US Bridges

US 45 over Prairie Creek

Good

Iroquois County, Illinois · 2.35 M N of US 24 · Structure no. 038022500000000

Built
2020
5 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
86 ft
1 main span
Daily traffic
1,350
2023 count
Owner
State
State Highway Agency

About this bridge

US 45 over Prairie Creek is a steel stringer/multi-beam or girder carrying US 45 over Prairie Creek in Iroquois County, Illinois. It was built in 2020, so it is 5 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,350 vehicles a day, roughly 9% of them trucks, projected to reach 1,414 by 2046. The structure is 86 ft (26.1 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUS 45
CrossesPrairie Creek
Location2.35 M N of US 24
RouteU.S. Route 45
CountyIroquois County
StateIllinois
Coordinates40.80051, -87.97883
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length86 ft (26.1 m)
Longest span82 ft (25.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2023)
Projected traffic1,414 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 US 45 over Prairie Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is US 45 over Prairie 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 January 2023.

How much traffic does US 45 over Prairie Creek carry?

About 1,350 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 45 over Prairie Creek?

The structure is 86 ft (26.1 m) long with a longest span of 82 ft (25.1 m) and a deck 35 ft wide.

Who owns US 45 over Prairie Creek?

It is owned by the State Highway Agency.