US Bridges

Duquoin ST - Bento over Interstate 57

Fair

Franklin County, Illinois · Near Ncl Benton · Structure no. 028006400000000

Built
1963
62 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
295 ft
4 main spans
Daily traffic
1,050
2024 count
Owner
State
State Highway Agency

About this bridge

Duquoin ST - Bento over Interstate 57 is a steel continuous stringer/multi-beam or girder carrying Duquoin ST - Bento over Interstate 57 in Franklin County, Illinois. It was built in 1963, so it is 62 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 5 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 1,050 vehicles a day, roughly 10% of them trucks, projected to reach 1,061 by 2046. The structure is 295 ft (90 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesDuquoin ST - Bento
CrossesInterstate 57
LocationNear Ncl Benton
CountyFranklin County
StateIllinois
Coordinates38.00899, -88.92873
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length295 ft (90 m)
Longest span85 ft (26 m)
Deck width32 ft (9.7 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2024)
Projected traffic1,061 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Duquoin ST - Bento over Interstate 57 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Duquoin ST - Bento over Interstate 57 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 June 2024.

How much traffic does Duquoin ST - Bento over Interstate 57 carry?

About 1,050 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Duquoin ST - Bento over Interstate 57?

The structure is 295 ft (90 m) long with a longest span of 85 ft (26 m) and a deck 32 ft wide.

Who owns Duquoin ST - Bento over Interstate 57?

It is owned by the State Highway Agency.