Great Loop bridge planning reference

Mackinac Bridge

Mackinac Bridge on Straits of Mackinacnear Mackinaw City / St. Ignace, MI; closed clearance about 155 ft. Major Great Lakes landmark.

Planning awareness only: Bridge information is provided for planning awareness only. Always verify current bridge status, clearance, water levels, bridge schedules, opening restrictions, Local Notices to Mariners, bridge signage, and official charts before transit. FloatPlanWizard is not a navigation authority.

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45.81740000, -84.72780000

Planning only Fixed bridgeAir draft concern
WaterwayStraits of Mackinac
Route SegmentChesapeake / Hudson / Great Lakes
Route VariantCommon route or Loop alternative
State / ProvinceMI
Nearest CityMackinaw City / St. Ignace
Mile MarkerLake Michigan / Lake Huron
Bridge TypeFixed suspension
Source Confidencelow

Clearance And Opening Details

Vertical Clearance Closed155.00 ft
Vertical Clearance OpenNot verified
Horizontal ClearanceNot verified
VHF ChannelNot verified
PhoneNot verified
Last Verified2026-06-08
Verify against current water level / bridge gauge before transit.

Planning Notes

Air Draft Notes
Closed/air-draft clearance: 155 ft. Datum/reference: Planning value; verify NOAA ENC/current chart. Clearance band: High clearance
Opening Schedule
Fixed.
Operator / Contact
Not verified
Navigation Notes
Fixed. Not generally limiting; exposed water and weather are primary navigation issues. Closed/air-draft clearance: 155 ft. Datum/reference: Planning value; verify NOAA ENC/current chart. Clearance band: High clearance Fixed.
Regulatory Notes
Fixed. Not generally limiting; exposed water and weather are primary navigation issues.