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Flood Report - April 23, 2019

Posted: April 23, 2019

Flood Report for Manitoba
April 23, 2019

Flood Warning*:                - Red River, from Emerson to the Red River Floodway Channel Inlet

Summary
  • Water levels on the Red River in Manitoba upstream of Winnipeg continue to rise. The river is near crest at Emerson and is expected to stay near crest for a few days.
  • Partial ring dike closures are currently in place at Emerson and at St. Jean Baptiste. Both communities will remain accessible by road. Based on forecasted peak water levels, the following closures are anticipated:
  • Morris: PTH 75 North at Morris is expected to remain open; an earthen ramp and additional traffic control measures may be implemented April 26-28, if required.
  • Letellier: The dike opening for PR 201 at the southeast corner of Letellier may require a partial closure depending on the flood peak, if water levels rise high enough to trigger a dike closure the bridge on PR 201 over the Aux Marais River may also be closed.
  • St. Adolphe: An earthen berm may be constructed across PR 200 on the north side of St. Adolphe to maintain freeboard. If a dike closure is implemented, the highway will remain open with a minor traffic diversion.
Weather
  • There has been no significant precipitation in southern Manitoba or upstream jurisdictions and none is forecasted for the next few days.
  • Weather forecast models are indicating that, for this coming weekend, 10-20 mm of precipitation is expected to occur in the Red River basin. However, because that is 4-5 days away, the forecasted amounts and location of the precipitation may change in the coming days.
Red River Basin
  • Water levels on the Red River in Manitoba upstream of Winnipeg continue to rise. The river is near crest at Pembina, North Dakota and Emerson and is expected to stay near crest for a few days. The recorded water level rise in the last 24 hours was 0.3 feet at Emerson, 0.6 feet at Morris, and 0.6 feet at Ste. Agathe.
  • The river is above banks at many locations, including Emerson, Letellier, St. Jean Baptiste, Morris, and St. Adolphe. Natural Resources Canada produces up-to-date flood extent maps, which are available online at https://www.nrcan.gc.ca/hazards/floods. The satellite imagery used to produce these maps is captured on a three-day cycle. The next update is scheduled for today but, due to processing time, today’s imagery may not be available until tomorrow.
  • Forecasted peak water levels on the Red River were updated this morning, the latest forecast information and water level data is summarized below.

Today’s level (ft) Forecasted peak
Level (Ft) Date
Emerson 787.4 787.6 – 788.0 Apr 24-26
Letellier 782.4 783.0 - 783.3 Apr 24-26
St. Jean 774.1 777.4 - 778.2 Apr 25-27
Morris (@ PTH 23) 771.5 773.4 -774.6 Apr 26-28
Ste. Agathe 762.9 764.7 – 766.1 Apr 27-29
St. Adolphe 758.8 760.5 - 761.2 Apr 28-30
Above floodway inlet 755.5 757.5 – 758.0 Apr 28-30
James Avenue 17.2 18.1 - 18.3 Apr 28-30

