US Bridges

FAS-806 over Wolf Prairie Ditch

Fair

Lawrence County, Illinois · 6 MI S Bridgeport · Structure no. 051301200000000

Built
1955
70 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
750
2021 count
Owner
County
County Highway Agency

About this bridge

FAS-806 over Wolf Prairie Ditch is a concrete continuous slab carrying FAS-806 over Wolf Prairie Ditch in Lawrence County, Illinois. It was built in 1955, so it is 70 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 750 vehicles a day, roughly 13% of them trucks, projected to reach 758 by 2046. The structure is 62 ft (18.9 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAS-806
CrossesWolf Prairie Ditch
Location6 MI S Bridgeport
RouteCounty Highway 0
CountyLawrence County
StateIllinois
Coordinates38.61588, -87.75937
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating39.7 US tons
Inventory rating23.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length62 ft (18.9 m)
Longest span23 ft (7 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2021)
Projected traffic758 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 FAS-806 over Wolf Prairie Ditch built?

It was built in 1955, making it 70 years old in 2025.

What condition is FAS-806 over Wolf Prairie Ditch 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 January 2024.

How much traffic does FAS-806 over Wolf Prairie Ditch carry?

About 750 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is FAS-806 over Wolf Prairie Ditch?

The structure is 62 ft (18.9 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns FAS-806 over Wolf Prairie Ditch?

It is owned by the County Highway Agency.