US Bridges

US 45 over N Br Prairie CR

Fair

Will County, Illinois · 4.7 M S of US 30 · Structure no. 099011800000000

Built
1978
47 years old, rebuilt 2008
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
5,900
2023 count
Owner
State
State Highway Agency

About this bridge

US 45 over N Br Prairie CR is a prestressed concrete box beam or girders - multiple carrying US 45 over N Br Prairie CR in Will County, Illinois. It was built in 1978 and reconstructed in 2008, so it is 47 years old, older 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 5,900 vehicles a day, roughly 7% of them trucks, projected to reach 9,000 by 2046. The structure is 45 ft (13.6 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesUS 45
CrossesN Br Prairie CR
Location4.7 M S of US 30
RouteU.S. Route 45
CountyWill County
StateIllinois
Coordinates41.44741, -87.88388
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating47.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length45 ft (13.6 m)
Longest span44 ft (13.3 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,900 (2023)
Projected traffic9,000 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 US 45 over N Br Prairie CR built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2008.

What condition is US 45 over N Br Prairie CR 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 September 2023.

How much traffic does US 45 over N Br Prairie CR carry?

About 5,900 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 45 over N Br Prairie CR?

The structure is 45 ft (13.6 m) long with a longest span of 44 ft (13.3 m) and a deck 42 ft wide.

Who owns US 45 over N Br Prairie CR?

It is owned by the State Highway Agency.