What is the high water mark?

The concept of the high water mark primarily refers to the highest elevation reached by floodwaters on a specific waterway, making it crucial for understanding flood impact and land ownership. This mark can indicate the extent of flooding in a particular area and can serve as a reference point for property owners and local authorities regarding flood management and land use.

While the maximum flood elevation established for lakes with dams is important in water management and planning, it does not encompass the broader definition of high water mark in relation to natural waterways. The high water mark is not limited to lakes with dams; rather, it applies to rivers, streams, and other bodies of water, documenting the impact of flooding over time.

Understanding the distinction between these concepts is vital. The high water mark serves as an important legal and environmental benchmark for various purposes, such as property rights and assessing ecosystem health, ensuring that the most accurate information is emphasized in response to flooding.