41.81000000, -87.80400000
Fixed bridge
WaterwayChicago Sanitary & Ship Canal
Route SegmentIllinois / Chicago
Route VariantInland Rivers / Chicago or Cal-Sag
State / ProvinceIL
Nearest CityLyons / Forest View
Mile MarkerRM 314.0
Bridge TypeBascule listed does not open
Source Confidencemedium
What Boaters Should Know
Southern Harlem Avenue Bridge on Chicago Sanitary & Ship Canalnear Lyons / Forest View, IL; closed clearance about 24.9 ft. Low fixed/nonopening bridge.
Clearance And Opening Details
Vertical Clearance Closed24.90 ft
Vertical Clearance OpenNot verified
Horizontal Clearance140.00 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 per USACE table.
- Operator / Contact
- Not verified
Navigation And Regulatory Notes
- Air Draft Notes
- Closed/air-draft clearance: 24.9 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Low / Timing-sensitive
- Navigation Notes
- Does not open per USACE table. Verify current status; table lists bascule but open clearance as does not open. Closed/air-draft clearance: 24.9 ft. Datum/reference: Low Operating Level / Flat Pool; NGVD 1929. Clearance band: Low / Timing-sensitive Does not open per USACE table.
- Regulatory Notes
- Does not open per USACE table. Verify current status; table lists bascule but open clearance as does not open.
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.