Lake and Christie Lake, and operations at the Bolingbroke Dam will take place as required, to balance the levels in Bobs Lake and Christie Lake.

The FLOOD WARNING previously issued for the areas below has been TERMINATED:

• Properties around the smaller creeks and streams in the lower Rideau Valley Watershed, including the low-lying roads and waterfront properties adjacent to Stevens Creek (near North Gower), and any connected creeks or ditches.  
• The Rideau River between Becketts Landing and Manotick, including Kemptville Creek.

A FLOOD WATCH remains for the following areas:

• Properties around Big Rideau Lake

With the elevated conditions, the potential exists for further impacts if significant additional rain were to occur across the watershed.

Due to the presence of ice cover on the lakes mentioned above and the anticipated water level increases, there is a concern for shoreline damage due to large pieces of ice becoming mobile.  

With changing water levels expected over the coming days, ice cover on lakes, ditches, local streams and rivers will continue to be unstable. Extreme caution should be exercised when near local waterbodies. Parents should inform their children of the risks and provide appropriate supervision.

As temperatures continue to rise, the potential for ice jams remains high in some local streams and rivers, as flows could quickly increase before the ice can melt. Residents are advised to monitor their local river closely for signs of ice jams as spring progresses. RVCA staff will be monitoring conditions but we always welcome unique observations from watershed residents.

Flooding along roadways is also a concern due to current snow/ice buildup on roadside ditches.

Residents in flood-prone or low-lying areas that are historically susceptible to flooding should take the necessary precautions to protect their property, such as:

• Ensuring sump pump is clear, in good working condition and has a backwater valve
• Ensuring easy access to a portable backup generator and pump
• Ensuring downspouts are clear and the outlet is at least 3 metres from the dwelling
• Securing items that might float away as flows increase
• Removing valuable items from basements or lower floors that could be subject to flooding
• Keeping emergency phone numbers handy
• Familiarizing yourself with your municipality’s Emergency Preparedness Plan

This watershed conditions statement is in effect until Tuesday, April 18, 2023 and may be updated at that time unless the forecast or conditions change.

- end - 

More Information:

Contact: Brian Stratton, RVCA Manager Engineering Services
Rideau Valley Conservation Authority
613-692-6804, 1-800-267-3504 ext. 1141

www.rvca.ca/watershed-conditions

"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 specific watercourses or municipalities.

(WCS - 06/2023)

April 8, 2023 – The Flood Warning and Flood Watch issued on April 6, 2023 remains in effect for the Rideau Valley watershed. Flood conditions are present in many low-lying areas adjacent to several rivers, lakes, creeks and ditches. Additional areas have the potential to flood next week, as the remaining snow within the City of Ottawa and the Tay River watershed is expected to finish melting due to multiple days with high temperatures in the double digits.

The short-term weather forecast indicates no precipitation for next few days. Staring on Monday April 10, 2023, temperatures will remain above zero all day with high temperatures in the double digits.

Based on the above, water levels and flows are generally expected to either remain elevated or increase in all waterways in the Rideau Valley Watershed throughout next week. Some specific areas of concern are highlighted below:

A FLOOD WARNING remains for the following areas:

• Properties around Bob’s Lake, Christie Lake and Tay River in the upper Rideau Valley Watershed. Parks Canada staff are closely monitoring the water levels in Bobs Lake and Christie Lake, and operations at the Bolingbroke Dam will take place as required, to balance the levels in Bobs Lake and Christie Lake.
• Flooding impacts are occurring and expected to continue in the following areas:
  • Properties around the smaller creeks and streams in the lower Rideau Valley Watershed, including the low-lying roads and waterfront properties adjacent to Stevens Creek (near North Gower), and any connected creeks or ditches. Although water levels have receded, some risk of further increase exists with the remaining snowpack.
  • The Rideau River between Becketts Landing and Manotick, including Kemptville Creek. The water levels throughout this reach are expected to remain high for at least the next week.

