How is the "Ordinary high-water mark" defined?

The "Ordinary high-water mark" refers to the typical high point reached by water within rivers, streams, and lakes, which can signify the line between dry land and bodies of water. This mark is critical for various environmental and regulatory purposes, such as determining jurisdictional boundaries for wetland regulations and assessing land use near bodies of water.

Understanding this definition highlights its significance in environmental management practices, as it helps in protecting aquatic ecosystems and managing development in vulnerable areas. This mark does not refer to groundwater levels, seasonal flooding boundaries, or zones of treated water in sewage systems, which are distinct concepts with different implications in water resource management and environmental regulation.