US Bridges

TR 9 over Prairie Ck

Poor

Logan County, Illinois · 1 MI W Emden · Structure no. 054541200000000

Built
1964
61 years old
Condition
Poor
inspected December 2024
Type
Slab
Concrete Continuous
Length
71 ft
3 main spans
Daily traffic
75
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 9 over Prairie Ck is a concrete continuous slab carrying TR 9 over Prairie Ck in Logan County, Illinois. It was built in 1964, so it is 61 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 75 vehicles a day, roughly 13% of them trucks, projected to reach 158 by 2046. The structure is 71 ft (21.6 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 9
CrossesPrairie Ck
Location1 MI W Emden
RouteCounty Highway 0
Coordinates40.29229, -89.50426
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating33.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length71 ft (21.6 m)
Longest span28 ft (8.5 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic158 by 2046
Trucks13%
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 9 over Prairie Ck built?

It was built in 1964, making it 61 years old in 2025.

What condition is TR 9 over Prairie Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does TR 9 over Prairie Ck carry?

About 75 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is TR 9 over Prairie Ck?

The structure is 71 ft (21.6 m) long with a longest span of 28 ft (8.5 m) and a deck 27 ft wide.

Who owns TR 9 over Prairie Ck?

It is owned by the Town or Township Highway Agency.