US Bridges

Il 57 over Austin Creek

Good

Adams County, Illinois · .9M N I-172 · Structure no. 001201200000000

Built
1995
30 years old
Condition
Good
inspected June 2021
Type
Culvert
Concrete Continuous
Length
61 ft
4 main spans
Daily traffic
4,000
2023 count
Owner
State
State Highway Agency

About this bridge

Il 57 over Austin Creek is a concrete continuous culvert carrying Il 57 over Austin Creek in Adams County, Illinois. It was built in 1995, so it is 30 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,000 vehicles a day, roughly 17% of them trucks, projected to reach 4,192 by 2046. The structure is 61 ft (18.5 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIl 57
CrossesAustin Creek
Location.9M N I-172
RouteState Highway 57
Coordinates39.79879, -91.31989
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20
Structure length61 ft (18.5 m)
Longest span14 ft (4.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2023)
Projected traffic4,192 by 2046
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 57 over Austin Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Il 57 over Austin Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2021.

How much traffic does Il 57 over Austin Creek carry?

About 4,000 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is Il 57 over Austin Creek?

The structure is 61 ft (18.5 m) long with a longest span of 14 ft (4.2 m).

Who owns Il 57 over Austin Creek?

It is owned by the State Highway Agency.