US Bridges

FAP-823 (ILL-15) over White Oak Slough

Fair

Wayne County, Illinois · 2 MI W Edwards CO LN · Structure no. 096006100000000

Built
1982
43 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
347 ft
6 main spans
Daily traffic
2,500
2023 count
Owner
State
State Highway Agency

About this bridge

FAP-823 (ILL-15) over White Oak Slough is a steel continuous stringer/multi-beam or girder carrying FAP-823 (ILL-15) over White Oak Slough in Wayne County, Illinois. It was built in 1982, so it is 43 years old, younger 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 6 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 2,500 vehicles a day, roughly 8% of them trucks, projected to reach 2,652 by 2046. The structure is 347 ft (105.8 m) long and 35 ft wide. If it were closed, the detour would be 54.1 mi (87 km).

Location

Open in Google Maps
CarriesFAP-823 (ILL-15)
CrossesWhite Oak Slough
Location2 MI W Edwards CO LN
RouteState Highway 15
CountyWayne County
StateIllinois
Coordinates38.37861, -88.18936
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length347 ft (105.8 m)
Longest span66 ft (20.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2023)
Projected traffic2,652 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed54.1 mi (87 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP-823 (ILL-15) over White Oak Slough built?

It was built in 1982, making it 43 years old in 2025.

What condition is FAP-823 (ILL-15) over White Oak Slough 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 December 2024.

How much traffic does FAP-823 (ILL-15) over White Oak Slough carry?

About 2,500 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is FAP-823 (ILL-15) over White Oak Slough?

The structure is 347 ft (105.8 m) long with a longest span of 66 ft (20.1 m) and a deck 35 ft wide.

Who owns FAP-823 (ILL-15) over White Oak Slough?

It is owned by the State Highway Agency.