River gauges›Iowa
RIVER GAUGE · ROCK RIVER

Rock River at Rock Rapids

Lyon County, Iowa

Water level6.86 ft
Flow40 cfs
Last readingSep 16, 2026, 5:15 PM UTC (last recorded)
Action11 ft
Minor flood13 ft
Moderate flood16 ft
Major flood19 ft

The past week

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What floods at each level

Highest crests on record

DateLevelFlow
Jun 21, 202428.65 ft44,000 cfs
Jun 16, 201426.98 ft33,800 cfs
Sep 24, 201022.25 ft18,200 cfs

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