US Bridges

Lake Dr/ FAU 9185 over FAI 255/HARDING Dtch

Good

St. Clair County, Illinois · .3 MI E Il 111 · Structure no. 082023400000000

Built
1981
44 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
601 ft
5 main spans
Daily traffic
3,750
2023 count
Owner
State
State Highway Agency

About this bridge

Lake Dr/ FAU 9185 over FAI 255/HARDING Dtch is a steel continuous stringer/multi-beam or girder carrying Lake Dr/ FAU 9185 over FAI 255/HARDING Dtch in St. Clair County, Illinois. It was built in 1981, so it is 44 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,750 vehicles a day, roughly 3% of them trucks, projected to reach 4,697 by 2046. The structure is 601 ft (183.2 m) long and 42 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesLake Dr/ FAU 9185
CrossesFAI 255/HARDING Dtch
Location.3 MI E Il 111
CountySt. Clair County
StateIllinois
Coordinates38.59562, -90.08921
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length601 ft (183.2 m)
Longest span149 ft (45.4 m)
Deck width42 ft (12.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2023)
Projected traffic4,697 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

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 Lake Dr/ FAU 9185 over FAI 255/HARDING Dtch built?

It was built in 1981, making it 44 years old in 2025.

What condition is Lake Dr/ FAU 9185 over FAI 255/HARDING Dtch 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 January 2023.

How much traffic does Lake Dr/ FAU 9185 over FAI 255/HARDING Dtch carry?

About 3,750 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Lake Dr/ FAU 9185 over FAI 255/HARDING Dtch?

The structure is 601 ft (183.2 m) long with a longest span of 149 ft (45.4 m) and a deck 42 ft wide.

Who owns Lake Dr/ FAU 9185 over FAI 255/HARDING Dtch?

It is owned by the State Highway Agency.