US Bridges

Ch 3(FAS 642) over Lake Shelbyville

Fair

Shelby County, Illinois · 2 MI E of Findley · Structure no. 087300100000000

Built
1967
58 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
3,172 ft
42 main spans
Daily traffic
1,800
2024 count
Owner
County
County Highway Agency

About this bridge

Ch 3(FAS 642) over Lake Shelbyville is a prestressed concrete stringer/multi-beam or girder carrying Ch 3(FAS 642) over Lake Shelbyville in Shelby County, Illinois. It was built in 1967, so it is 58 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 1,800 vehicles a day, roughly 13% of them trucks, projected to reach 1,869 by 2046. The structure is 3,172 ft (966.7 m) long and 28 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

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CarriesCh 3(FAS 642)
CrossesLake Shelbyville
Location2 MI E of Findley
RouteCounty Highway 0
CountyShelby County
StateIllinois
Coordinates39.52108, -88.70825
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans42
Design loadHS 20
Structure length3,172 ft (966.7 m)
Longest span75 ft (23 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2024)
Projected traffic1,869 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Ch 3(FAS 642) over Lake Shelbyville built?

It was built in 1967, making it 58 years old in 2025.

What condition is Ch 3(FAS 642) over Lake Shelbyville 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 May 2024.

How much traffic does Ch 3(FAS 642) over Lake Shelbyville carry?

About 1,800 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Ch 3(FAS 642) over Lake Shelbyville?

The structure is 3,172 ft (966.7 m) long with a longest span of 75 ft (23 m) and a deck 28 ft wide.

Who owns Ch 3(FAS 642) over Lake Shelbyville?

It is owned by the County Highway Agency.