US Bridges

I-80 over Stream

Fair

Iowa County, Iowa · 0.4 Miles W of JCT Ia 149 · Structure no. 000000000029840

Built
1962
63 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
30,300
2023 count
Owner
State
State Highway Agency

About this bridge

I-80 over Stream is a concrete continuous culvert carrying I-80 over Stream in Iowa County, Iowa. It was built in 1962, so it is 63 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 30,300 vehicles a day, roughly 37% of them trucks, projected to reach 30,300 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesI-80
CrossesStream
Location0.4 Miles W of JCT Ia 149
RouteInterstate 80
CountyIowa County
StateIowa
Coordinates41.68703, -92.01572
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating60.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,300 (2023)
Projected traffic30,300 by 2043
Trucks37%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 I-80 over Stream built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-80 over Stream 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 June 2024.

How much traffic does I-80 over Stream carry?

About 30,300 vehicles per day (2023 count), of which roughly 37% are trucks.

How long is I-80 over Stream?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).

Who owns I-80 over Stream?

It is owned by the State Highway Agency.