Great Lakes shorelines are always changing. Erosion is an expected and natural process along the Great Lakes. Water levels, wave action, the local geology, and plants impact how shorelines erode. People love living on the shoreline yet sometimes their homes are too close to the edge of a bluff. When shoreline conditions change the bluff, those homes may be in danger of falling into the lake.
The High-Risk Erosion Area Program identifies those shorelines receding at an average annual rate of one foot per year or greater over a minimum period of 15 years. Along these shorelines, new structures are required to meet a setback distance from the erosion hazard line. Setbacks are determined for the projected recession distance of the shoreline 30 years and 60 years into the future. The 30-year setback is for structures built to be readily moveable. Readily moveable structures meet specific construction criteria and have access that is sufficiently wide and with appropriate grades to accommodate relocation. The 60-year setback is for non-readily moveable structures.
When structures are not in danger the shoreline does not need to be altered to protect the structure. The shoreline and people can adapt to the changeable conditions of the Great Lakes.
HREAs are regulated by the Administrative Rules of Part 323, Shorelands Protection and Management, of the Natural Resources and Environmental Protection Act, 1994 PA 451, as amended.