MI SB0468

Clarifies definition of "dam" to require structures be 6 feet or more in height and have either 5 surface acres or 15 acre-feet of impounding capacity at design flood elevation.

Requires dam owners to prepare and maintain current operations and maintenance records, first-filling plans, surveillance and monitoring plans for high/significant hazard dams, and abandonment plans when applying for dam removal permits.

Increases inspection frequency requirements: high hazard dams from every 3 years to annually (1/3 of dams per year), significant hazard dams from every 4 years to every 2 years (1/2 of dams per year), and expands inspection report contents to include emergency action plan reviews and hazard classification assessments.

Requires dam owners to submit proof of financial responsibility with permit applications and establishes updated emergency action plan requirements including annual reviews, submissions to local emergency management and zoning authorities, and periodic exercises.

Adds requirement that owners of dams previously licensed under federal power act provide the department with inventory of information previously submitted to Federal Energy Regulatory Commission.