A FLOOD WATCH remains for the following areas:

• Properties around Big Rideau Lake, Upper Rideau Lake, and along the Rideau River from Smiths Falls through Burritts Rapids.
• Low-lying properties (close to Rideau River) on Rideau River Lane and the community of Rideau Gardens. Water levels in this area will remain elevated for at least the next week and may increase somewhat as the snowmelt continues upstream.

With the elevated conditions, potential exists for further impacts if significant additional rain were to occur before the water levels and flows begin to recede.

Due to the presence of ice cover on the lakes mentioned above and the anticipated water level increases, there is a concern for shoreline damage due to large pieces of ice becoming mobile.

With changing water levels expected over the coming days, ice cover on lakes, ditches, local streams and rivers will continue to be unstable. Extreme caution should be exercised when near local waterbodies. Parents should inform their children of the risks and provide appropriate supervision.

As temperatures continue to rise, the potential for ice jams remains high in some local streams and rivers, as flows could quickly increase before the ice can melt. Residents are advised to monitor their local river closely for signs of ice jams as spring progresses. RVCA staff will be monitoring conditions but we always welcome unique observations from watershed residents.

Flooding along roadways is also a concern due to current snow/ice buildup on roadside ditches.

Residents in flood-prone or low-lying areas that are historically susceptible to flooding should take the necessary precautions to protect their property, such as:

• Ensuring sump pump is clear, in good working condition and has a backwater valve
• Ensuring easy access to a portable backup generator and pump
• Ensuring downspouts are clear and the outlet is at least 3 metres from the dwelling
• Securing items that might float away as flows increase
• Removing valuable items from basements or lower floors that could be subject to flooding
• Keeping emergency phone numbers handy
• Familiarizing yourself with your municipality’s Emergency Preparedness Plan

This watershed conditions statement is in effect until Friday, April 14, 2023 and may be updated at that time unless the forecast or conditions change.

- end - 

More Information:

Contact: Brian Stratton, RVCA Manager Engineering Services
Rideau Valley Conservation Authority
613-692-6804, 1-800-267-3504 ext. 1141

www.rvca.ca/watershed-conditions

"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 specific watercourses or municipalities.

Water Conditions Statement: Flood Outlook — Lower Ottawa River

April 7, 2023 — A Flood Outlook Statement is being issued for areas along the Lower Ottawa River (Arnprior to Hawkesbury). 

Based on forecasted higher temperatures and anticipated snow melt, levels and flows along the Ottawa River are expected to increase over the next few days, marking the beginning of the spring freshet in the Ottawa River basin.

Snow cover varies significantly across the 146,300 km² Ottawa River basin, with several areas experiencing above average snow water content. 

Based on current weather forecasts, minor flooding may occur in low-lying areas generally susceptible to flooding along the Lower Ottawa River. 

While there are currently no flooding indicators of concern, it is still too early to forecast peak river conditions which remain dependent on snowmelt and rainfall amounts. 

Residents in flood-prone areas are encouraged to closely follow changing conditions and to take necessary measures. Residents are advised to stay away from watercourses where flows are high and where banks might be unstable. Parents are encouraged to explain dangers to children and provide appropriate supervision around all waterbodies. 

The Mississippi Valley, Rideau Valley, and South Nation Conservation Authorities monitor water levels and weather forecasts with the Ministry of Natural Resources and Forestry as part of the Flood Forecasting and Warning Program. Updates are provided as conditions change.

The Ottawa River Regulating Committee will be reassessing forecast conditions and 
providing hydrological condition updates on its website daily at www.ottawariver.ca/forecasts/

To view current flood warnings across Ontario, visit: www.ontario.ca/law-and-safety/flood-forecasting-and-warning-program     

This FLOOD OUTLOOK STATEMENT is in effect until April 28, 2023 at 5:00 PM. 

