News Releases
IJC and board news releases include information about outflows and expected conditions, ice boom installation and removal, new publications, and other up-to-date information about the IJC and its boards.
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Osoyoos Lake levels are being maintained at a higher-than-normal level for this time of the year in anticipation of lower spring runoff due to lower-than-normal snowpacks. As of April 9, the Osoyoos Lake elevation is 911.81 feet (277.92 meters) and is at the historical maximum for the 1987-2023...
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The International Lake Ontario-St. Lawrence River Board is providing this notice to summarize the water level conditions as winter approaches. As a reminder, Plan 2014 is a set of rules that govern Lake Ontario outflows through the Moses-Saunders Dam located between Massena, New York and Cornwall...
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As of November 1, 2023, the Rule Curve for maximum and minimum Osoyoos Lake levels has changed for the winter period, allowing lake levels to be maintained between 909.0 feet and 911.5 feet until March 1, 2024 (Figure 1). Figure 1: 2023 Osoyoos Lake Levels (bright green) and allowable range under...
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The International Lake Ontario-St. Lawrence River Board is providing this notice to summarize the water level conditions from September 2023 through the remainder of Autumn.
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The International Lake Ontario-St. Lawrence River Board has been using its authority to deviate from Plan 2014 since September 2nd to provide higher and more predictable water levels on Lake St. Lawrence and the upper St. Lawrence River. Dry weather conditions have caused water levels on Lake...
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Those interested in water levels, Zosel Dam operations and other projects and initiatives by the International Osoyoos Lake Board of Control are invited to attend a public meeting in Osoyoos, British Columbia, on October 4, 2023. The event is from 6:30-8 p.m. (PDT) at the Sonora Community Centre...
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The International Lake Ontario-St. Lawrence River Board will use its authority to deviate from Plan 2014 from September 2nd through October 9 to provide higher and more predictable water levels on Lake St. Lawrence and the upper St. Lawrence River.
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The International Lake Ontario–St. Lawrence River Board and International Niagara Board of Control will host two virtual public meetings, one in English and one in French, to share the most up to date forecast for the Lake Ontario and St. Lawrence River basin and discuss ice boom installation for...
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The spring freshet in the Okanagan/Okanogan and Similkameen basins has come to an early end as snowpacks have been depleted and levels on both Okanagan and Osoyoos lakes have peaked and begun to decrease. Osoyoos Lake peaked at 912.10 feet (278.01 meters) on May 8 in response to runoff within the...
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Lake Ontario water levels are approaching the seasonal peak. Outflow into the St. Lawrence River is gradually increasing, as Ottawa River flows gradually decrease.
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The spring freshet in the Okanagan/Okanogan and Similkameen basins has commenced as snowpacks have begun to melt due to above normal temperatures in the last week. The snow pillow gauge at Mission Creek (elevation 1,780 meters or 5,840 feet) in the Okanagan basin was above normal for this time of...
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A wet weather system has remained over the Lake Ontario-St. Lawrence River basin for several days. The persistent rain and runoff from the system continues to cause water levels in Lake Ontario and the St. Lawrence River to rise.
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Heavy rain in recent days across the Lake Ontario-St. Lawrence River basin has led to rapid increases in Ottawa River flows and rising Lake Ontario water levels. Continued wet weather and runoff from the recent rains may result in flooding of vulnerable areas along the Lake Ontario shoreline as well...
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If you’re interested in activities by the International Osoyoos Lake Board of Control, it’s now easy to receive news releases in your email inbox. The Board has launched a new feature which enables people to sign up to receive periodic email notifications on news related to Board activities. The...
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The International Lake Ontario – St. Lawrence River Board (Board) is seeking your input. The Board would like to collect information specifically related to the reduced outflows from Lake Ontario October 7 through October 10, 2022 to support boat haul out and learn more about where people access the...
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Climatological conditions within the Okanagan/Okanogan and Similkameen River basins varied during 2022, with the greatest impacts related to a cool spring leading to delayed snowmelt and a delayed freshest peak at Osoyoos Lake. While near-normal temperatures prevailed at the start of 2022...
