Several requests have been made to the City of Sioux City to provide the surface elevation of the water as it relates to the 109 foot anticipated crest of the Big Sioux River. This level is 1101.7 ft above mean sea level. Residents are reminded that this number represents the level of the water in the channel. The levee system and the levee extension are designed and built to protect properties from flooding. Based upon this anticipated water level the levee is of an adequate height to contain the water within the structure.
The following information is provided to give a historical reference to past high water events. The numbers represent historical high water crests and the dates on which they occurred.
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