US Bridges

FAS 642(CH 19) over Flat Branch

Fair

Shelby County, Illinois · 7.5 MI E Assumption · Structure no. 087500200000000

Built
1951
74 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
35 ft
3 main spans
Daily traffic
850
2024 count
Owner
County
County Highway Agency

About this bridge

FAS 642(CH 19) over Flat Branch is a concrete culvert carrying FAS 642(CH 19) 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 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 850 vehicles a day, roughly 16% of them trucks, projected to reach 960 by 2046. The structure is 35 ft (10.6 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFAS 642(CH 19)
CrossesFlat Branch
Location7.5 MI E Assumption
RouteCounty Highway 0
CountyShelby County
StateIllinois
Coordinates39.52168, -88.90825
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 length35 ft (10.6 m)
Longest span13 ft (3.9 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2024)
Projected traffic960 by 2046
Trucks16%
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

OwnerCounty Highway Agency
Maintained byCounty 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 FAS 642(CH 19) over Flat Branch built?

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

What condition is FAS 642(CH 19) over Flat Branch 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 March 2023.

How much traffic does FAS 642(CH 19) over Flat Branch carry?

About 850 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is FAS 642(CH 19) over Flat Branch?

The structure is 35 ft (10.6 m) long with a longest span of 13 ft (3.9 m) and a deck 29 ft wide.

Who owns FAS 642(CH 19) over Flat Branch?

It is owned by the County Highway Agency.