US Bridges

FAS 331(CH 10) over Middlefork Vermilion

Good

Vermilion County, Illinois · .5 MI S of Potomac · Structure no. 092330100000000

Built
1979
46 years old
Condition
Good
inspected February 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
378 ft
5 main spans
Daily traffic
450
2023 count
Owner
County
County Highway Agency

About this bridge

FAS 331(CH 10) over Middlefork Vermilion is a steel stringer/multi-beam or girder carrying FAS 331(CH 10) over Middlefork Vermilion in Vermilion County, Illinois. It was built in 1979, so it is 46 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 450 vehicles a day, roughly 8% of them trucks, projected to reach 379 by 2046. The structure is 378 ft (115.2 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesFAS 331(CH 10)
CrossesMiddlefork Vermilion
Location.5 MI S of Potomac
RouteCounty Highway 0
CountyVermilion County
StateIllinois
Coordinates40.29834, -87.8004
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length378 ft (115.2 m)
Longest span82 ft (25 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2023)
Projected traffic379 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 331(CH 10) over Middlefork Vermilion built?

It was built in 1979, making it 46 years old in 2025.

What condition is FAS 331(CH 10) over Middlefork Vermilion 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 2021.

How much traffic does FAS 331(CH 10) over Middlefork Vermilion carry?

About 450 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is FAS 331(CH 10) over Middlefork Vermilion?

The structure is 378 ft (115.2 m) long with a longest span of 82 ft (25 m) and a deck 32 ft wide.

Who owns FAS 331(CH 10) over Middlefork Vermilion?

It is owned by the County Highway Agency.