Latest Statement From Mississippi Valley Conservation Authority
The Mississippi Valley Conservation Authority says that the Mississippi River watershed received significant rainfall over the weekend. Gauges in the upper watershed recorded between 80 and 105 mm while 50-90 mm were recorded in the lower watershed. As a result, flows have increased significantly and ice stability has been compromised across the watershed. Flows are expected to peak in 24-48 hours.
Since the Crotch Lake reservoir is at capacity, there is no storage available to reduce flows downstream. This has caused Dalhousie Lake to rise 30 cm and an additional 20-30 cm increase is still expected. To mitigate flooding on Dalhousie Lake, upper watershed dams are not being operated at this time.
The authority says at this time, there is a risk of ice jams or frazil ice increasing river levels. Air temperatures below -8°C can result in frazil ice formations in open flowing water. Similarly, high flows can dislodge ice sheets creating jams. Both can cause water levels to rise quickly, without warning. Residents are advised to maintain a close watch on levels and flows and take the necessary precautions to protect their property.
Ice thickness can change drastically due to high flows. The shoreline adjacent to lakes, rivers and creeks is very slippery and poses a serious hazard
The authority reminds the public to exercise extreme caution around all water bodies.
This message will be in effect until Monday January 20, unless conditions change.
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