US Bridges

FAU 6434/CH 34 over I-55

Poor

McLean County, Illinois · East of Shirley · Structure no. 057016100000000

Built
1976
49 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
270 ft
2 main spans
Daily traffic
1,025
2024 count
Owner
State
State Highway Agency

About this bridge

FAU 6434/CH 34 over I-55 is a steel continuous stringer/multi-beam or girder carrying FAU 6434/CH 34 over I-55 in McLean County, Illinois. It was built in 1976, so it is 49 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,025 vehicles a day, roughly 14% of them trucks, projected to reach 960 by 2046. The structure is 270 ft (82.3 m) long and 68 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesFAU 6434/CH 34
CrossesI-55
LocationEast of Shirley
CountyMcLean County
StateIllinois
Coordinates40.40819, -89.05392
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length270 ft (82.3 m)
Longest span106 ft (32.3 m)
Deck width68 ft (20.7 m)
Roadway width48 ft (14.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,025 (2024)
Projected traffic960 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 6434/CH 34 over I-55 built?

It was built in 1976, making it 49 years old in 2025.

What condition is FAU 6434/CH 34 over I-55 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does FAU 6434/CH 34 over I-55 carry?

About 1,025 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is FAU 6434/CH 34 over I-55?

The structure is 270 ft (82.3 m) long with a longest span of 106 ft (32.3 m) and a deck 68 ft wide.

Who owns FAU 6434/CH 34 over I-55?

It is owned by the State Highway Agency.