US Bridges

US 24/IL 100 over Spoon River

Fair

Fulton County, Illinois · N of Duncan Mills · Structure no. 029006800000000

Built
2006
19 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
718 ft
4 main spans
Daily traffic
1,900
2023 count
Owner
State
State Highway Agency

About this bridge

US 24/IL 100 over Spoon River is a steel continuous stringer/multi-beam or girder carrying US 24/IL 100 over Spoon River in Fulton County, Illinois. It was built in 2006, so it is 19 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 1,900 vehicles a day, roughly 15% of them trucks, projected to reach 2,273 by 2046. The structure is 718 ft (218.7 m) long and 43 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesUS 24/IL 100
CrossesSpoon River
LocationN of Duncan Mills
RouteU.S. Route 24
CountyFulton County
StateIllinois
Coordinates40.34041, -90.1894
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84.3 US tons
Inventory rating50.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length718 ft (218.7 m)
Longest span237 ft (72.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2023)
Projected traffic2,273 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 US 24/IL 100 over Spoon River built?

It was built in 2006, making it 19 years old in 2025.

What condition is US 24/IL 100 over Spoon River 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 October 2023.

How much traffic does US 24/IL 100 over Spoon River carry?

About 1,900 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is US 24/IL 100 over Spoon River?

The structure is 718 ft (218.7 m) long with a longest span of 237 ft (72.2 m) and a deck 43 ft wide.

Who owns US 24/IL 100 over Spoon River?

It is owned by the State Highway Agency.