Low clearance bridges in Alexander County, Illinois

5 spots where an interstate or US highway in Alexander County has less than 16 ft of clearance, lowest first. The lowest is 14 ft 6 in on US-51, 1st Ovrhead Cairo. 2 are under 15 ft.

Posted signs and your permit come first. These are the clearances Illinois reported to the federal National Bridge Inventory in 2025. Repaving, snow and new work can lower them.

Map of Alexander County, Illinois with a pin on each low spot.
Hover a pin to read it, tap it to find it in the list. © Mapbox © OpenStreetMap
ClearanceWhereHighway
14 ft 6 inUnder ICG Railroad · 1st Ovrhead Cairo · MapUS-51
14 ft 9 inUnder Penn Central · 3rd Overhead Cairo · MapUS-51
15 ft 1 inUnder Cnic Railroad · 0.5 mi E I-57 · MapUS-51
15 ft 8 inUnder I-57 SB · Cairo Interchange · MapUS-51
15 ft 10 inUnder I-57 NB · Cairo Interchange · MapUS-51