US Bridges

Ill 92 S.B. over 31st St-Rock Island

Fair

Rock Island County, Illinois · Centennial Frwy R.I. · Structure no. 081017200000000

Built
2008
17 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
128 ft
3 main spans
Daily traffic
13,100
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 92 S.B. over 31st St-Rock Island is a steel continuous stringer/multi-beam or girder carrying Ill 92 S.B. over 31st St-Rock Island in Rock Island County, Illinois. It was built in 2008, so it is 17 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 13,100 vehicles a day, roughly 13% of them trucks, projected to reach 5,404 by 2046. The structure is 128 ft (38.9 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIll 92 S.B.
Crosses31st St-Rock Island
LocationCentennial Frwy R.I.
RouteState Highway 92
CountyRock Island County
StateIllinois
Coordinates41.48343, -90.60205
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length128 ft (38.9 m)
Longest span64 ft (19.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,100 (2023)
Projected traffic5,404 by 2046
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Ill 92 S.B. over 31st St-Rock Island built?

It was built in 2008, making it 17 years old in 2025.

What condition is Ill 92 S.B. over 31st St-Rock Island 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 January 2025.

How much traffic does Ill 92 S.B. over 31st St-Rock Island carry?

About 13,100 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Ill 92 S.B. over 31st St-Rock Island?

The structure is 128 ft (38.9 m) long with a longest span of 64 ft (19.4 m) and a deck 43 ft wide.

Who owns Ill 92 S.B. over 31st St-Rock Island?

It is owned by the State Highway Agency.