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Osoyoos Lake Board of Control public meeting: Wednesday, October 26, 2022, 6:30-8 p.m. (PDT) The International Osoyoos Lake Board of Control is holding its annual public meeting at the Oroville High School in Oroville, Washington, at 6:30 p.m. (PDT) on October 26. There also will be an option to...
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The International Lake Ontario-St. Lawrence River Board will temporarily reduce outflows from Lake Ontario at the Moses Saunders Dam from noon on Friday, October 7th through noon on Monday, October 10th to reach a target water level of about 73.10 meters (239.83 ft.) on Lake St. Lawrence at Long...
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Due to Lake Ontario water levels decreasing and falling below the Criterion H14 threshold this week, the International Lake Ontario – St. Lawrence River Board now has the authority to implement deviations from plan-prescribed flows beginning September 24.
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The International Lake Ontario-St. Lawrence River Board plans to temporarily reduce outflows from Lake Ontario to increase water levels on Lake St. Lawrence the second weekend of October. These efforts will provide marinas and shoreline dock owners an opportunity at the end of the season to remove...
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The three Great Lakes Boards will host joint webinars in English and French on August 30 and 31, respectively from 5:30 to 6:30 pm EDT. Information shared will include current and forecast conditions within the Great Lakes basin.
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Regulation of Osoyoos Lake by the Zosel Dam has resumed now that Osoyoos Lake levels have returned to within the rule curve. On July 27, the Osoyoos Lake level declined below an elevation of 912 feet (277.97 meters), the upper limit of the rule curve as defined by Condition 7 of the International...
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The level of Osoyoos Lake reached 913 feet (278.3 meters) on June 23 in response to runoff within the Okanagan/Okanogan and Similkameen basins during the spring freshet (Figure 1). At this elevation of Osoyoos Lake, some beaches along the shoreline are inundated and wind or boat-generated waves may...
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The spring freshet in the Okanagan/Okanogan and Similkameen basins has started, but unseasonably cold temperatures this spring have limited snowmelt and runoff. High-elevation snow pillow gauges at Blackwall Peak in the Similkameen Basin (at an elevation of 1,940 meters or 6,365 feet) and Mission...
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The International Lake Ontario – St. Lawrence River Board will host two virtual public meetings, one in English and one in French, to review winter and early spring conditions, and share the most up to date forecast for the Lake Ontario and St. Lawrence River basin. These meetings are essential to...
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Ice has formed in the critical sections of the St. Lawrence River in the Beauharnois Canal and on Lake St. Lawrence. As ice conditions stabilize, outflows from Lake Ontario will be increased in accordance with the rules of the plan.
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After slowly declining since late July following a dry summer, Osoyoos Lake level reached the targeted winter operational elevation of between 909.45 to 909.55 feet in early December according to the Washington State Department of Ecology, which owns and operates Zosel Dam. Lake level is anticipated...
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Currently the regulation plan is prescribing very high outflows, the third highest on record for this time in December, and these plan flows are higher than in December 2020. The regulation plan will continue to prescribe high outflows over the winter.
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The International Lake Ontario – St. Lawrence River Board (Board) is seeking your input. The Board would like to collect information specifically related to the reduced outflows from Lake Ontario October 8 through October 11 to support boat haul out and learn more about where people access the water...
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On November 15th, discharge of the Similkameen River began to increase rapidly. This was due in part to the landfall of a Category 5 atmospheric river causing heavy, sustained rainfall and rising temperatures resulting in additional runoff from snowmelt. A flood warning for the Similkameen River was...
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Lake Ontario outflows will be increased by 200 m3/s (7,100 cfs) above the amount set by Plan 2014, beginning October 16. This will continue for approximately eight weeks to return water levels in Lake Ontario to the level it would be had outflow deviations not been required earlier this year.
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The water level on Lake St. Lawrence at Long Sault Dam on Wednesday morning, October 6th was approximately 72.86 meters (239.04 ft.). The International Lake Ontario-St. Lawrence River Board will temporarily reduce outflows from Lake Ontario from noon on Friday, October 8th through noon on Monday...
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The current water level on Lake St. Lawrence at Long Sault Dam is approximately 73 meters (239.50 ft.). The International Lake Ontario-St. Lawrence River Board will temporarily reduce outflows from Lake Ontario to increase water levels on Lake St. Lawrence the second weekend of October.
