US Bridges

TR 309 over Middle Fork Sugar CR

Fair

McLean County, Illinois · 5.5 MI NW Shirley · Structure no. 057390000000000

Built
1965
60 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
55 ft
3 main spans
Daily traffic
25
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 309 over Middle Fork Sugar CR is a concrete continuous slab carrying TR 309 over Middle Fork Sugar CR in McLean County, Illinois. It was built in 1965, so it is 60 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 5 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 25 vehicles a day, roughly 8% of them trucks, projected to reach 25 by 2046. The structure is 55 ft (16.9 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR 309
CrossesMiddle Fork Sugar CR
Location5.5 MI NW Shirley
RouteCounty Highway 0
CountyMcLean County
StateIllinois
Coordinates40.46528, -89.14617
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating42.9 US tons
Inventory rating25.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length55 ft (16.9 m)
Longest span20 ft (6.2 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic25 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 309 over Middle Fork Sugar CR built?

It was built in 1965, making it 60 years old in 2025.

What condition is TR 309 over Middle Fork Sugar CR 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 September 2023.

How much traffic does TR 309 over Middle Fork Sugar CR carry?

About 25 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is TR 309 over Middle Fork Sugar CR?

The structure is 55 ft (16.9 m) long with a longest span of 20 ft (6.2 m) and a deck 26 ft wide.

Who owns TR 309 over Middle Fork Sugar CR?

It is owned by the Town or Township Highway Agency.