What is the primary purpose of marking the mean high-water line?

Marking the mean high-water line serves the essential function of defining jurisdictional boundaries between properties. This line is critical in areas adjacent to water bodies, as it delineates the point where water levels influence land ownership rights and responsibilities. Property lines often extend to this line, which establishes ownership and the extent of rights over the land adjacent to the water.

By accurately marking the mean high-water line, authorities and property owners can better manage disputes regarding land use, development, and environmental protection. The line is vital for land use planning, ensuring that developments comply with local and state regulations, as it helps to clarify how much of a property may be affected by water and potentially influenced by regulations pertaining to floodplain management and land use along waterways.