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URGENT: GRAND RIVER CONSERVATION AUTHORITY Flood Message #6

FLOOD WARNING UPDATED FOR

ENTIRE GRAND RIVER WATERSHED

 

Grand River Conservation Authority

GRCA NEWS

February 21, 2018 @ 1:00 p.m.

Release on receipt

 

Flood Message #6 – Flood Warning updated for entire Grand River watershed

 

The weather system that moved into the Grand River watershed on Monday continues to significantly impact a number of communities throughout the watershed. While rainfall has generally stopped and temperatures are beginning to decrease, many areas in the southern Grand River watershed will continue to experience major flooding from this event.

 

Flood Warning

 

  • City of Cambridge: An ice jam upstream of Parkhill Dam released at approximately 2:00 am Wednesday morning. When this ice jam released it sent a surge of water downstream. The peak flow at the Galt stream gauge (located downstream of Concession Street) in Cambridge reached 1,100 m3/s and receded quickly. This resulted in flooding in the reach of Grand River between Cambridge and Brantford similar to flood levels experienced in June of 2017. Flows in the Grand River through Cambridge will remain high for the next week. Flood coordinators are asked to monitor conditions along the Speed River and plan to reopen Blackbridge Road on Wednesday afternoon.

 

  • Township of Wilmot – New Hamburg: Warnings remain in place for residents up to the Level 3 flood zone in the community of New Hamburg. Flows will remain elevated throughout the day on Wednesday before beginning to recede overnight Wednesday into Thursday.

 

  • Township of North Dumfries – Ayr: The flood coordinators for North Dumfries Township have been asked to warn residents in the Level 4 flood zone and monitor conditions. Flows are beginning to impact flood zones this afternoon and will remain high overnight Wednesday into Thursday morning.

 

  • Brant County: The flood coordinators for Brant County are asked to continue to monitor conditions along the Grand River as flows will remain high through the remainder of the week.

 

  • City of Brantford: A number of ice jams have developed in the Grand River in the City of Brantford. These ice jams continue to impact water levels resulting in the flooding of a number of areas within the city. Ice jams through this reach are beginning to erode and move downstream however levels will remain high through the remainder of the week. City of Brantford flood coordinators and emergency officials continue to manage the emergency response during this event. Residents should follow the direction of municipal staff and stay away from all waterways due to the extreme safety risk at this time.

 

  • Six Nations/Haldimand County – Caledonia: The Grand River through Six Nations and Caledonia in Haldimand County is beginning to see an increase in flows in response to runoff throughout the watershed. Ice jams currently in place in Brantford may release, resulting in a surge of water that will move downstream and rapidly increase flows in the area. Six Nations and Haldimand County flood coordinators should closely monitor conditions along the Grand River and warn residents of the potential risk.

 

  • Haldimand County – Cayuga: An ice jam remains in place in Cayuga. Haldimand County flood coordinators are asked to warn residents in the floodplain in the Town of Cayuga in preparation for the potential of significant flooding as a result of upstream ice jams. These jams may release suddenly and without warning, sending a surge of water downstream.

 

  • Town of Dunnville/Port Maitland: Canadian Coast Guard icebreaking operations have finished and successfully broken up much of the ice in the mouth of the Grand River. This will help reduce the potential for ice jams at this location. Flood coordinators should warn residents in the floodplain of the potential risk of sudden increases in water levels as a result of upstream conditions and monitor for the possibility of ice jams forming in or downstream of Dunnville.

 

  • Township of Puslinch/Wellington County: Puslinch and Wellington County Flood Coordinators should monitor conditions along the Eramosa River. An ice jam has formed at Cooks Mill Road and is causing water to impact properties in the area.

 

  • Town of Grand Valley / Waldemar: Flows have peaked in Grand Valley and have begun to recede, but will remain high through the remainder of the week. Flood coordinators should continue to monitor conditions due to the potential presence of ice in the river.

 

  • Township of Mapleton/Drayton: Flows have peaked in Drayton and have begun to recede, but will remain high through the remainder of the week. Flood coordinators should continue to monitor conditions due to the potential presence of ice in the river.

 

  • Township of Woolwich / St. Jacobs / West Montrose: Flood coordinators in Woolwich Township are asked to monitor conditions and maintain the closure of Three Bridges road. Flows will remain high through the remainder of the week.

 

Stay Safe

 

The public is reminded to exercise extreme caution around all water bodies. Banks adjacent to rivers and creeks are very slippery at this time and, when combined with current weather conditions, pose a serious hazard. Parents are encouraged to keep their children and pets away from all watercourses and off frozen water bodies, which will be extremely unsafe as a result of the warming trend.

 

This message will remain in effect until 3:00 p.m. on Thursday, February 22, 2018.  Updated flood messages will be issued as conditions develop and better forecast information becomes available.

 

More information

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Further information:

 

Cam Linwood, GRCA Communications Coordinator

Phone 519-621-2763 x2251  |  Cell 519-239-0890  |  Email clinwood@grandriver.ca

Lisa Stocco, GRCA Manager of Communications
Phone 519-621-2763 x2316  |  Cell 226-755-3414  |  Email lstocco@grandriver.ca

 

director

February 21st, 2018

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