US Bridges

1st Ave over I-80

Fair

Scott County, Iowa · 2.0 Mi. W of SR Y30 · Structure no. 000000000047410

Built
1959
66 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
211 ft
4 main spans
Daily traffic
80
2022 count
Owner
State
State Highway Agency

About this bridge

1st Ave over I-80 is a prestressed concrete stringer/multi-beam or girder carrying 1st Ave over I-80 in Scott County, Iowa. It was built in 1959, so it is 66 years old, older than the Iowa average of 45.5 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 80 vehicles a day, roughly 21% of them trucks, projected to reach 80 by 2044. The structure is 211 ft (64.3 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries1st Ave
CrossesI-80
Location2.0 Mi. W of SR Y30
RouteCounty Highway 0
CountyScott County
StateIowa
Coordinates41.63267, -90.89954
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.2 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length211 ft (64.3 m)
Longest span67 ft (20.4 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic80 by 2044
Trucks21%
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 1st Ave over I-80 built?

It was built in 1959, making it 66 years old in 2025.

What condition is 1st Ave over I-80 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 March 2024.

How much traffic does 1st Ave over I-80 carry?

About 80 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is 1st Ave over I-80?

The structure is 211 ft (64.3 m) long with a longest span of 67 ft (20.4 m) and a deck 28 ft wide.

Who owns 1st Ave over I-80?

It is owned by the State Highway Agency.