US Bridges

TR 421 over Little Vermilion Riv

Fair

Vermilion County, Illinois · 2 MI NW Sidell · Structure no. 092331100000000

Built
1980
45 years old
Condition
Fair
inspected February 2023
Type
Channel Beam
Concrete
Length
76 ft
2 main spans
Daily traffic
20
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 421 over Little Vermilion Riv is a concrete channel beam carrying TR 421 over Little Vermilion Riv in Vermilion County, Illinois. It was built in 1980, so it is 45 years old, younger 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 20 by 2046. The structure is 76 ft (23.2 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTR 421
CrossesLittle Vermilion Riv
Location2 MI NW Sidell
RouteCounty Highway 0
CountyVermilion County
StateIllinois
Coordinates39.92781, -87.85143
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span38 ft (11.6 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic20 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 421 over Little Vermilion Riv built?

It was built in 1980, making it 45 years old in 2025.

What condition is TR 421 over Little Vermilion Riv 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 February 2023.

How much traffic does TR 421 over Little Vermilion Riv carry?

About 20 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is TR 421 over Little Vermilion Riv?

The structure is 76 ft (23.2 m) long with a longest span of 38 ft (11.6 m) and a deck 27 ft wide.

Who owns TR 421 over Little Vermilion Riv?

It is owned by the Town or Township Highway Agency.