US Bridges

FAS 450-CH 20 over Spoon River

Fair

Fulton County, Illinois · NE-8-T8NR2E · Structure no. 029320800000000

Built
1984
41 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
401 ft
3 main spans
Daily traffic
150
2020 count
Owner
County
County Highway Agency

About this bridge

FAS 450-CH 20 over Spoon River is a steel continuous stringer/multi-beam or girder carrying FAS 450-CH 20 over Spoon River in Fulton County, Illinois. It was built in 1984, so it is 41 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 150 vehicles a day, roughly 13% of them trucks, projected to reach 152 by 2046. The structure is 401 ft (122.2 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesFAS 450-CH 20
CrossesSpoon River
LocationNE-8-T8NR2E
RouteCounty Highway 0
CountyFulton County
StateIllinois
Coordinates40.69722, -90.29037
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating59.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length401 ft (122.2 m)
Longest span154 ft (46.9 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic152 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 450-CH 20 over Spoon River built?

It was built in 1984, making it 41 years old in 2025.

What condition is FAS 450-CH 20 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 November 2023.

How much traffic does FAS 450-CH 20 over Spoon River carry?

About 150 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is FAS 450-CH 20 over Spoon River?

The structure is 401 ft (122.2 m) long with a longest span of 154 ft (46.9 m) and a deck 31 ft wide.

Who owns FAS 450-CH 20 over Spoon River?

It is owned by the County Highway Agency.