Property elevation survey project begins in December

Staff Report

Beginning in early December, the City of Rockford and the Illinois State Water Survey (ISWS) will be performing elevation surveys of properties within or near the mapped Federal Emergency Management Agency (FEMA) 1 percent annual chance floodplain of the Rock River and its tributaries.

The 1 percent annual chance floodplain means there is a 1 percent chance each year that a particular area will flood when it rains approximately 7 inches in a 24-hour time period in Rockford. There are approximately 2,400 structures within this floodplain in the Rockford area.

The survey work will begin in the Spring Creek Watershed and will progress through the mapped area as weather permits. Property owners along and near the creeks will be notified by letters on the door and through electronic media approximately two weeks prior to surveying a particular creek and watershed in their area. This will include properties within the Village of Cherry Valley, Cherry Valley Township and Rockford Township.

This work is being completed as part of a grant the city and ISWS received for flood mitigation efforts. The surveys are being conducted to identify and prioritize appropriate floodplain mitigation actions.

The City of Rockford will be partnering with the ISWS and the Illinois Department of Natural Resources, Office of Water Resources (IDNR/OWR), to obtain and analyze detailed, structure-by-structure, flood-risk data. The analysis will include first-floor elevation and low-entry elevation of buildings larger than 400 square feet that are situated within or near the mapped FEMA 1 percent annual chance floodplain of the Rock River and its tributaries.

The data gathered during this study will assist the city and the state in preparing a benefit cost analysis with the ultimate goal of creating a comprehensive plan and prioritizing mitigation projects in the city and the region.

To receive information through electronic media, register at, or with your mobile phone, text your ZIP code to 888777.

Questions concerning this project should be directed to Marcy Leach at (815) 967-6740.

Posted Nov. 26, 2014

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