US Bridges

Oak Run Road over Trib to Spoon Lake

Good

Knox County, Illinois · NE-4-T11NR3E · Structure no. 048336600000000

Built
1998
27 years old
Condition
Good
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
425
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Oak Run Road over Trib to Spoon Lake is a prestressed concrete box beam or girders - multiple carrying Oak Run Road over Trib to Spoon Lake in Knox County, Illinois. It was built in 1998, so it is 27 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 425 vehicles a day, roughly 16% of them trucks, projected to reach 328 by 2046. The structure is 36 ft (10.9 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesOak Run Road
CrossesTrib to Spoon Lake
LocationNE-4-T11NR3E
RouteCounty Highway 0
Coordinates40.97284, -90.15624
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length36 ft (10.9 m)
Longest span34 ft (10.4 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic425 (2022)
Projected traffic328 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Oak Run Road over Trib to Spoon Lake built?

It was built in 1998, making it 27 years old in 2025.

What condition is Oak Run Road over Trib to Spoon Lake 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 2024.

How much traffic does Oak Run Road over Trib to Spoon Lake carry?

About 425 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Oak Run Road over Trib to Spoon Lake?

The structure is 36 ft (10.9 m) long with a longest span of 34 ft (10.4 m) and a deck 28 ft wide.

Who owns Oak Run Road over Trib to Spoon Lake?

It is owned by the Town or Township Highway Agency.