US Bridges

Ill 151 over Austin Creek

Poor

Jackson County, Illinois · 0.3 MI N of Ill 3 · Structure no. 039003500000000

Built
1935
90 years old, rebuilt 1969
Condition
Poor
inspected January 2025
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
750
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 151 over Austin Creek is a concrete slab carrying Ill 151 over Austin Creek in Jackson County, Illinois. It was built in 1935 and reconstructed in 1969, so it is 90 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 750 vehicles a day, roughly 20% of them trucks, projected to reach 732 by 2046. The structure is 30 ft (9.1 m) long and 37 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesIll 151
CrossesAustin Creek
Location0.3 MI N of Ill 3
RouteState Highway 151
Coordinates37.79088, -89.53002
Functional classRural Major Collector

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
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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating62.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2023)
Projected traffic732 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 Ill 151 over Austin Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1969.

What condition is Ill 151 over Austin Creek 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 January 2025.

How much traffic does Ill 151 over Austin Creek carry?

About 750 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Ill 151 over Austin Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 37 ft wide.

Who owns Ill 151 over Austin Creek?

It is owned by the State Highway Agency.