Mackinac Bridge Key Facility Designation

Current understanding

To be populated as evidence accumulates.

Evidence log

• 2026-05-07 — Highways: bridges; requirement to pay a toll after a closure; prohibit. Amends sec. 12 of 1952 PA 214 (MCL 254.322).: cross-connection with bridge-toll-after-closure: SB0949 amends the 1952 Mackinac Bridge Authority act (MCL 254.322), the same statutory framework governing the Mackinac Bridge that is separately designated as a key facility. (novelty: 2)
• 2026-01-21 — Crimes: trespassing; prohibition against entering a key facility; expand. Amends sec. 552c of 1931 PA 328 (MCL 750.552c).: cross-connection with key-facility-definition-expansion: Both act on MCL 750.552c: the Mackinac Bridge page tracks a specific facility’s designation under sec. 552c, while HB 5465 would expand the sec. 552c key-facility list generally. (novelty: 2)
• 2025-12-02 — Aeronautics: unmanned aircraft systems; database of restricted zones and flight paths for unmanned vehicles; create and provide penalties for using unmanned vehicles in a restricted zone or flight path. Creates new act. TIE BAR WITH: HB 5321’25: cross-connection with uas-restricted-zones-database: The Mackinac Bridge’s key-facility designation could plausibly overlap with zones enumerated in a UAS restricted-zone database, depending on which sites are included. (novelty: 3)
• 2025-12-02 — Aeronautics: unmanned aircraft systems; flying over or trespassing on a key facility or critical infrastructure with an unmanned aircraft or vehicle; prohibit. Amends sec. 45a of 1931 PA 328 (MCL 750.45a).: HB 5319 (amending MCL 750.45a) would extend key-facility/critical-infrastructure trespass prohibitions to unmanned aircraft overflight, complementing the Mackinac Bridge’s designation as a key facility under the adjacent sec. 552c. (novelty: 2)
• 2026-07-29 — Highways: bridges; Mackinac Bridge; designate as a key facility. Amends sec. 552c of 1931 PA 328 (MCL 750.552c).: Enacted as PA 0064 of 2026, formally adding the Mackinac Bridge to the list of ‘key facilities’ under MCL 750.552c and extending penal-code trespass protections to the span. (novelty: 3)
• 2026-07-03 — Highways: bridges; Mackinac Bridge; designate as a key facility. Amends sec. 552c of 1931 PA 328 (MCL 750.552c).: SB 71 (amending MCL 750.552c) would add the Mackinac Bridge to the list of ‘key facilities’ under sec. 552c of 1931 PA 328, strengthening penal-code protections against trespass and related offenses; reported at passed-chamber stage. (novelty: 2)

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