Cal-Sag / Little Calumet low fixed bridge group

Cal-Sag / Little Calumet low fixed bridge group on Calumet Sag Channel / Little Calumet Rivernear Chicago south suburbs, IL; closed clearance about 24.6 ft. Route-choice control point.

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.

41.69500000, -87.74000000

Published Fixed bridgeRailroad bridgeAir draft concern

WaterwayCalumet Sag Channel / Little Calumet River

Route SegmentRoute-wide

Route VariantCal-Sag option

State / ProvinceIL

Nearest CityChicago south suburbs

Mile MarkerMM 303.9-325.3

Bridge TypeFixed railroad/highway bridges

Source Confidencemedium

Clearance And Opening Details

Vertical Clearance Closed24.60 ft

Vertical Clearance OpenNot verified

Horizontal Clearance225.00 ft

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: 24.6 ft. Datum/reference: USACE low operating level / flat pool. Clearance band: Low / Timing-sensitive
Opening Schedule: Alternate to downtown Chicago; route has many 25-ft class bridges.
Operator / Contact: Not verified
Navigation Notes: Alternate to downtown Chicago; route has many 25-ft class bridges. Cal-Sag avoids downtown Chicago's lower 17-ft route but still has low fixed bridges and industrial traffic. Closed/air-draft clearance: 24.6 ft. Datum/reference: USACE low operating level / flat pool. Clearance band: Low / Timing-sensitive Alternate to downtown Chicago; route has many 25-ft class bridges.
Regulatory Notes: Alternate to downtown Chicago; route has many 25-ft class bridges. Cal-Sag avoids downtown Chicago's lower 17-ft route but still has low fixed bridges and industrial traffic.