US Bridges

I 80 EB over Iowa River

Good

Johnson County, Iowa · 3.0 Mi. W of Jct. Ia 1 · Structure no. 000000000032091

Built
1960
65 years old, rebuilt 1999
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
432 ft
5 main spans
Daily traffic
32,900
2023 count
Owner
State
State Highway Agency

About this bridge

I 80 EB over Iowa River is a steel continuous stringer/multi-beam or girder carrying I 80 EB over Iowa River in Johnson County, Iowa. It was built in 1960 and reconstructed in 1999, so it is 65 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 32,900 vehicles a day, roughly 23% of them trucks, projected to reach 32,900 by 2043. The structure is 432 ft (131.7 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 80 EB
CrossesIowa River
Location3.0 Mi. W of Jct. Ia 1
RouteInterstate 80
StateIowa
Coordinates41.68545, -91.5581
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length432 ft (131.7 m)
Longest span94 ft (28.7 m)
Deck width69 ft (20.9 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,900 (2023)
Projected traffic32,900 by 2043
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 80 EB over Iowa River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1999.

What condition is I 80 EB over Iowa River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does I 80 EB over Iowa River carry?

About 32,900 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I 80 EB over Iowa River?

The structure is 432 ft (131.7 m) long with a longest span of 94 ft (28.7 m) and a deck 69 ft wide.

Who owns I 80 EB over Iowa River?

It is owned by the State Highway Agency.