| 17.0 | WATER REACHES THE WALKWAY OF THE USGS GAGE HOUSE | | 15.0 | THIS IS THE APPROXIMATE TOP OF LEVEE PROTECTION. LEVEES RUN FROM THE 12TH STREET NE BRIDGE TO 9TH STREET ALONG THE LEFT OR EAST BANK AND ALSO FROM 8TH STREET TO 6TH AND HAMPSHIRE STREETS. | | 14.0 | THIS IS THE US ARMY CORPS OF ENGINEERS MAJOR FLOOD STAGE...WATER GOES OVER THE CITY DIKES. | | 12.0 | SIGNIFICANT FLOODING OCCURS WITHIN ALL THE WINNEBAGO RIVER FLOOD PLAIN. SOME BACKWATER EFFECTS ARE POSSIBLE ALONG WILLOW CREEK BETWEEN DOWNTOWN MASON CITY AND THE CONLFUENCE WITH THE WINNEBAGO RIVER | | 11.0 | SAND BAGGING OPERATIONS BEGINS ON THE DIKE FROM 12TH ST NE TO CAROLINA ST. | | 10.0 | THERE IS SIGNIFICANT FLOODING OF CITY PARKS AND WATER REACHES THE UNDERSIDE OF THE 12TH STREET NE BRIDGE AT THE PIERS | | 8.0 | EAST AND WEST CITY PARKS ARE AFFECTED DOWNSTREAM FROM THE GAGE SITE. | | 7.0 | LOW LYING AREAS ALONG THE RIVER ARE AFFECTED |
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1) 15.70 ft on 03/30/1933
2) 14.80 ft on 03/27/1961
3) 14.27 ft on 04/11/1965
4) 13.70 ft on 04/06/1965
5) 13.06 ft on 08/31/1962
6) 12.59 ft on 04/01/1993
7) 12.44 ft on 04/07/1951
8) 12.25 ft on 07/08/1969
9) 12.20 ft on 06/12/1944
10) 11.94 ft on 06/08/1984
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1) 0.00 ft on 08/14/1989
1) 0.00 ft on 08/19/1989
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