Grand River

Streamflow Hydrology Weather


Grand River Levels

May 2 2024

78,989 ACRE-FT

Discharge Volume Today
-16383.88 cfs (-29.15%) since yesterday
136.43% of Normal 12 Streamgauges

Total streamflow across the Grand River was last observed at 39,823 cfs, and is expected to yield approximately 78,989 acre-ft of water today; about 136% of normal. River levels are high. Average streamflow for this time of year is 29,190 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 Near Sumner reporting a streamflow rate of 26,000 cfs. This is also the highest stage along the Grand River, with a gauge stage of 28.01 ft at this location. 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 2024-05-02
Streamflow 39,823.39 cfs
Percent of Normal 136.43%
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
0 cfs 0.10 ft 44.44
Grand R At Little Eagle Sd
USGS 06357800
213 cfs 3.6 ft -8.58
Grand River At Jackson
USGS 04109000
156 cfs 10.22 ft -2.5
Grand River Near Eaton Rapids
USGS 04111000
664 cfs 3.02 ft -3.91
Grand River At Lansing
USGS 04113000
1120 cfs 4.18 ft -5.88
Grand River Near Gallatin
USGS 06897500
3530 cfs 9.61 ft -6.12
Grand River At Portland
USGS 04114000
1320 cfs 6.54 ft -4.35
Grand River At Chillicothe
USGS 06899680
361 cfs 6.97 ft
Grand River Near Sumner
USGS 06902000
26000 cfs 28.01 ft -37.65
Grand River At Ionia
USGS 04116000
2210 cfs 10.93 ft -1.34
Grand River Near Painesville Oh
USGS 04212100
220 cfs 2.55 ft -9.47
Grand River At Grand Rapids
USGS 04119000
4390 cfs 4.71 ft -4.77

Peak Annual Discharge

Grand River Maximum Total Discharge

Seasonal Comparison

Grand River Year Over Year Discharge


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