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Rock River at Afton, WI (AFTW3)


Data Type




Inundation Levels
NAVD88 Stage

757.115.0
756.114.0
Record Crest: 13.51 ft
755.113.0

Major Flooding Begins

754.312.2

Moderate Flooding Begins

753.211.1
752.110.0

Minor Flooding Begins

751.19.0

Near Flooding Begins

750.18.0
* = Extended rating
Weather Forecast Office Milwaukee/Sullivan, WI 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:
5.2 ft at 11/25/2017 03:15:00 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.

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Map Overlays

Flood Categories (in feet)
Major Flood Stage: 12.2
Moderate Flood Stage: 11.1
Flood Stage: 9
Action Stage: 8
Low Stage (in feet): -9999

Historic Crests
(1) 13.51 ft on 06/21/2008
(2) 13.05 ft on 02/05/1916
(3) 12.21 ft on 01/23/2008
(4) 11.86 ft on 04/05/1979
(5) 11.77 ft on 04/10/1959
(6) 11.76 ft on 04/18/2013
(7) 11.50 ft on 03/25/1918
(8) 11.41 ft on 04/23/1993
(9) 11.25 ft on 04/01/1975
(10) 8.94 ft on 04/07/2017
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.94 ft on 04/07/2017
(2) 8.78 ft on 07/13/2014
(3) 11.76 ft on 04/18/2013
(4) 13.51 ft on 06/21/2008
(5) 12.21 ft on 01/23/2008
(6) 11.41 ft on 04/23/1993
(7) 11.86 ft on 04/05/1979
(8) 11.25 ft on 04/01/1975
(9) 11.77 ft on 04/10/1959
(10) 11.50 ft on 03/25/1918
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.09 ft on 08/26/1934
(2) 1.89 ft on 09/20/2012
(3) 2.02 ft on 07/15/2012
(4) 2.28 ft on 09/07/2003
(5) 2.44 ft on 09/20/2005
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.

Flood Impacts Collapse
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13.3 There is widespread flooding in the Afton and Janesville areas. Numerous roads are closed including South River Road on the south side of Janesville, Joseph and Charles Streets and the on-ramp to Memorial Drive. The intersection of Wall Street and Main Street is closed. Traxler Park in Janesville is flooded and closed. This level is the 1 percent chance flood meaning there is a 1 percent chance of the river reaching this level in any given year.
13 This level is the 2 percent chance flood meaning there is a 2 percent chance in any given year of the river reaching this level. There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets are closed including South River Road on the south side of Janesville and several blocks of Joseph and Charles Streets. The intersection of Wall Street and Main Street is closed. Traxler Park in Janesville is flooded and closed.
12.9 There is widespread flooding in the Afton and Janesville areas. Numerous roads are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed. The intersection of Wall Street and Main Street is closed. Traxler Park in Janesville is flooded and closed.
12.4 This level is about a 4 percent chance flood meaning there is a 4 percent chance in any given year of the river reaching this level. There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, a portion of Main Street, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed. Traxler Park in Janesville is flooded and closed.
12.2 There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets adjacent to the river are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, a portion of Main Street, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed as is a portion of Riverside Drive. Traxler Park off of Memorial Drive in Janesville is flooded and closed.
11.5 Water surrounds at least 2 homes near the river in the Afton area. Numerous secondary roads in the Afton area are closed to traffic. Floodwaters affect South River Road on the south side of Janesville. Traxler Park off of Memorial Drive in Janesville is flooded.
11.1 Floodwaters affect Riverside Park and South River Road in Janesville and there is widespread lowland and agricultural land flooding in the Afton and Janesville areas. This level is the 10 percent flood meaning that there is a 10 percent chance of the river reaching this level in any given year.
10.7 Floodwaters affect a road in Riverside Park on the north side of Janesville and South River Road on the south side of Janesville. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas.
10.5 Floodwaters affect Riverside Park on the north side of Janesville and South River Road on the south side of Janesville. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas.
10.4 Floodwaters affect low spots on South River Road on the south side of Janesville. Floodwaters affect a home on South Christian Road on the east side of the river in the Afton area. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas.
10.1 Floodwaters affect the property of a home on South Christian Road on the east side of the river in the Afton area. Minor erosional flood damage occurs to lowland and agricultural land adjacent to the river the Afton and Janesville areas. This level is the 20 percent chance flood meaning that there is a 20 percent chance in any given year of the river reaching this level.
9.1 Floodwaters affect property of a home on South Christian Road on the east side of the river in the Afton area. There is minor erosional flood damage to lowland and agricultural land in the Afton and Janesville areas.
9 Minor erosional flood damge occurs to lowland and agricultural land adjacent to the river in the Afton and Janesville areas.
8.8 Floodwaters affect lowland and agricultural land adjacent to the river in the Afton and Janesville areas. This level is about a 50 percent chance flood meaning that there is a 50 percent chance in any given year of the river reaching this level.
8.5 Floodwaters spread into lowland and agricultural land adjacent to the river in the Afton and Janesville areas.
8 Water overflows the lower river banks in the Afton and Janesville areas. The river width is about 240 feet in the area of the gauge.
Photos
(1) Aerial photo looking west-Rock River at Afton, WI
(2) Aerial photo looking north-Rock River at Afton, WI
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Page last modified: 21-Dec-2016 5:25 PM
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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.