Does IDEM use set mitigation ratios/ have specific mitigation requirements?
In general, IDEM requires that impacted wetlands be replaced with wetlands of the same type (e.g., a forested wetland that is filled must be replaced with a forested wetland). However, IDEM may, under limited circumstances and in rare occasions, allow an applicant to create or restore a different type of wetland or aquatic habitat if that “out-of-kind” mitigation will provide better water quality. The compensation ratios below are required for wetland impacts regulated under the Clean Water Act. Alternative mitigation ratios are required for impacts to isolated wetlands (those wetlands not regulated under the Clean Water Act) that are permitted under Indiana’s State Isolated Wetlands Law. 4 acres compensation required for each 1 acre of impact (4:1) for forested wetland impacts 4:1 and above for unique or rare wetlands such as bogs, fens, etc. 3:1 for scrub-shrub wetland impacts 2:1 for emergent wetland impacts 1:1 for open water and other Waters of the U.S. impacts 1:1 (foot for foot)
In general, IDEM requires that impacted wetlands be replaced with wetlands of the same type (e.g., a forested wetland that is filled must be replaced with a forested wetland). However, IDEM may, under limited circumstances and in rare occasions, allow an applicant to create or restore a different type of wetland or aquatic habitat if that “out-of-kind” mitigation will provide better water quality. The compensation ratios below are required for wetland impacts regulated under the Clean Water Act. Alternative mitigation ratios are required for impacts to isolated wetlands (those wetlands not regulated under the Clean Water Act) that are permitted under Indiana’s State Isolated Wetlands Law. • 4 acres compensation required for each 1 acre of impact (4:1) for forested wetland impacts • 4:1 and above for unique or rare wetlands such as bogs, fens, etc. • 3:1 for scrub-shrub wetland impacts • 2:1 for emergent wetland impacts • 1:1 for open water and other Waters of the U.S. impacts • 1:1 (fo
Related Questions
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