41.65500000, -88.01100000
Fixed bridgeRailroad bridge
WaterwayChicago Sanitary & Ship Canal
Route SegmentIllinois / Chicago
Route VariantInland Rivers / Chicago or Cal-Sag
State / ProvinceIL
Nearest CityLemont
Mile MarkerRM 300.5
Bridge TypeSwing railroad / does not open
Source Confidencemedium
What Boaters Should Know
Atchison Topeka & Santa Fe Railway Bridge on Chicago Sanitary & Ship Canalnear Lemont, IL; closed clearance about 19.7 ft. Lowest unavoidable Great Loop bridge.
Clearance And Opening Details
Vertical Clearance Closed19.70 ft
Vertical Clearance OpenNot verified
Horizontal Clearance160.00 ft
VHF ChannelNot verified
PhoneNot verified
Last Verified2026-06-08
Verify against current water level / bridge gauge before transit.
Opening / Contact Notes
- Opening Schedule
- Does not open.
- Operator / Contact
- Not verified
Navigation And Regulatory Notes
- Air Draft Notes
- Closed/air-draft clearance: 19.7 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Route-limiting / Critical
- Navigation Notes
- Does not open. Must clear to complete full Loop; no alternate route per AGLCA. Closed/air-draft clearance: 19.7 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Route-limiting / Critical Does not open.
- Regulatory Notes
- Does not open. Must clear to complete full Loop; no alternate route per AGLCA.
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.