Olson's study states that the Future City area has the capacity to provide an additional 3,000 acres of unintended floodwater storage and an additional 30,000 to 45,000 acre-feet of floodwater storage if the Cache River levee break had occurred.
"This area, which is at a slightly higher elevation, could store water to a 10- to 15-foot depth, depending on the location, and also includes levee-protected Illinois farmland," Olson said. "Ultimately, the Illinois agricultural land inside the Cairo seawall and levee system was protected from flooding, and there was no crop loss or soil damage. The Illinois cropland outside the levee was flooded before the 2011 crop was planted, and the water dropped sufficiently by June 10, 2011, to permit the planting of soybeans."
"The effects of 2011 Ohio and Mississippi river valley flooding on Cairo, Illinois, area," co-authored by Lois Wright Morton, was published in the March/April 2012 issue of the Journal of Soil and Water Conservation.