GRCA - River Data - River flows

	Flow summary
	WSC gauge summary
	Upper Grand
	Central Grand
	Central Lower Grand
	Lower Grand
	Conestogo River
	Canagagigue Creek
	Laurel Creek
	Mill Creek
	Nith River
	Speed River
	Whitemans Creek
	McKenzie Creek

	Flow summary
	Rainfall
	Air temperature
	Wind speed
	Barometric pressure
	Reservoir levels
	Flow augmentation
	Hydro production
	Lake Erie level
	Water quality
	River safety
	Data Terms of Use

Conestogo River

GRCA monitoring network - Conestogo River

Caution: Data is provisional. For more information read our Data Terms of Use

Conestogo River

Interpreting the lines

The numbers on the left of the graph will change depending on the flows in the last seven days. Here are some significant flow rates to help you interpret current conditions.

Learn how ice jams can cause sudden changes in the flow rates and lead to flooding.

Gauge	Community	Flow	Significance
Above Drayton	Drayton	0.2	Normal summer low flow
& Drayton		125	Water at river banks, flooding in low-lying areas
		200	Flooding starts
		290	Behind homes on Wood St.
		370	Crosses Wood St.
		388	1974 flood
		450	Crosses Main St.

Glen Allan	Glen Allan	3	Normal summer low flow
		50	Water at river banks, flooding in low-lying areas

St. Jacobs	St. Jacobs	4	Normal summer low flow
		35	Flooding of low-level bridge on Twp. Rd. 21
		150	Water at river banks, flooding in low-lying areas
		595	1974 flood

How to read this graph

This graph contains information on flows in the Grand River during the last week at various gauge locations. The graph is automatically updated every hour.

Along the bottom (x axis) are the days the data was recorded. The vertical line above the date represents midnight.

Along the left (y axis) is the river flow measured in cubic metres per second (m3/s). That shows the amount of water passing by the gauge at that time. A cubic metre is 1,000 litres of water so a flow of 10 m3/s would represent 10,000 litres of water per second.

Please note: A number of factors will influence the accuracy of the data including:

backwater from ice, weeds or debris,
malfunctioning equipment and/or routine maintenance of equipment may cause data spikes, and
sediment accumulation which may plug the gauge intake.

For more information read our Data Terms of Use

Location of Flow Gauges in the Conestogo River Watershed

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.