US Bridges

US 6/FAU 6088/FAP6 over Ill 251 FAP 46

Fair

LaSalle County, Illinois · JCT US 6 & Ill 251 · Structure no. 050002700000000

Built
1960
65 years old, rebuilt 1998
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
149 ft
1 main span
Daily traffic
10,250
2023 count
Owner
State
State Highway Agency

About this bridge

US 6/FAU 6088/FAP6 over Ill 251 FAP 46 is a steel stringer/multi-beam or girder carrying US 6/FAU 6088/FAP6 over Ill 251 FAP 46 in LaSalle County, Illinois. It was built in 1960 and reconstructed in 1998, so it is 65 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 10,250 vehicles a day, roughly 8% of them trucks, projected to reach 12,726 by 2046. The structure is 149 ft (45.3 m) long and 92 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 6/FAU 6088/FAP6
CrossesIll 251 FAP 46
LocationJCT US 6 & Ill 251
RouteU.S. Route 6
CountyLaSalle County
StateIllinois
Coordinates41.32743, -89.12012
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadHS 20
Structure length149 ft (45.3 m)
Longest span70 ft (21.3 m)
Deck width92 ft (28 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,250 (2023)
Projected traffic12,726 by 2046
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 6/FAU 6088/FAP6 over Ill 251 FAP 46 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1998.

What condition is US 6/FAU 6088/FAP6 over Ill 251 FAP 46 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 June 2024.

How much traffic does US 6/FAU 6088/FAP6 over Ill 251 FAP 46 carry?

About 10,250 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 6/FAU 6088/FAP6 over Ill 251 FAP 46?

The structure is 149 ft (45.3 m) long with a longest span of 70 ft (21.3 m) and a deck 92 ft wide.

Who owns US 6/FAU 6088/FAP6 over Ill 251 FAP 46?

It is owned by the State Highway Agency.