US Bridges

I-57 NB & SB over Prairie Creek

Fair

Iroquois County, Illinois · 4.14 M. S. of Il 116 · Structure no. 038202100000000

Built
2015
10 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
196 ft
2 main spans
Daily traffic
18,100
2023 count
Owner
State
State Highway Agency

About this bridge

I-57 NB & SB over Prairie Creek is a concrete continuous culvert carrying I-57 NB & SB over Prairie Creek in Iroquois County, Illinois. It was built in 2015, so it is 10 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 18,100 vehicles a day, roughly 34% of them trucks, projected to reach 17,069 by 2046. The structure is 196 ft (59.6 m) long and 169 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-57 NB & SB
CrossesPrairie Creek
Location4.14 M. S. of Il 116
RouteInterstate 57
CountyIroquois County
StateIllinois
Coordinates40.83146, -87.99759
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating107.1 US tons
Inventory rating70 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckOther
Main spans2
Design loadHS 20
Structure length196 ft (59.6 m)
Longest span98 ft (30 m)
Deck width169 ft (51.6 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,100 (2023)
Projected traffic17,069 by 2046
Trucks34%
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 I-57 NB & SB over Prairie Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is I-57 NB & SB over Prairie 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-57 NB & SB over Prairie Creek carry?

About 18,100 vehicles per day (2023 count), of which roughly 34% are trucks.

How long is I-57 NB & SB over Prairie Creek?

The structure is 196 ft (59.6 m) long with a longest span of 98 ft (30 m) and a deck 169 ft wide.

Who owns I-57 NB & SB over Prairie Creek?

It is owned by the State Highway Agency.