Note: water levels at Emerson and Ste Agathe will differ from those posted on the Water Survey of Canada website because different vertical datums are in use. For conversion information please see the most recent flood sheet.
  • Partial ring dike closures are currently in place at Emerson (a local road at the north side of the West Lynne Dike, CN rail line at the border, and at Noyes), and at St. Jean Baptiste (on PR 246 at the east end of the community). Both communities will remain accessible by road. Over 300 super sandbags have been installed to provide necessary freeboard on the dike at Ste. Agathe.
  • Based on forecasted peak water levels, the following closures are anticipated:
  • Morris: PTH 75 North at Morris is expected to remain open; an earthen ramp and additional traffic control measures may be implemented April 26-28, if required.
  • Letellier: The dike opening for PR 201 at the southeast corner of Letellier may require a partial closure depending on the flood peak, if water levels rise high enough to trigger a dike closure the bridge on PR 201 over the Aux Marais River may also be closed.
  • St. Adolphe: An earthen berm may be constructed across PR 200 on the north side of St. Adolphe to maintain freeboard. If a dike closure is implemented, the highway will remain open with a minor traffic diversion.
  • A number of other dike openings for drains, railways, and local roads are being monitored and some further partial closures may be required.
  • Crews are also running pumping operations to facilitate internal drainage inside ring dike communities. Pumping operations are underway at Emerson, Letellier, Dominion City, St. Jean Baptiste, Morris, St. Adolphe, and Rosenort. As the water rises pumping operations are expected to be required at Riverside. Depending on water levels, pumping operations may be required at Brunkild and Aubigny. If pumping is required at Ste. Agathe, it will be undertaken by the RM of Ritchot.
  • The Red River Floodway is operating under Rule 1 to lower water levels in Winnipeg while keeping water levels at or slightly below natural upstream of the inlet control structure. Flow in the Floodway channel was 10,460 cfs (296 cms) this morning. Flows upstream of the Floodway Inlet this morning are approximately 54,500 cfs (1,543 cms).
  • Sections of PR 320 remain closed or limited to local traffic because of high water levels, debris on road and soft and muddy conditions. East of St. Jean Baptiste water has been reported on the edges of the roads Provincial Roads 217 & 246. A berm has been created to keep water off the roads. Motorists are advised to exercise caution; for detours and road closures please call 511 or visit www.manitoba511.ca.
Note: water levels at Emerson and Ste Agathe will differ from those posted on the Water Survey of Canada website because different vertical datums are in use. For conversion information please see the most recent flood sheet.
  • Partial ring dike closures are currently in place at Emerson (a local road at the north side of the West Lynne Dike, CN rail line at the border, and at Noyes), and at St. Jean Baptiste (on PR 246 at the east end of the community). Both communities will remain accessible by road. Over 300 super sandbags have been installed to provide necessary freeboard on the dike at Ste. Agathe.
  • Based on forecasted peak water levels, the following closures are anticipated:
  • Morris: PTH 75 North at Morris is expected to remain open; an earthen ramp and additional traffic control measures may be implemented April 26-28, if required.
  • Letellier: The dike opening for PR 201 at the southeast corner of Letellier may require a partial closure depending on the flood peak, if water levels rise high enough to trigger a dike closure the bridge on PR 201 over the Aux Marais River may also be closed.
  • St. Adolphe: An earthen berm may be constructed across PR 200 on the north side of St. Adolphe to maintain freeboard. If a dike closure is implemented, the highway will remain open with a minor traffic diversion.
  • A number of other dike openings for drains, railways, and local roads are being monitored and some further partial closures may be required.
  • Crews are also running pumping operations to facilitate internal drainage inside ring dike communities. Pumping operations are underway at Emerson, Letellier, Dominion City, St. Jean Baptiste, Morris, St. Adolphe, and Rosenort. As the water rises pumping operations are expected to be required at Riverside. Depending on water levels, pumping operations may be required at Brunkild and Aubigny. If pumping is required at Ste. Agathe, it will be undertaken by the RM of Ritchot.
  • The Red River Floodway is operating under Rule 1 to lower water levels in Winnipeg while keeping water levels at or slightly below natural upstream of the inlet control structure. Flow in the Floodway channel was 10,460 cfs (296 cms) this morning. Flows upstream of the Floodway Inlet this morning are approximately 54,500 cfs (1,543 cms).
  • Sections of PR 320 remain closed or limited to local traffic because of high water levels, debris on road and soft and muddy conditions. East of St. Jean Baptiste water has been reported on the edges of the roads Provincial Roads 217 & 246. A berm has been created to keep water off the roads. Motorists are advised to exercise caution; for detours and road closures please call 511 or visit www.manitoba511.ca.
Manitoba Lakes
  • Ice coverage on Manitoba’s major lakes remains largely unchanged, with 85% or higher on many lakes according to the most recent satellite imagery. However, observations from the field indicate a continued deterioration of ice strength on the lakes. Winds are generally moderate from the south for the next 24 hours, up to 35 km/hr, and the risk of ice pile-up is low.
  • Outflow from Lake Manitoba is approximately 3,320 cfs (94 cms) through the Fairford River Water Control Structure.
  • The water levels on Manitoba’s major lakes are relatively stable and within normal or desirable ranges. Today’s water levels are available on the Morning Conditions Report from the Manitoba Infrastructure website at the link available below. As current and forecasted lake levels are not expected to be an issue, today will be the last day with reporting on lake water levels. Reporting on ice conditions will continue until the risk of ice pile-up has passed.
Notes
  • All flow and water level information is based on data available at 7:00 am. Morning Conditions reports, with current water level data, are available on the department’s website this morning and flood sheets with updated forecast information will be posted later today at https://gov.mb.ca/mit/floodinfo/#forecasts_reports.
  • Any questions or concerns about flood mitigation should be directed first to the municipal authority (call the Municipal Office at 204-338-0306 or email info@weststpaul.com). Questions about forecasts, water levels, provincial waterways, or provincial water control infrastructure can be directed to 204-945-1165 or by email to floodinfo@gov.mb.ca.
  • For detours and road closures please call 511 or visit www.manitoba511.ca.
*Definitions
Flood Warning: A flood warning is issued when river or lake levels are exceeding or are expected to be
exceeding flood stage within the next 24 hours.
Flood Watch: A flood watch is issued when river or lake levels are approaching and likely to reach flood stage, but likely not within the next 24 hours.
High Water Advisory: A high water advisory is issued when a heavy storm or high flows are expected and may cause water levels to rise, but not necessarily reach flood stage. A high water advisory can be an early indicator for conditions that may develop into a flood watch or flood warning.

Hydrologic Forecasting & Water Management
Water Management & Structures Division
Manitoba Infrastructure