US Bridges

I-180 EB over IL29(SBI29A)&IAIS RR

Fair

Bureau County, Illinois · 2 MI SW Bureau Jct. · Structure no. 006005700000000

Built
1968
57 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
393 ft
4 main spans
Daily traffic
1,350
2023 count
Owner
State
State Highway Agency

About this bridge

I-180 EB over IL29(SBI29A)&IAIS RR is a steel continuous stringer/multi-beam or girder carrying I-180 EB over IL29(SBI29A)&IAIS RR in Bureau County, Illinois. It was built in 1968, so it is 57 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 5 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 1,350 vehicles a day, roughly 32% of them trucks, projected to reach 1,263 by 2046. The structure is 393 ft (119.8 m) long and 67 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesI-180 EB
CrossesIL29(SBI29A)&IAIS RR
Location2 MI SW Bureau Jct.
RouteInterstate 180
CountyBureau County
StateIllinois
Coordinates41.26478, -89.39132
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.5 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length393 ft (119.8 m)
Longest span115 ft (35 m)
Deck width67 ft (20.3 m)
Roadway width63 ft (19.2 m)
Vertical clearance over deck22 ft (6.8 m)

Traffic and service

Average daily traffic1,350 (2023)
Projected traffic1,263 by 2046
Trucks32%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-180 EB over IL29(SBI29A)&IAIS RR built?

It was built in 1968, making it 57 years old in 2025.

What condition is I-180 EB over IL29(SBI29A)&IAIS RR 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 February 2024.

How much traffic does I-180 EB over IL29(SBI29A)&IAIS RR carry?

About 1,350 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is I-180 EB over IL29(SBI29A)&IAIS RR?

The structure is 393 ft (119.8 m) long with a longest span of 115 ft (35 m) and a deck 67 ft wide.

Who owns I-180 EB over IL29(SBI29A)&IAIS RR?

It is owned by the State Highway Agency.