US Bridges

US 34 EB over W Main ST

Fair

Knox County, Illinois · 0.3 MI W Il 41 · Structure no. 048007400000000

Built
1976
49 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
182 ft
2 main spans
Daily traffic
9,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 34 EB over W Main ST is a steel continuous stringer/multi-beam or girder carrying US 34 EB over W Main ST in Knox 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 9,100 vehicles a day, roughly 24% of them trucks, projected to reach 4,116 by 2046. The structure is 182 ft (55.5 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 34 EB
CrossesW Main ST
Location0.3 MI W Il 41
RouteU.S. Route 34
CountyKnox County
StateIllinois
Coordinates40.94765, -90.40981
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.5 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length182 ft (55.5 m)
Longest span89 ft (27.1 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,100 (2023)
Projected traffic4,116 by 2046
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 34 EB over W Main ST built?

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

What condition is US 34 EB over W Main ST in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.

How much traffic does US 34 EB over W Main ST carry?

About 9,100 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is US 34 EB over W Main ST?

The structure is 182 ft (55.5 m) long with a longest span of 89 ft (27.1 m) and a deck 42 ft wide.

Who owns US 34 EB over W Main ST?

It is owned by the State Highway Agency.