Great Loop bridge planning reference

Monroe Street Bridge

Monroe Street Bridge on South Branch Chicago Rivernear Chicago, IL; closed clearance about 19.4 ft. Low downtown bridge.

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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41.88040000, -87.63800000

Planning only Drawbridge / movable Air draft concern
WaterwaySouth Branch Chicago River
Route SegmentIllinois / Chicago
Route VariantInland Rivers / Chicago or Cal-Sag
State / ProvinceIL
Nearest CityChicago
Mile MarkerRM 325.2
Bridge TypeBascule
Source Confidencemedium

Clearance And Opening Details

Vertical Clearance Closed19.40 ft
Vertical Clearance OpenNot verified
Horizontal Clearance156.00 ft
VHF ChannelNot verified
PhoneNot verified
Last Verified2026-06-08
Bridge contact information has not been verified yet. Confirm current opening procedures before transit.
Verify against current water level / bridge gauge before transit.

Planning Notes

Air Draft Notes
Closed/air-draft clearance: 19.4 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Route-limiting / Critical
Opening Schedule
Bascule; verify opening restrictions.
Operator / Contact
Not verified
Navigation Notes
Bascule; verify opening restrictions. Part of low downtown bridge group. Closed/air-draft clearance: 19.4 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Route-limiting / Critical Bascule; verify opening restrictions.
Regulatory Notes
Bascule; verify opening restrictions. Part of low downtown bridge group.