Small unsteady spoil banks/ levees can be built up to form a 'bowl' shape. Then with the help of dredges, soil can be pumped in and marsh grasses planted. Once the marsh grasses build up, levees will begin to collapse creating a new vegetated marsh area.
Worden is a village in Madison County, Illinois, United States.
Springfield is the capital of the U.S. state of Illinois and the county seat of Sangamon County with a population of 116,250, as of the 2010 U.S. Census, making it the sixth most populated city in the state. It is the largest city in central Illinois.