Central Grand flows | Grand River Conservation Authority

Learn how to read these charts on our River and stream flows page.
Many timeseries can be downloaded from our Data Downloads page.

Critical Flows

**Critical flows table:** This chart will help you understand the significance of various flows levels. The chart shows the name of the gauge, the affected communities and various flow levels along with the significance of that flow level. Flows are measured in cubic metres per second, i.e. the amount of water flowing past a spot in one second.
Gauge (Community)	Flow (m³/s)	Significance
West Montrose	5	Normal summer low flow
	125	Campground floods
	Up to 180	Warning Zone 1
	180 - 280	Warning Zone 2; village floods
	280 - 400	Warning Zone 3
	670	1974 flood
	400 - 700	Warning Zone 4
	700 - 1400	Warning Zone 5
Bridgeport	11	Normal summer low flow
	265	Water at banks; low-lying areas flooded
	1,300	1974 flood
	1,700	Dike capacity
Victoria St (Kitchener)	265	Water at banks; low-lying areas flooded
Beaverdale (Cambridge)		See Speed & Eramosa River chart
St. Jacobs		See Conestogo River chart
Doon (Kitchener)	11	Normal summer low flow
	320	Water at banks; low-lying areas flooded
	1,420	1974 flood
Galt (Cambridge)	15	Normal summer low flow
	400	Water at banks; low-lying areas flooded
	638	Water St. closed south of Ainslie
	1,050	Concession St. bridge closed
	1,472	Main St. bridge closed
	1,550	1974 flood
	1,628	Parkhill St. bridge closed
	2,352	Dike capacity

Location of flow gauges in the Central Grand River area

Provisional Data

Caution: Users of the GRCA's real-time data are cautioned to consider the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business.

The Grand River Conservation Authority assumes no responsibility for the correctness of the information contained in this website nor liability to any user of such information, regardless of the purpose.

Warning! River levels and flows can change rapidly.