US Bridges

Il 29 over Big Bureau Creek

Fair

Bureau County, Illinois · 0.1 MI S JCT Ill 26 · Structure no. 006008400000000

Built
1964
61 years old, rebuilt 2000
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
218 ft
3 main spans
Daily traffic
750
2023 count
Owner
State
State Highway Agency

About this bridge

Il 29 over Big Bureau Creek is a steel continuous stringer/multi-beam or girder carrying Il 29 over Big Bureau Creek in Bureau County, Illinois. It was built in 1964 and reconstructed in 2000, so it is 61 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 750 vehicles a day, roughly 15% of them trucks, projected to reach 1,263 by 2046. The structure is 218 ft (66.4 m) long and 39 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIl 29
CrossesBig Bureau Creek
Location0.1 MI S JCT Ill 26
RouteState Highway 29
CountyBureau County
StateIllinois
Coordinates41.27919, -89.38299
Functional classRural Major Collector

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating49.6 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 span82 ft (25.1 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2023)
Projected traffic1,263 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 29 over Big Bureau Creek built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2000.

What condition is Il 29 over Big Bureau Creek 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 January 2025.

How much traffic does Il 29 over Big Bureau Creek carry?

About 750 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Il 29 over Big Bureau Creek?

The structure is 218 ft (66.4 m) long with a longest span of 82 ft (25.1 m) and a deck 39 ft wide.

Who owns Il 29 over Big Bureau Creek?

It is owned by the State Highway Agency.