US Bridges

Back Bone Rd(fas 5 over Vermilion River

Fair

Vermilion County, Illinois · 2.0 MI SE Danville · Structure no. 092328400000000

Built
1975
50 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
389 ft
5 main spans
Daily traffic
775
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Back Bone Rd(fas 5 over Vermilion River is a steel continuous stringer/multi-beam or girder carrying Back Bone Rd(fas 5 over Vermilion River in Vermilion County, Illinois. It was built in 1975, so it is 50 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 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 775 vehicles a day, roughly 1% of them trucks, projected to reach 808 by 2046. The structure is 389 ft (118.6 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesBack Bone Rd(fas 5
CrossesVermilion River
Location2.0 MI SE Danville
Coordinates40.08485, -87.59386
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length389 ft (118.6 m)
Longest span84 ft (25.6 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic775 (2023)
Projected traffic808 by 2046
Trucks1%
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 Back Bone Rd(fas 5 over Vermilion River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Back Bone Rd(fas 5 over Vermilion River 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 January 2024.

How much traffic does Back Bone Rd(fas 5 over Vermilion River carry?

About 775 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Back Bone Rd(fas 5 over Vermilion River?

The structure is 389 ft (118.6 m) long with a longest span of 84 ft (25.6 m) and a deck 32 ft wide.

Who owns Back Bone Rd(fas 5 over Vermilion River?

It is owned by the Town or Township Highway Agency.