US Bridges

TR 124 over Flat Branch

Good

Shelby County, Illinois · 7.0 MI E Assumption · Structure no. 087502600000000

Built
1951
74 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
50
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 124 over Flat Branch is a concrete culvert carrying TR 124 over Flat Branch in Shelby County, Illinois. It was built in 1951, so it is 74 years old, older 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 50 vehicles a day, roughly 6% of them trucks, projected to reach 76 by 2046. The structure is 33 ft (10.2 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesTR 124
CrossesFlat Branch
Location7.0 MI E Assumption
RouteCounty Highway 0
Coordinates39.52164, -88.9187
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length33 ft (10.2 m)
Longest span12 ft (3.7 m)
Deck width26 ft (8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic76 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 124 over Flat Branch built?

It was built in 1951, making it 74 years old in 2025.

What condition is TR 124 over Flat Branch 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 April 2023.

How much traffic does TR 124 over Flat Branch carry?

About 50 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is TR 124 over Flat Branch?

The structure is 33 ft (10.2 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns TR 124 over Flat Branch?

It is owned by the Town or Township Highway Agency.