HB 5485 Michigan House · 2025-2026 Regular Session

Natural resources: inland lakes; dam safety regulations; provide for. Amends secs. 31502, 31503, 31504, 31505, 31506, 31507, 31508, 31509, 31510, 31511, 31513, 31515, 31516, 31517, 31518, 31520, 31521 & 31523 of 1994 PA 451 (MCL 324.31502 et seq.) & adds secs. 31506a, 31509a, 31509b, 31517a, 31518a, 31518b, 31518c, 31518d, 31528a & 31528b.

HB 5485 updates Michigan's dam safety regulations for inland lakes by revising definitions and adding new sections to the Natural Resources and Environmental Protection Act. The bill directly affects dam owners, operators, and the state agency responsible for dam safety oversight. Key changes include updated terms like "spillway capacity" and "emergency action plan," alongside new regulatory sections (e.g., 31506a, 31509a) to modernize safety standards. These amendments clarify requirements for dam maintenance, flood management, and structural integrity without altering existing enforcement procedures.
Bill status passed both 4 of 5 stages cleared
Introduction
Jan 2026
Committee Review
Jul 2026
House Passage
Jul 2026
Senate Passage
Jul 2026
Governor
Introduced Jan 29, 2026 Last action Jul 29, 2026
Maddy AI version diff · 2 comparisons

What changed between versions

Substitute (H-4) As Passed by the House · 14 edits · Jul 3, 2026
MAJOR
The As Passed by the House version of HB 5485 adds several major new requirements not present in the Substitute (H-4) version, including a staggered dam owner registration system, comprehensive evaluation reports every 10 years, surveillance and monitoring plans, operation and maintenance plans, safety and security plans, a dam safety emergency fund, and a dam risk reduction grant program. It also tightens inspection frequencies for high and significant hazard dams, adds preapplication meeting rights, creates fee adjustment mechanisms tied to inflation, and adds provisions addressing conflicts between federal and state dam safety requirements.
REQUIREMENT

New section 31509a establishes a staggered registration process where all dam owners must register with the department in 5 rounds over time. Registration is valid for 15 years and requires proof of ownership, an asset management plan (including inventory, condition assessment, failure probability analysis, funding sources, and performance evaluation), and demonstrated compliance with inspection, comprehensive evaluation, surveillance, operation/maintenance, and safety/security requirements. The department can deny or revoke registrations.

New section 31518a requires owners to submit a comprehensive evaluation report prepared by a licensed professional engineer every 10 years, evaluating overall dam safety including condition, design adequacy, operation procedures, failure modes, and conformance with current practices.

New sections 31518b, 31518c, and 31518d require owners to prepare and maintain surveillance and monitoring plans, operation and maintenance plans (including inspection checklists, normal/emergency procedures and logs), and safety and security plans (including physical security measures, response procedures, and notification of incidents within 24 hours).

Inspection frequency was tightened: high hazard potential dams now require inspection reports every year (previously every 3 years) and significant hazard potential dams every 2 years (previously every 4 years). The department must establish an inspection schedule requiring annual submission for approximately 1/3 of high hazard, 1/2 of significant hazard, and 1/5 of low hazard potential dams.

New subsection 31509(7) allows applicants to request a preapplication meeting with the department before submitting a permit application. The department must meet within 30 days at the district office or project site.

Section 31508 now requires that plans and specifications include documentation showing the engineer or design team has completed at least 5 similar projects (new dam construction, reconstruction of failed dam, enlargement, complex alteration, or removal) or has been in consultation with engineers who have.

FISCAL

New section 31528a creates a dam safety emergency fund within the state treasury to finance remedial or corrective actions when an owner is unable or unwilling to address significant safety risks. The department and attorney general may recover costs from the owner.

New section 31528b establishes a dam risk reduction grant program providing grants to owners for repair, alteration, or removal of dams, requiring owners to contribute at least 10% matching funds.

TIMELINE

New section 31509b requires the department to adjust permit fees every 3 years starting January 1, 2029, based on cumulative percentage change in the Detroit Consumer Price Index, rounded to the nearest $10.

ELIGIBILITY

The fee waiver provision in section 31509 was expanded from referencing organizations described in section 31508(2)(a) through (c) to any nonprofit organization with assets under $30,000 that is 501(c)(3) exempt and not composed primarily of adjacent property owners.

SCOPE

Section 31506 adds provisions for dams licensed under the federal power act: registration and comprehensive evaluation reports are not required if the owner has already provided that information to the department; if federal and state requirements are contradictory, the department must modify state requirements to allow compliance with both; and documents designated as critical energy infrastructure by the Department of Energy are exempt from the freedom of information act.

New section 31506a requires owners of dams previously or currently licensed under the federal power act that subsequently come under state jurisdiction to provide the department with the full inventory of information previously provided to FERC.

Section 31510 was changed from a biweekly mailed list system with a $25 annual fee to a website posting and email notification system for pending registration applications and public hearing notices.

ENFORCEMENT

Section 31521 adds subsection (4) allowing the department to modify emergency order requirements during their conduct if necessary to protect public health, safety, welfare, property, or natural resources.

Floor votes · House Jul 3, 2026

How they voted

This bill passed the Senate by voice vote (no roll call recorded).
Full legislative history

Actions timeline

Total actions
15
Key actions
4
Committee
3
Jul 29, 2026
Committee
REFERRED TO COMMITTEE ON APPROPRIATIONS
upper
Jul 29, 2026
Upper · Passed
PASSED BY HOUSE WITH IMMEDIATE EFFECT
upper
Jul 3, 2026
Lower · Passed
passed; given immediate effect Roll Call #298 Yeas 100 Nays 8 Excused 0 Not Voting 2
lower
Jul 2, 2026
Lower · Passed
substitute (H-4) adopted
lower
Jul 2, 2026
Lower · Passed
motion to discharge committee approved
lower
Jan 29, 2026
Committee
referred to Committee on Natural Resources and Tourism
lower
Jan 29, 2026
Introduced
introduced by Representative Rep. Bill Schuette
lower
1 primary · 9 co-sponsors

Sponsors