This bill amends the Natural Resources and Environmental Protection Act to enhance dam safety and management through updated definitions and requirements. Key insertions include new definitions for "additional spillway capacity," "inflow design flood," and "probable maximum flood," which clarify the standards for dam construction and maintenance. The bill introduces a staggered registration process for dam owners, mandating the submission of detailed asset management plans and compliance documentation to ensure public safety and environmental protection. It also modifies existing definitions, such as changing the term "abandonment," and refines the criteria for hazard potential classifications of dams, emphasizing the need for licensed professional engineers to prepare plans, while allowing exceptions for nonprofit organizations under certain conditions.

Furthermore, the bill revises the safety and inspection regulations for dams based on their hazard potential. It establishes that significant hazard potential dams must be capable of passing the "half probable maximum flood" or the flood of record, replacing the previous "200-year flood" requirement. High hazard potential dams must also meet this new flood capacity requirement. The bill mandates annual inspections for high hazard dams, biennial inspections for significant hazard dams, and inspections every five years for low hazard dams, with detailed inspection reports required. Additionally, comprehensive evaluation reports must be submitted every ten years for high and significant hazard potential dams, ensuring ongoing monitoring and maintenance to safeguard public health and safety.