The County of DuPage
Wheaton, Illinois
 

Natural Areas

Wetland and Buffers Program

DuPage County has been recognized for having a comprehensive stormwater program. 

The primary mechanism to implement the wetland and buffers program is the DuPage County Stormwater and Floodplain Ordinance (Ordinance). Since many wetland functions are difficult and expensive to replace, the Ordinance requires that an applicant avoid or minimize impacts to wetland if possible. Wetland impacts are be replaced, or mitigated, in the same watershed. Impacted buffer functions are replaced in kind. Wetland replacement ratios and buffer widths are based on the quality of a wetland which is determined by analyses of habitat and vegetation quality, and the presence of Endangered or Threatened Species.

Wetland Maps

DuPage County developed wetland maps in the late 1990s. Since that time, development in the County has significantly changed the landscape. In 2013, the County will begin the process of modernizing these maps. This will allow the County to provide more accurate information to residents, developers and businesses. Please visit the Wetland Map Initiative page for more information.

Wetland Banking

The Wetland Banking Program was adopted by the Stormwater Management Planning Committee and County Board in 1993 to give the development community the option of offsite wetland replacement while keeping the significant benefits of wetlands in the same watershed as the impact. Wetland bank fees are based on a detailed cost estimate unique to the project. When a wetland mitigation bank is not available, developers may choose to pay a fee of $175,000 per acre. The fee is used by the county to construct the replacement wetland in a future bank project when one becomes available.

The County has several wetland banks and wetland mitigation projects in various stages of development. The Cricket Creek and Downers Grove projects have both been completed. Springbrook Prairie is in its maintenance phase, and two other projects, located in West Branch and Danada Forest Preserves, are currently in design.