FOR MORE INFORMATION: 
Brian Stratton
RVCA Manager Engineering Services
613-692-3571 or 1-800-267-3504 ext. 1141

Definitions:

• Water Conditions Statement: Water Safety: indicates that high flows, melting ice or other factors could be dangerous for such users as boaters, anglers and swimmers but flooding is not expected.

• Water Conditions Statement: Flood Outlook: gives early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high winds or other conditions.

• Flood Watch: potential for flooding exists within specific watercourses and municipalities.

• Flood Warning: flooding is imminent or occurring within specific watercourses and municipalities.

-end- 

Communiqué sur les conditions du bassin versant : Perspective de crue - Cours inférieur de la rivière des Outaouais

Le 7 avril 2023 - Un communiqué de perspective de crue est émis pour les régions situées le long du cours inférieur de la rivière des Outaouais (d'Arnprior à Hawkesbury). 

Selon les températures plus élevées prévues et la fonte des neiges anticipée, les niveaux et les débits d’eau le long de la rivière des Outaouais devraient augmenter au cours des prochains jours, marquant le début de la crue printanière dans le bassin de la rivière des Outaouais.

La couverture de neige varie considérablement à travers les 146 300 km² du bassin de la rivière des Outaouais avec plusieurs régions connaissant une teneur en eau de neige supérieure à la moyenne.     

Selon les prévisions météorologiques actuelles, des inondations mineures pourraient se produire dans les basses terres généralement sujettes aux inondations le long du cours inférieur de la rivière des Outaouais.

Bien qu'il n'y ait actuellement aucun indicateur d'inondation préoccupant, il est encore trop tôt pour prévoir les conditions de pointe de la rivière qui restent dépendantes des quantités de pluie reçues et de la fonte des neiges. 

Les résidents des zones sujettes aux inondations sont invités à suivre de près l'évolution des conditions et à prendre les mesures nécessaires. Il est conseillé aux résidents de ne pas s'approcher des cours d'eau dont le débit est élevé et dont les berges pourraient être instables. 
On conseille aussi aux parents d'expliquer ces dangers aux enfants et à assurer une surveillance appropriée autour de tous les plans d'eau.  

Les offices de protection de la nature des rivières Mississippi, Rideau et de la Nation Sud surveillent les niveaux d'eau et les prévisions météorologiques avec le Ministère des Richesses naturelles et des Forêts dans le cadre du Programme de prévision des crues et d'avertissement du public. Des mises à jour sont communiquées au fur et à mesure que les conditions changent.

Le Comité de régularisation de la rivière des Outaouais réévaluera les conditions prévues et diffusera des mises à jour concernant les conditions hydrologiques sur son site Web tous les jours à www.ottawariver.ca/forecasts.

Pour consulter les avertissements de crues actuels à travers l'Ontario, visitez : 
www.ontario.ca/law-and-safety/flood-forecasting-and-warning-program. 

Ce COMMUNIQUÉ DE PERSPECTIVE DE CRUE est en vigueur jusqu'au 28 avril 2023 à 17 h. 

POUR PLUS D’INFORMATIONS : 

Brian Stratton
RVCA Manager Engineering Services
613-692-3571 or 1-800-267-3504 poste 1141

Définitions :

• Communiqué sur les conditions des bassins versants – Sécurité aquatique : indique que des débits forts, de la glace fondante ou d’autres facteurs peuvent être dangereux pour des utilisateurs comme les plaisanciers, les pêcheurs à la ligne et les baigneurs, mais qu’une crue n’est pas prévue.

• Communiqué sur les conditions des bassins versants – Perspective de crue :préavis de crue possible basé sur des prévisions de pluies abondantes, de fonte des neiges, de forts vents ou autre.

• Veille de crue :possibilité de crue pour des cours d’eau et municipalités spécifiques.

• Avertissement de crue : crue immimente ou en cours pour des cours d’eau et
  municipalités spécifiques.

