US Bridges

Ill 92 over 18th Ave-Rock Island

Fair

Rock Island County, Illinois · Centennial Frwy R.I. · Structure no. 081017100000000

Built
2009
16 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
117 ft
3 main spans
Daily traffic
10,200
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 92 over 18th Ave-Rock Island is a steel continuous stringer/multi-beam or girder carrying Ill 92 over 18th Ave-Rock Island in Rock Island County, Illinois. It was built in 2009, so it is 16 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 10,200 vehicles a day, roughly 10% of them trucks, projected to reach 9,090 by 2046. The structure is 117 ft (35.8 m) long and 77 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIll 92
Crosses18th Ave-Rock Island
LocationCentennial Frwy R.I.
RouteState Highway 92
CountyRock Island County
StateIllinois
Coordinates41.49433, -90.59324
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 rating98.2 US tons
Inventory rating70.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length117 ft (35.8 m)
Longest span60 ft (18.3 m)
Deck width77 ft (23.5 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,200 (2023)
Projected traffic9,090 by 2046
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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 over 18th Ave-Rock Island built?

It was built in 2009, making it 16 years old in 2025.

What condition is Ill 92 over 18th Ave-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 over 18th Ave-Rock Island carry?

About 10,200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ill 92 over 18th Ave-Rock Island?

The structure is 117 ft (35.8 m) long with a longest span of 60 ft (18.3 m) and a deck 77 ft wide.

Who owns Ill 92 over 18th Ave-Rock Island?

It is owned by the State Highway Agency.