Rather, they require project proponents to demonstrate that their project is needed and to show that there is no reasonable way to avoid altering the wetland. If the project passes these tests, wetland regulations generally require the project sponsor to compensate for the lost wetlands by restoring previously drained or filled wetlands or by creating new wetlands. If you are concerned that a particular draining or filling activity is unauthorized, contact your local DNR conservation officer and the U.S. Army Corps of Engineers. Calcareous fens are rare peat wetlands characterized by cold inflowing groundwater containing dissolved calcium and magnesium, creating ecological conditions favorable to supporting certain very rare plants. Calcareous fens are found on slopes, such as at the base of river bluffs.
Fens have special protection under the Minnesota Wetlands Conservation Act.
The Guide to Scientific and Natural Areas lists several sites maintained by the SNA program with calcareous fens. All rights reserved.