US Bridges

FAI 172 over Austin Creek

Fair

Adams County, Illinois · 3.0MI N I-172/IL 57 · Structure no. 001200600000000

Built
1982
43 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
9,750
2023 count
Owner
State
State Highway Agency

About this bridge

FAI 172 over Austin Creek is a concrete culvert carrying FAI 172 over Austin Creek in Adams County, Illinois. It was built in 1982, so it is 43 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 9,750 vehicles a day, roughly 13% of them trucks, projected to reach 9,898 by 2046. The structure is 22 ft (6.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAI 172
CrossesAustin Creek
Location3.0MI N I-172/IL 57
RouteInterstate 172
Coordinates39.83039, -91.30457
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,750 (2023)
Projected traffic9,898 by 2046
Trucks13%
Lanes on structure4
Traffic directionTwo-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 FAI 172 over Austin Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is FAI 172 over Austin 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 July 2023.

How much traffic does FAI 172 over Austin Creek carry?

About 9,750 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FAI 172 over Austin Creek?

The structure is 22 ft (6.8 m) long with a longest span of 10 ft (3 m).

Who owns FAI 172 over Austin Creek?

It is owned by the State Highway Agency.