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wetlands through land use planning, acquisition and wetland protection laws.
wetlands to improve wetland health and function and by re-establishing destroyed wetlands.
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Compensatory mitigation

Wetland compensatory mitigation Current reporting information

Number of proposals

From February 2002 to December 2010, DNR approved 106 proposals that included wetland compensatory mitigation. Table 1 shows that most of the mitigation proposals resulted in the purchase of bank credits. We have also approved six new mitigation banks since 2002, and five bank proposal is in the review process.

Table 1: Total wetland mitigation applications from February 2002 to December 2010
Mitigation applications Number of proposals
Approved project-specific mitigation 17
Approved bank credit purchase 89
Subtotal 106
Application review pending 9
Application withdrawn 11
Total 126

Wetland loss and compensation acreage

Table 2 shows that most authorized compensatory mitigation projects involve wetland fills less then one acre.

Table 2: Acres impacted by approved applications that included a compensatory mitigation proposal (February 2002 to May 2010)
Type of mitigation approved Total wetland acres lost Average acreage lost per permit Range of wetland impact acreage
Project-specific mitigation 23.6 1.4 0.07-14.3
Bank mitigation 40.3 0.45 0.01-2.9
Total acres 63.9 0.6

A total of 40.3 credits have been purchased from mitigation banks as a result of the state program. Most on-site mitigation projects are still in the construction stage or have only been monitored for one to four growing seasons post-construction. It can be difficult to predict what ecological community will result from a restoration project, and so we cannot report what the final acreage of wetlands restored or created is for project-specific mitigation until five- to ten-year monitoring periods have ended.

Report to the Wisconsin state legislature on mitigation

The department's most recent biennial report on wetland compensatory mitigation [PDF] includes information on the program's activities through the end of 2010.

Last revised: Wednesday February 19 2014