US Bridges

Ill 203 NB over SB Ramp to EB 55/70

Good

St. Clair County, Illinois · 0.6 M E E ST Louis · Structure no. 082002500000000

Built
1960
65 years old, rebuilt 1999
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
218 ft
3 main spans
Daily traffic
7,500
2024 count
Owner
State
State Highway Agency

About this bridge

Ill 203 NB over SB Ramp to EB 55/70 is a steel continuous stringer/multi-beam or girder carrying Ill 203 NB over SB Ramp to EB 55/70 in St. Clair County, Illinois. It was built in 1960 and reconstructed in 1999, so it is 65 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,500 vehicles a day, roughly 13% of them trucks, projected to reach 7,676 by 2046. The structure is 218 ft (66.4 m) long and 35 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesIll 203 NB
CrossesSB Ramp to EB 55/70
Location0.6 M E E ST Louis
CountySt. Clair County
StateIllinois
Coordinates38.6475, -90.13157
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length218 ft (66.4 m)
Longest span73 ft (22.3 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2024)
Projected traffic7,676 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$590,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ill 203 NB over SB Ramp to EB 55/70 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1999.

What condition is Ill 203 NB over SB Ramp to EB 55/70 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does Ill 203 NB over SB Ramp to EB 55/70 carry?

About 7,500 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Ill 203 NB over SB Ramp to EB 55/70?

The structure is 218 ft (66.4 m) long with a longest span of 73 ft (22.3 m) and a deck 35 ft wide.

Who owns Ill 203 NB over SB Ramp to EB 55/70?

It is owned by the State Highway Agency.