Great Loop bridge planning reference

Hardin Drawbridge

Hardin Drawbridge on Illinois Rivernear Hardin, IL; closed clearance about 27.4 ft. Low movable inland river bridge.

39.15800000, -90.61700000

Drawbridge / movable
WaterwayIllinois River
Route SegmentIllinois / Chicago
Route VariantInland Rivers / Chicago or Cal-Sag
State / ProvinceIL
Nearest CityHardin
Mile MarkerRM 21.6
Bridge TypeLift
Source Confidencemedium

What Boaters Should Know

Hardin Drawbridge on Illinois Rivernear Hardin, IL; closed clearance about 27.4 ft. Low movable inland river bridge.

Clearance And Opening Details

Vertical Clearance Closed27.40 ft
Vertical Clearance Open66.50 ft
Horizontal Clearance300.00 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.

Opening / Contact Notes

Opening Schedule
Lift bridge; verify operating status.
Operator / Contact
Not verified

Navigation And Regulatory Notes

Air Draft Notes
Closed/air-draft clearance: 27.4 ft. Open clearance: 66.5 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Route-relevant
Navigation Notes
Lift bridge; verify operating status. River current/debris and commercial traffic considerations. Closed/air-draft clearance: 27.4 ft. Open clearance: 66.5 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Route-relevant Lift bridge; verify operating status.
Regulatory Notes
Lift bridge; verify operating status. River current/debris and commercial traffic considerations.

Planning Considerations

Confirm your vessel air draft, current water levels, bridge signage, official charts, bridge schedules, Local Notices to Mariners, and any VHF or phone procedures before approaching this bridge. If the bridge is movable, build extra time into your route plan for opening windows, traffic, restrictions, weather, and communication delays.

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.