US Bridges

Oak Run Road-Tr 50 over Spoon Lake Overflow

Fair

Knox County, Illinois · SE-11-T11NR3E · Structure no. 048328100000000

Built
1970
55 years old
Condition
Fair
inspected February 2023
Type
Channel Beam
Concrete
Length
36 ft
1 main span
Daily traffic
375
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Oak Run Road-Tr 50 over Spoon Lake Overflow is a concrete channel beam carrying Oak Run Road-Tr 50 over Spoon Lake Overflow in Knox County, Illinois. It was built in 1970, so it is 55 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 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 375 vehicles a day, roughly 18% of them trucks, projected to reach 354 by 2046. The structure is 36 ft (11 m) long and 34 ft wide.

CarriesOak Run Road-Tr 50
CrossesSpoon Lake Overflow
LocationSE-11-T11NR3E
RouteCounty Highway 0
Coordinates40.95059, -90.12724
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width34 ft (10.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2022)
Projected traffic354 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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-Tr 50 over Spoon Lake Overflow built?

It was built in 1970, making it 55 years old in 2025.

What condition is Oak Run Road-Tr 50 over Spoon Lake Overflow 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 February 2023.

How much traffic does Oak Run Road-Tr 50 over Spoon Lake Overflow carry?

About 375 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Oak Run Road-Tr 50 over Spoon Lake Overflow?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 34 ft wide.

Who owns Oak Run Road-Tr 50 over Spoon Lake Overflow?

It is owned by the Town or Township Highway Agency.