| 23.0 | Water reaches the top of the road surface at the bridge. | | 22.4 | Is the low point on the west bridge approach. | | 18.0 | Is the approximate height of the underside of the bridge deck. | | 16.0 | The east approach of the bridge at the gage site is affected. | | 14.5 | Northwest 62nd Avenue in Johnston is flooded. | | 14.0 | County Road R22 begins to flood south of highway 141. County Road F31 west of Granger floods and northwest 62nd street in Johnston floods. | | 13.3 | County Road F31 west of Granger is threatened. | | 12.6 | Water reaches the top of the concrete drain pipe in downstream right bank. | | 12.0 | The left bank overflows just downstream of the gage site. |
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1) 16.58 ft on 07/10/1993
2) 14.73 ft on 06/30/1986
3) 14.69 ft on 05/19/1974
4) 14.20 ft on 06/19/1990
5) 14.05 ft on 05/26/1960
6) 14.04 ft on 06/13/1966
7) 13.88 ft on 03/20/1979
8) 13.86 ft on 04/27/2007
9) 13.35 ft on 02/20/1971
10) 13.25 ft on 04/02/1965
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1) 2.70 ft on 09/21/1988
2) 0.00 ft on 10/06/1994
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