US Bridges

TR 46 over Prairie Ck Trib

Fair

Logan County, Illinois · 4.5 MI W 1MI S Harbg · Structure no. 054541800000000

Built
1979
46 years old
Condition
Fair
inspected December 2023
Type
Channel Beam
Concrete
Length
34 ft
1 main span
Daily traffic
20
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 46 over Prairie Ck Trib is a concrete channel beam carrying TR 46 over Prairie Ck Trib in Logan County, Illinois. It was built in 1979, so it is 46 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 21 by 2046. The structure is 34 ft (10.4 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 46
CrossesPrairie Ck Trib
Location4.5 MI W 1MI S Harbg
RouteCounty Highway 0
Coordinates40.23632, -89.52546
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic21 by 2046
Trucks10%
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

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 46 over Prairie Ck Trib built?

It was built in 1979, making it 46 years old in 2025.

What condition is TR 46 over Prairie Ck Trib 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 December 2023.

How much traffic does TR 46 over Prairie Ck Trib carry?

About 20 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is TR 46 over Prairie Ck Trib?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m) and a deck 27 ft wide.

Who owns TR 46 over Prairie Ck Trib?

It is owned by the Town or Township Highway Agency.