US Bridges

County Line Rd-Ch over FAI 64

Good

Clinton County, Illinois · ST Clair CO Line · Structure no. 014003800000000

Built
1972
53 years old, rebuilt 2010
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
194 ft
2 main spans
Daily traffic
625
2020 count
Owner
State
State Highway Agency

About this bridge

County Line Rd-Ch over FAI 64 is a steel continuous stringer/multi-beam or girder carrying County Line Rd-Ch over FAI 64 in Clinton County, Illinois. It was built in 1972 and reconstructed in 2010, so it is 53 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 625 vehicles a day, roughly 10% of them trucks, projected to reach 688 by 2046. The structure is 194 ft (59.1 m) long and 32 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesCounty Line Rd-Ch
CrossesFAI 64
LocationST Clair CO Line
RouteCounty Highway 0
CountyClinton County
StateIllinois
Coordinates38.51904, -89.70506
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 15
Structure length194 ft (59.1 m)
Longest span96 ft (29.3 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic625 (2020)
Projected traffic688 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed18 mi (29 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Line Rd-Ch over FAI 64 built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2010.

What condition is County Line Rd-Ch over FAI 64 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 2025.

How much traffic does County Line Rd-Ch over FAI 64 carry?

About 625 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County Line Rd-Ch over FAI 64?

The structure is 194 ft (59.1 m) long with a longest span of 96 ft (29.3 m) and a deck 32 ft wide.

Who owns County Line Rd-Ch over FAI 64?

It is owned by the State Highway Agency.