Flood Message #9: More Rain Keeps Flows High; Reservoir Discharges Increased

By: KwNow! Local News
| Published 04/15/2014


Flood Message 9: High Water Expected

Unstable Weather Requires Extra Precautions

Portions of the Grand River watershed in the Arthur and Belwood areas received an additional 15 to 20 mm of rainfall late Sunday afternoon. This caused additional inflows into Shand and Conestogo Dams.

Discharge from Conestogo Dam was increased Sunday evening and discharge from Shand Dam was increased early Monday morning.

GRCA reservoirs have reached their capacity. Discharges have been increased and will remain high for several days in the Grand, Conestogo and Speed Rivers to restore storage for future rainfall.

Light rain is in the forecast today (Monday). Temperatures will begin to cool down quickly Monday afternoon into the evening. Precipitation will turn to freezing rain and snow by midnight.

GRCA staff will continue to closely monitor weather conditions and provide updates to this flood message based on observed and forecast weather conditions. This message is in effect until noon on Tuesday, April 15, 2014 at which time it will be updated.

GRCA is in regular contact with Flood Coordinators in the affected communities and will update them as required.

The GRCA is extending the Flood Warning issued on April 13 for the Grand, Conestogo and Speed Rivers. The Flood Watch for other portions of the watershed remains in effect.

Flood Warning (Action) for the Grand, Conestogo and Speed Rivers

Grand River

Flooding will continue in the Grand River in Waterloo Region through Monday.

Action: Regional Police and Flood Coordinators for West Montrose in Woolwich Township are asked to maintain flood warnings and continue to communicate with residents in West Montrose as required. Flows will remain high for the next few days.

Action: Regional Police and Flood Coordinators for the City of Cambridge are asked to monitor Water Street (Hwy 24) south of Concession Street. This section of road may flood early this evening and officials should be ready to close this road. Flows should peak in Cambridge-Galt at about midnight.

Flows are expected to remain high through the southern Grand River.

Action: Maintain closure of Gilkison Street in Brantford. Flows are expected to peak at about 6 a.m. on Tuesday.

Action: Flood coordinators in Brant County and Six Nations are asked to close Six Nations 4th Line and Bateman Line.

Action: The flood coordinator for Haldimand County is asked to maintain surveillance for possible closure of Grand Sports Driv,e south of York. Flows are expected to peak in Caledonia at about 6 p.m. Tuesday, Cayuga at 2 a.m. Wednesday and Dunnville at 9 a.m. on Wednesday.

Conestogo River

Action: The flood coordinator for Woolwich Township is asked to maintain closure of the low level bridge on Three Bridges Road and the Glasgow Street bridge until further notice.

Speed River

Action: The GRCA is asking City of Cambridge Public Works to maintain closure of Black Bridge and the walking trail under Highway 401 until further notice.

Flood Watch for the Grand, Conestogo, Nith and Speed Rivers

The flood watch message issued on April 13 has been extended.

There remains a lot of water in the system; soils are still frozen or saturated. The potential for flooding remains high particularly as a result of rainfall.

Flooding will persist in low-lying areas along the Grand, Conestogo, Nith and Speed rivers as the spring runoff continues.

Safety Message

Banks adjacent to rivers and creeks are slippery and when combined with cold, fast-moving water pose a serious hazard. Parents are encouraged to keep their children and pets away from water courses and off any remaining frozen water bodies. Recreational users of the river should be aware of the hazardous conditions at this time.