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.
Virden is a city in Macoupin and Sangamon counties in the U.S. state of Illinois.The population was 3,488 at the 2000 census, and 3,338 at a 2009 estimate.The Macoupin County portion of Virden is part of the St. Louis, Missouri âIllinois Metropolitan Statistical Area, while the Sangamon County portion is part of the Springfield Metropolitan Statistical Area.Virden was the scene of an 1898 coal miners' strike, during which Mary Harris Mother Jones played a major role.he population was 3,488 at the 2000 census, and 3,338 at a 2009 estimate. The Macoupin County portion of Virden is part of the St. Louis, Missouri âIllinois Metropolitan Statistical Area, while the Sangamon County portion is part of the Springfield Metropolitan Statistical Area.