US Bridges

Prairie ST over Cedar Creek

Good

Knox County, Illinois · 200 Blk N. Prairie · Structure no. 048601400000000

Built
1930
95 years old, rebuilt 2002
Condition
Good
inspected October 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
1,200
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Prairie ST over Cedar Creek is a prestressed concrete box beam or girders - multiple carrying Prairie ST over Cedar Creek in Knox County, Illinois. It was built in 1930 and reconstructed in 2002, so it is 95 years old, older 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 1,200 vehicles a day, roughly 3% of them trucks, projected to reach 2,071 by 2046. The structure is 39 ft (11.9 m) long and 64 ft wide.

CarriesPrairie ST
CrossesCedar Creek
Location200 Blk N. Prairie
Coordinates40.95053, -90.36797
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.8 US tons
Inventory rating63.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span38 ft (11.6 m)
Deck width64 ft (19.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2022)
Projected traffic2,071 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$204,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Prairie ST over Cedar Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2002.

What condition is Prairie ST over Cedar 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 October 2022.

How much traffic does Prairie ST over Cedar Creek carry?

About 1,200 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Prairie ST over Cedar Creek?

The structure is 39 ft (11.9 m) long with a longest span of 38 ft (11.6 m) and a deck 64 ft wide.

Who owns Prairie ST over Cedar Creek?

It is owned by the City or Municipal Highway Agency.