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.
Sangamon County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 197,465. Its county seat is Springfield, the state capital. Sangamon County is included in the Springfield, IL Metropolitan Statistical Area.