US Bridges

12th Ave over 15th Street

Fair

Rock Island County, Illinois · In Moline · Structure no. 081605300000000

Built
1991
34 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
290 ft
3 main spans
Daily traffic
4,350
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

12th Ave over 15th Street is a steel continuous stringer/multi-beam or girder carrying 12th Ave over 15th Street in Rock Island County, Illinois. It was built in 1991, so it is 34 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 4,350 vehicles a day, roughly 3% of them trucks, projected to reach 4,394 by 2046. The structure is 290 ft (88.4 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries12th Ave
Crosses15th Street
LocationIn Moline
Coordinates41.50044, -90.51558
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length290 ft (88.4 m)
Longest span116 ft (35.4 m)
Deck width52 ft (15.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,350 (2022)
Projected traffic4,394 by 2046
Trucks3%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 12th Ave over 15th Street built?

It was built in 1991, making it 34 years old in 2025.

What condition is 12th Ave over 15th Street 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 2024.

How much traffic does 12th Ave over 15th Street carry?

About 4,350 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 12th Ave over 15th Street?

The structure is 290 ft (88.4 m) long with a longest span of 116 ft (35.4 m) and a deck 52 ft wide.

Who owns 12th Ave over 15th Street?

It is owned by the City or Municipal Highway Agency.