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Cedar River at Waterloo, IA (ALOI4)

Data Type




Inundation Levels
NAVD88 Stage

855.1*31.0*
853.6*29.5*
852.6*28.5*
851.627.5
Record Crest: 27.01 ft
851.127.0
850.126.0
849.125.0
848.624.5
847.623.5
847.123.0
846.122.0
845.621.5
Major Flooding Begins

844.620.5
844.120.0
843.619.5
Moderate Flooding Begins

842.618.5
842.118.0
841.117.0
840.616.5
839.615.5
839.115.0
838.614.5
837.613.5
Minor Flooding Begins

837.113.0
836.612.5
836.112.0
835.611.5
835.111.0
834.610.5
834.110.0
833.19.0
Near Flooding Begins

832.68.5
832.18.0
Below Flooding Begins

* = Extended rating
Weather Forecast Office Des Moines, IA North Central River Forecast Center
Hydrograph River at a Glance Download Inundation
Mapping
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Click on mapped inundation to see water depth values for that location, or hold shift and drag to zoom to area.

Current Stage:
5.8 ft at 09/26/2021 21:00:00 UTC
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Inundation Legend
Depth in feet
USGS Gauge Location Gauge Location
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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.

Gauge Information Collapse

Map Overlays
Flood Categories (in feet)
Major Flood Stage: 21
Moderate Flood Stage: 19
Flood Stage: 13
Action Stage: 8.5
Low Stage (in feet): -9999

Historic Crests
(1) 27.01 ft on 06/11/2008
(2) 22.95 ft on 09/24/2016
(3) 21.86 ft on 03/29/1961
(4) 21.67 ft on 04/08/1965
(5) 20.78 ft on 07/23/1999
(6) 20.60 ft on 04/02/1993
(7) 20.15 ft on 06/29/1969
(8) 20.09 ft on 07/02/1969
(9) 20.00 ft on 03/16/1929
(10) 19.68 ft on 07/10/1969
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 18.83 ft on 03/17/2019
(2) 18.96 ft on 09/23/2018
(3) 11.74 ft on 10/01/2016
(4) 22.95 ft on 09/24/2016
(5) 10.94 ft on 09/19/2016
(6) 11.15 ft on 09/12/2016
(7) 12.44 ft on 08/27/2016
(8) 9.74 ft on 07/20/2016
(9) 10.96 ft on 06/17/2016
(10) 9.86 ft on 06/13/2016
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 4.65 ft on 01/28/1959
(2) 4.69 ft on 12/22/1989
(3) 4.74 ft on 01/21/1956
(4) 4.78 ft on 01/10/1957
(5) 4.78 ft on 02/02/1950
Show More Low Water Records

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:
(1) These maps depict the impacts of the Cedar River backwater on smaller local tributary streams. The maps do not make any assumptions on the flow conditions on the local tributaries. Mapping on smaller local tributary streams may not represent actual conditions during periods of high flows on the smaller local tributary streams.

(2) Flooding along Black Hawk Creek and the Cedar River, downstream of Black Hawk Creek, may be worse than depicted during periods of high flows on Black Hawk Creek.

(3) This map shows flooding that is representative of 2013 conditions. The accuracy of the mapping will be reduced if flood protection systems are developed or enhanced in post 2013 conditions.

(4) The AHPS flood inundation maps, when compared to the regulatory FEMA DFIRM mapping, will depict different flooding scenarios. The differences occur because AHPS and FEMA maps have been designed for different purposes and developed based on different assumptions.

Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
30 This is the height of the Waterloo levee design protection.
26 Sandbagging is necessary at Fairview Cemetery.
25 The 18th Street bridge is closed. Levee gates are also closed throughout the downtown area of Waterloo.
24 The following bridges are closed...Westfield Avenue...East 6th Street and West 6th Street railroad...11th Street as well as Park Avenue.
18 The access road to wastewater treatment plant is closed.
17 Many storm sewers are closed along the Cedar River.
16 The Riverview Recreation Area is closed.
13 Many storm sewers are closed along Black Hawk Creek and the Cedar River. The Fletcher Avenue levee gates are closed.
10 Storm sewers are closed behind the Cattle Congress.
Other Data Sources Collapse
Additional Information Collapse
  • USGS 7-Day Streamflow Duration Hydrograph for this location:
    Duration Hydrograph

    Duration Hydrograph Legend


  • USGS Cumulative Streamflow Hydrograph for this location:
    Duration Hydrograph of Cumulative Streamflow
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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.