(WCS – R05/2023)

RIDEAU VALLEY, April 6, 2023 – A combined Flood Warning and Flood Watch is in effect for the Rideau Valley following a significant rain/freezing rain event yesterday. Flood conditions are present in many low-lying areas adjacent to several rivers, creeks and ditches. Additional areas have the potential to flood over the next few days, especially because of snow remaining within the City of Ottawa and the Tay River watershed.

The short-term weather forecast indicates no precipitation for next few days. Daytime temperatures will generally be above zero and night-time temperatures will be below zero for next few days. Temperatures are expected to stay above zero moving into next week.  

Based on the above, water levels and flows are expected to increase or remain elevated in all waterways in the Rideau Valley Watershed throughout next week. Some specific areas of concern are highlighted below:

A FLOOD WARNING is being issued for the following areas:

• Properties around Bob’s Lake, Christie Lake and Tay River in the upper Rideau Valley Watershed.  The water levels are expected to exceed full supply levels over the next 48 hours and may result in flooding for low-lying areas. Parks Canada staff are closely monitoring the water levels in Bobs Lake and Christie Lake, and operations at the Bolingbroke Dam will take place as required, to balance the levels in Bobs Lake and Christie Lake.  
• Flooding impacts are occurring and expected to continue in the following areas:
  • • Properties around the smaller creeks and streams in the lower Rideau Valley Watershed, including the low-lying roads and waterfront properties adjacent to Stevens Creek (near North Gower), and any connected creeks or ditches. 
    • The Rideau River near Becketts Landing and Kemptville Creek, particularly the areas around Hilly Lane, Rideau Glen Lane, Golf Course Lane, Barts Lane and Cedar Beach Lane.
    • The Rideau River near Kars, particularly the areas around Lorne Bridge Road and Rideau Street South.

A FLOOD WATCH is being issued for the following areas:

• Properties around Wolfe Lake and Big Rideau Lake 
• Properties along the Rideau River from Smiths Falls through Burritts Rapids
• The Rideau River near Becketts Landing and Kemptville Creek, particularly the areas around Eligh Lane, Fennel Lane, Lannin Lane, Sheppard Lane, McGahey Lane, Sheilas Way and Harris Road
• Low-lying properties (close to Rideau River) on Rideau River Lane and the community of Rideau Gardens.

With the elevated conditions, potential exists for further impacts if significant additional rain or rapid snow melt were to occur before the water levels and flows begin to recede.

Due to the presence of ice cover on the lakes mentioned above and the anticipated water level increases, there is a concern for shoreline damage due to large pieces of ice becoming mobile.  

With changing water levels expected over the coming days, ice cover on lakes, ditches, local streams and rivers will continue to be unstable. Extreme caution should be exercised when near local waterbodies. Parents should inform their children of the risks and provide appropriate supervision. 

As temperatures continue to rise, the potential for ice jams remains high in some local streams and rivers, as flows could quickly increase before the ice can melt. Residents are advised to monitor their local river closely for signs of ice jams as spring progresses. RVCA staff will be monitoring conditions but we always welcome unique observations from watershed residents.

 Flooding along roadways is also a concern due to current snow/ice buildup on roadside ditches.

Residents in flood-prone or low-lying areas that are historically susceptible to flooding should take the necessary precautions to protect their property, such as:

• Ensuring sump pump is clear, in good working condition and has a backwater valve 
• Ensuring easy access to a portable backup generator and pump
• Ensuring downspouts are clear and the outlet is at least 3 metres from the dwelling 
• Securing items that might float away as flows increase 
• Removing valuable items from basements or lower floors that could be subject to flooding
• Keeping emergency phone numbers handy
• Familiarizing yourself with your municipality’s Emergency Preparedness Plan

This watershed conditions statement is in effect until Friday, April 14, 2023 and may be updated at that time unless the forecast or conditions change.

