US Bridges

FAS 319/CH 8 over Prairie Creek

Good

Iroquois County, Illinois · 2.35 MI N.Of US 24 · Structure no. 038400800000000

Built
1999
26 years old
Condition
Good
inspected April 2021
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
87 ft
3 main spans
Daily traffic
350
2022 count
Owner
County
County Highway Agency

About this bridge

FAS 319/CH 8 over Prairie Creek is a prestressed concrete box beam or girders - multiple carrying FAS 319/CH 8 over Prairie Creek in Iroquois County, Illinois. It was built in 1999, so it is 26 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 350 vehicles a day, roughly 20% of them trucks, projected to reach 354 by 2046. The structure is 87 ft (26.6 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesFAS 319/CH 8
CrossesPrairie Creek
Location2.35 MI N.Of US 24
RouteCounty Highway 0
CountyIroquois County
StateIllinois
Coordinates40.78376, -88.08889
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2021
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 rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length87 ft (26.6 m)
Longest span35 ft (10.7 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2022)
Projected traffic354 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 FAS 319/CH 8 over Prairie Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is FAS 319/CH 8 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 April 2021.

How much traffic does FAS 319/CH 8 over Prairie Creek carry?

About 350 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is FAS 319/CH 8 over Prairie Creek?

The structure is 87 ft (26.6 m) long with a longest span of 35 ft (10.7 m) and a deck 30 ft wide.

Who owns FAS 319/CH 8 over Prairie Creek?

It is owned by the County Highway Agency.