RIVER GAUGE · FLAT RIVER
Flat River at Smyrna
Ionia County, Michigan
Water level3.38 ft
Flow212 cfs
Last readingSep 16, 2026, 4:00 PM UTC (last recorded)
Action5.5 ft1,720 cfs
Minor flood8.5 ft
Moderate flood9.5 ft
Major flood10.5 ft
The past week
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What floods at each level
- 9.05 ft
Expect major flooding of campground sites and evacuation of campers in Double R Ranch Campground during the camping season. Approximately a dozen homes have water in their basements.
- 8.5 ft
Flooding begins to impact homes and flood basements in low lying areas along the river.
- 7 ft
Expect minor flooding of about 30 Double R Ranch Campground sites and in low lying areas adjacent to the river.
- 6 ft
Expect minor flooding of low lying areas adjacent to the river and Double R Ranch Campground.
- 5.5 ft
River is bankfull. Overflow begins in low areas adjacent to the river.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Sep 12, 1986 | 9.05 ft | 4,700 cfs |
| Jan 21, 2005 | 8.5 ft | — |
| Dec 21, 2000 | 7.84 ft | — |
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