-end-

More Information:
Contact: Brian Stratton, RVCA Manager Engineering Services
Rideau Valley Conservation Authority
613-692-6804, 1-800-267-3504 ext. 1141

www.rvca.ca/watershed-conditions

"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 specific watercourses or municipalities.

(WCS – R04/2023)

RIDEAU VALLEY, March 30, 2023 – A Flood Watch has been issued for the Rideau Valley as a rainy weekend mixes with the residual snowpack still intact in some areas after a cool March. Potential flooding could begin to impact low-lying areas as early as Saturday and continue throughout next week.

Since early March, we have experienced a very gradual snow melt with some precipitation across the Rideau Valley Watershed.  As such, snow remains in some parts of our watershed, most prominently in the City of Ottawa and the Tay River watershed, which indicates a potential for flooding in low-lying areas adjacent to any rivers, creeks or ditches.

The short-term weather forecast indicates rain amounts of 20-30 mm and mild temperatures on Saturday April 1, with cooler temperatures on Sunday. The longer-term forecast indicates milder temperatures throughout next week with potential rain. 

Based on the above forecast, water levels and flows are expected to increase in all waterways in the Rideau Valley Watershed, beginning on Saturday and continuing throughout next week. The degree of increase will depend on precipitation amounts and temperatures, and may result in flooding within the following areas:

• Smaller creeks and streams in the lower Rideau Valley Watershed, including in the City of Ottawa. This includes low-lying roads and waterfront properties adjacent to Stevens Creek and any connected creeks or ditches (near North Gower), and agricultural lands along Cranberry Creek.
• The Rideau River near Becketts Landing and Kemptville Creek, particularly the areas around Hilly Lane, Rideau Glen Lane, Golf Course Lane, and Barts Lane. Access concerns may arise for Cedar Beach Lane.
• The Rideau River near Kars, particularly the areas around Lorne Bridge Road and Rideau Street South.

With the elevated conditions, potential exists for further impacts if significant additional rain were to occur before the water levels and flows begin to recede.

Water levels in upper watershed lakes are presently near normal for this time of year. Parks Canada staff who manage water levels for the Rideau Canal will closely monitor these water levels and have indicated that the levels are expected to rise as the snowpack continues to melt. 

City of Ottawa crews have completed their annual ice removal program on the Rideau River between Rideau Falls and Bronson Avenue. 

With changing water levels expected over the coming days, ice cover on lakes, ditches, local streams and rivers will continue to be unstable. Extreme caution should be exercised when near local waterbodies. Parents should inform their children of the risks and provide appropriate supervision. 

As temperatures continue to rise, the potential for ice jams remains high in some local streams and rivers, as flows could quickly increase before the ice can melt. Residents are advised to monitor their local river closely for signs of ice jams as spring progresses. RVCA staff will be monitoring conditions but we always welcome unique observations from watershed residents. 

Flooding along roadways is also a concern due to current snow/ice buildup on roadside ditches.

Residents in flood-prone or low-lying areas that are historically susceptible to flooding should take the necessary precautions to protect their property, such as:

• Ensuring sump pump is clear, in good working condition and has a backwater valve 
• Ensuring easy access to a portable backup generator and pump
• Ensuring downspouts are clear and the outlet is at least 3 metres from the dwelling 
• Securing items that might float away as flows increase 
• Removing valuable items from basements or lower floors that could be subject to flooding
• Keeping emergency phone numbers handy
• Familiarizing yourself with your municipality’s Emergency Preparedness Plan

This watershed conditions statement is in effect until Tuesday, April 11, 2023 and may be updated at that time unless the forecast or conditions change.

- end - 

More Information:

Contact: Brian Stratton, RVCA Manager Engineering Services
Rideau Valley Conservation Authority
613-692-6804, 1-800-267-3504 ext. 1141

www.rvca.ca/watershed-conditions

"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 specific watercourses or municipalities.