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Iowa River at Iowa City, IA (IOWI4)


Data Type




Inundation Levels
NAVD88 Stage

651.2* 34.0*
650.7* 33.5*
650.2* 33.0*
649.7* 32.5*
649.2* 32.0*
Record Crest: 31.53 ft
648.7 31.5
648.2 31.0
647.7 30.5
647.2 30.0
646.7 29.5
646.2 29.0
645.7 28.5
645.2 28.0
644.7 27.5
644.2 27.0
643.7 26.5
643.2 26.0
642.7 25.5
642.2 25.0

Major Flooding Begins

641.7 24.5
641.2 24.0
640.7 23.5
640.2 23.0

Moderate Flooding Begins

639.7 22.5
639.2 22.0

Minor Flooding Begins

638.7 21.5
638.2 21.0

Near Flooding Begins

637.7 20.5
637.2 20.0
636.7 19.5
636.2 19.0
635.7 18.5
635.2 18.0
634.7 17.5
634.2 17.0
* = Extended rating
Weather Forecast Office Quad Cities, IA North Central River Forecast Center

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Current Stage:
13.6 ft at 04/19/2014 17:00:00 UTC
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Inundation Legend Inundation Legend
USGS Gauge Location Gauge Location

Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

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Flood Categories (in feet)
Major Flood Stage:25
Moderate Flood Stage:23
Flood Stage:22
Action Stage:21

Historical Crests
(1) 31.53 ft on 06/15/2008
(2) 28.52 ft on 08/10/1993
(3) 24.10 ft on 06/01/1851
(4) 23.35 ft on 06/13/1991
(5) 22.44 ft on 06/09/1974
(6) 22.04 ft on 05/01/1973
(7) 21.64 ft on 03/29/1979
(8) 21.50 ft on 03/04/1985
(9) 21.50 ft on 04/09/1975
(10) 21.44 ft on 06/15/1982
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Low Water Records
Currently none available.

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Site-specific information:
These inundation maps for the Iowa River at Iowa City were developed by the Iowa Flood Center, and made available on this site through funding by the City of Iowa City.

Extended rating:
Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.

Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
29 Serious flood damage occurs at the University of Iowa campus.
27 Flood protection becomes necessary at the University of Iowa. Water affects several industrial businesses and warehouses along Commercial Drive.
26 Water floods county road bridge approaches along the river and affects streets and parking lots along Commercial Drive.
25 Flooding occurs in Coralville. Water inundates the Cedar Rapids and Iowa City Rail line near Coralville.
23.5 Water affects the north Wastewater Treatment Plant. Considerable flooding occurs at the University of Iowa.
23 Water floods Hancher Auditorium at the University of Iowa. Flooding problems occur elsewhere on the University of Iowa campus.
22 Urban flood damage occurs in Iowa City. Water enters homes along Edgewater Drive.
21 Flooding occurs in homes near Taft Speedway in Iowa City. Homes on east side of Quarry Road in Coralville require protection. Edgewater Drive becomes impassable.
20.5 Water affects the north Wastewater Treatment Plant.
19 Lowland flooding occurs in the Iowa City Park area.
18 Rural flooding occurs along the river.
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Iowa City Inundation Maps developed in partnership with the Iowa Flood Center
Iowa City Inundation Maps funded by the City of Iowa City
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Page last modified: 29-Mar-2014 4:34 AM
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.