US Bridges

I-39/US 51 SB over Bailey Creek

Fair

LaSalle County, Illinois · 0.49 MI S of Ch 54 · Structure no. 050020500000000

Built
1989
36 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
9,700
2023 count
Owner
State
State Highway Agency

About this bridge

I-39/US 51 SB over Bailey Creek is a prestressed concrete stringer/multi-beam or girder carrying I-39/US 51 SB over Bailey Creek in LaSalle County, Illinois. It was built in 1989, so it is 36 years old, younger 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 9,700 vehicles a day, roughly 36% of them trucks, projected to reach 9,494 by 2046. The structure is 95 ft (28.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-39/US 51 SB
CrossesBailey Creek
Location0.49 MI S of Ch 54
RouteInterstate 39
CountyLaSalle County
StateIllinois
Coordinates41.21373, -89.07777
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
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.9 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length95 ft (28.9 m)
Longest span90 ft (27.3 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,700 (2023)
Projected traffic9,494 by 2046
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-39/US 51 SB over Bailey Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is I-39/US 51 SB over Bailey 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 March 2023.

How much traffic does I-39/US 51 SB over Bailey Creek carry?

About 9,700 vehicles per day (2023 count), of which roughly 36% are trucks.

How long is I-39/US 51 SB over Bailey Creek?

The structure is 95 ft (28.9 m) long with a longest span of 90 ft (27.3 m) and a deck 43 ft wide.

Who owns I-39/US 51 SB over Bailey Creek?

It is owned by the State Highway Agency.