Grand River

Streamflow Hydrology Weather


Grand River Levels

April 16 2024

37,972 ACRE-FT

Discharge Volume Today
-2142.0 cfs (-10.06%) since yesterday
71.14% of normal Low

Total streamflow across the Grand River was last observed at 19,144 cfs, and is expected to yield approximately 37,972 acre-ft of water today; about 71% of normal. Average streamflow for this time of year is 26,912 cfs, with recent peaks last observed on 2017-04-07 when daily discharge volume was observed at 240,121 cfs.

Maximum discharge along the river is currently at the Grand River At Grand Rapids reporting a streamflow rate of 6,160 cfs. However, the streamgauge with the highest stage along the river is the Grand River At Ionia with a gauge stage of 13 ft. This river is monitored from 12 different streamgauging stations along the Grand River, the highest being situated at an altitude of 10,170 ft, the Grand River Ditch At La Poudre Pass.

Last Updated 2024-04-16
Streamflow 19,144.0 cfs
Percent of Normal 71.14%
Maximum 240,121.0 cfs
2017-04-07

About the grand river


The Grand River is a 300-kilometer long river that runs through southern Ontario, Canada. It was an important waterway for Indigenous peoples and European explorers and was later used for transportation and industry. The river originates in the highlands of Dufferin County and flows into Lake Erie at Port Maitland. The river’s hydrology is affected by numerous tributaries and reservoirs, including the Conestogo, Speed, and Eramosa rivers, and the Elora and Guelph Lake reservoirs. There are also several dams along the river, including the Shand Dam and the Guelph Lake Dam. The Grand River is used for water supply, flood control, and hydroelectric power generation. It is also a popular destination for recreational activities such as fishing, boating, and camping. The river is also home to several agricultural operations, including dairy farms and crop production.

Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Grand River Ditch At La Poudre Pass
USGS 09010000
-999 cfs 0.12 ft None
Grand R At Little Eagle Sd
USGS 06357800
129 cfs 3.22 ft -14.57
Grand River At Jackson
USGS 04109000
197 cfs 10.67 ft 0
Grand River Near Eaton Rapids
USGS 04111000
880 cfs 3.5 ft -10.11
Grand River At Lansing
USGS 04113000
1780 cfs 5.47 ft -12.75
Grand River Near Gallatin
USGS 06897500
186 cfs 3.68 ft 0
Grand River At Portland
USGS 04114000
2170 cfs 7.43 ft -11.43
Grand River At Chillicothe
USGS 06899680
361 cfs 6.97 ft
Grand River Near Sumner
USGS 06902000
632 cfs 7.29 ft -6.09
Grand River At Ionia
USGS 04116000
3610 cfs 13 ft -7.44
Grand River Near Painesville Oh
USGS 04212100
3400 cfs 5.98 ft -22.37
Grand River At Grand Rapids
USGS 04119000
6160 cfs 6.59 ft -2.69

Peak Annual Discharge

Grand River Maximum Total Discharge

Seasonal Comparison

Grand River Year Over Year Discharge


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