How far must buildings be from the waterway's OHWM according to regulations?

The correct answer, which specifies a distance of 100 feet from the Ordinary High Water Mark (OHWM) for buildings near waterways, aligns with common regulatory standards aimed at preserving environmental integrity and preventing erosion.

This distance is typically enforced to maintain a buffer zone that protects water quality, provides habitat for wildlife, and minimizes the risk of flooding or damage to structures during high water events. Regulations often require this buffer to limit the direct impact of human activities on aquatic ecosystems and to reduce runoff pollution.

In many jurisdictions, local ordinances or state laws stipulate this 100-foot setback as a baseline requirement, although specific conditions and variations may apply depending on the site’s characteristics and the governing authority. Adhering to this distance helps ensure that buildings are constructed at a safe distance from bodies of water, reflecting a balance between development and environmental protection.