US Bridges

TR 4B over Prairie Fork

Good

Christian County, Illinois · 1 MI NE Harvel · Structure no. 011341000000000

Built
2012
13 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
20
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 4B over Prairie Fork is a prestressed concrete box beam or girders - multiple carrying TR 4B over Prairie Fork in Christian County, Illinois. It was built in 2012, so it is 13 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 20 vehicles a day, projected to reach 20 by 2046. The structure is 61 ft (18.6 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesTR 4B
CrossesPrairie Fork
Location1 MI NE Harvel
RouteCounty Highway 0
Coordinates39.37651, -89.51232
Functional classRural Local

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 inspectionNovember 2023
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

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length61 ft (18.6 m)
Longest span58 ft (17.8 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2021)
Projected traffic20 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 4B over Prairie Fork built?

It was built in 2012, making it 13 years old in 2025.

What condition is TR 4B over Prairie Fork 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 November 2023.

How much traffic does TR 4B over Prairie Fork carry?

About 20 vehicles per day (2021 count).

How long is TR 4B over Prairie Fork?

The structure is 61 ft (18.6 m) long with a longest span of 58 ft (17.8 m) and a deck 24 ft wide.

Who owns TR 4B over Prairie Fork?

It is owned by the Town or Township Highway Agency.