US Bridges

US 6 FAP 623 over Little Vermilion R

Fair

LaSalle County, Illinois · 2.15 MI E of Il 251 · Structure no. 050009400000000

Built
1966
59 years old, rebuilt 2007
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
292 ft
3 main spans
Daily traffic
9,050
2023 count
Owner
State
State Highway Agency

About this bridge

US 6 FAP 623 over Little Vermilion R is a steel continuous stringer/multi-beam or girder carrying US 6 FAP 623 over Little Vermilion R in LaSalle County, Illinois. It was built in 1966 and reconstructed in 2007, so it is 59 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 9,050 vehicles a day, roughly 16% of them trucks, projected to reach 9,949 by 2046. The structure is 292 ft (89 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesUS 6 FAP 623
CrossesLittle Vermilion R
Location2.15 MI E of Il 251
RouteU.S. Route 6
Coordinates41.33331, -89.08188
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating52.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length292 ft (89 m)
Longest span112 ft (34.2 m)
Deck width40 ft (12.2 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,050 (2023)
Projected traffic9,949 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 6 FAP 623 over Little Vermilion R built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2007.

What condition is US 6 FAP 623 over Little Vermilion R 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 2024.

How much traffic does US 6 FAP 623 over Little Vermilion R carry?

About 9,050 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US 6 FAP 623 over Little Vermilion R?

The structure is 292 ft (89 m) long with a longest span of 112 ft (34.2 m) and a deck 40 ft wide.

Who owns US 6 FAP 623 over Little Vermilion R?

It is owned by the State Highway Agency.