US Bridges

TR 312 over Flat Creek

Good

Fayette County, Illinois · 5 Mi. Ese Shobonier · Structure no. 026347500000000

Built
2021
4 years old
Condition
Good
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
100
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 312 over Flat Creek is a prestressed concrete box beam or girders - multiple carrying TR 312 over Flat Creek in Fayette County, Illinois. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 14% of them trucks, projected to reach 102 by 2046. The structure is 80 ft (24.4 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR 312
CrossesFlat Creek
Location5 Mi. Ese Shobonier
RouteCounty Highway 0
Coordinates38.83171, -88.99528
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating51.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length80 ft (24.4 m)
Longest span77 ft (23.6 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic102 by 2046
Trucks14%
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 312 over Flat Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is TR 312 over Flat 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 February 2025.

How much traffic does TR 312 over Flat Creek carry?

About 100 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is TR 312 over Flat Creek?

The structure is 80 ft (24.4 m) long with a longest span of 77 ft (23.6 m) and a deck 24 ft wide.

Who owns TR 312 over Flat Creek?

It is owned by the Town or Township Highway Agency.