41.66500000, -87.95000000
Fixed bridgeRailroad bridge
WaterwayCalumet Sag Channel
Route SegmentIllinois / Chicago
Route VariantInland Rivers / Chicago or Cal-Sag
State / ProvinceIL
Nearest CityLemont / Alsip area
Mile MarkerRM 303.9
Bridge TypeFixed railroad
Source Confidencemedium
What Boaters Should Know
Gulf Mobile & Ohio Railroad Bridge on Calumet Sag Channelnear Lemont / Alsip area, IL; closed clearance about 24.6 ft. Low Cal-Sag bridge.
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.
Opening / Contact Notes
- Opening Schedule
- Fixed.
- Operator / Contact
- Not verified
Navigation And Regulatory Notes
- Air Draft Notes
- Closed/air-draft clearance: 24.6 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Low / Timing-sensitive
- Navigation Notes
- Fixed. Important alternate route clearance. Closed/air-draft clearance: 24.6 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Low / Timing-sensitive Fixed.
- Regulatory Notes
- Fixed. Important alternate route clearance.
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.