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There are approximately 700 marina and boat club slips, and hundreds of private docks located along the shores of Lake St. Lawrence. Recreational boaters who navigate the St. Lawrence River, Lake St. Lawrence, and adjacent rivers and lakes have experienced high and low water level conditions that...
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(In French only) - Les conseils de régularisation des eaux des Grands Lacs de la Commission mixte internationale (CMI) vous invitent à assister à un webinaire prévu le mercredi 8 septembre de 12 h à 13 h (HAE). La séance se déroulera en français. Le Conseil international de contrôle du lac Supérieur...
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The International Osoyoos Lake Board of Control is holding its annual public meeting regarding the regulation of Osoyoos Lake water levels and the related operations of Zosel Dam by the State of Washington under the International Joint Commission’s Orders of Approval.
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The International Joint Commission (IJC) Great Lakes water levels boards invite you to attend a webinar scheduled for Friday, August 27 from 12:00 pm to 1:00 pm (EDT).
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Precipitation in the recent two weeks has had a positive impact and the wetter conditions have increased Lake Ontario water levels by approximately 7 cm (2.8 in). Normally, Lake Ontario water levels typically have begun the seasonal decline by this time of year.
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Osoyoos Lake level reached the summer target elevation of 911.70 feet in late May, then crested to 911.82 feet (277.923 m) on June 15, below the maximum allowable International Joint Commission (IJC) Order of Approval rule curve of 912.0 feet.
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The drought conditions that have impacted the Great Lakes-St. Lawrence River watershed this spring have continued to persist into the summer.
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The month of May has been drier than average in the Great Lakes-St. Lawrence River watershed. Based on data from the GLERL Hydromet database and US Army Corps of Engineers data, the most recent 12 months over Lake Ontario have been the driest since 1966. The Canadian and United States drought...
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The International Lake Ontario – St. Lawrence River Board will host several binational virtual public meetings to discuss the current conditions on Lake Ontario and the St. Lawrence River. We have been hearing from concerned property owners, business owners, and recreational users regarding the...
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The spring freshet in the Okanagan/Okanogan and Similkameen basins has begun as temperatures increase. The snow pillow gauges at Blackwall Peak in the Similkameen Basin (elevation 1,940 m) and Mission Creek in the Okanagan Basin (elevation 1,780 m) are near their annual peak and are both currently...
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Lower than average precipitation and winter snowpack runoff have resulted in decreased inflows to Lake Ontario. The reduced inflows have resulted in lower water levels on Lake Ontario and the St. Lawrence River. In response to these conditions, the Board has decided to reduce outflows from Lake...
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The risk of flooding on Lake Ontario and the upper St. Lawrence River has declined from moderate in December 2020 to low. In December, the risk analysis indicated a 28% chance of water levels exceeding a threshold at which damages occur in many shoreline communities. The risk is now down to 8%...
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The International Lake Ontario - St. Lawrence Board is optimistic that weather conditions the rest of this winter and spring won’t cause a damaging rise in Lake Ontario levels this year. However, it has been acting proactively since 1 January to reduce lake levels this winter just in case the...
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The International Joint Commission (IJC) has approved the Board’s request for authority to deviate from Plan 2014, and as conditions permit, outflows from the Moses-Saunders dam on the St. Lawrence River can be increased to exceed Plan 2014 flows. The risk of high water on Lake Ontario in 2021 is...
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The International Osoyoos Lake Board of Control is holding its annual public meeting regarding the regulation of Osoyoos Lake water levels and the related operations of Zosel Dam by the State of Washington under the International Joint Commission’s Orders of Approval.
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The Board will temporarily decrease outflows over the second weekend of October to raise Lake St. Lawrence levels significantly and provide a brief, final opportunity for residents of Lake St. Lawrence to remove their boats and other equipment prior to winter. Last week, the Board agreed to let Lake...
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Video of July 2020 Tri-Board Webinar on Great Lakes Water Levels and Answers to Additional Questions
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A public Great Lakes water levels webinar hosted by the International Joint Commission's Lake Superior Board of Control, Lake Ontario-St. Lawrence River Board and Niagara Board of Control was held July 17. This webinar provided an overview of why the Great Lakes were at their current levels and how...
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