US Bridges

I-80 over Stream

Fair

Cedar County, Iowa · 0.7 Mi. E of Jct. SR X30 · Structure no. 000000000018530

Built
1960
65 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
39,700
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 Cedar County, Iowa. It was built in 1960, 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 fair condition with a lowest component rating of 5 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 39,700 vehicles a day, roughly 37% of them trucks, projected to reach 39,700 by 2043. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-80
CrossesStream
Location0.7 Mi. E of Jct. SR X30
RouteInterstate 80
CountyCedar County
StateIowa
Coordinates41.66405, -91.33386
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating75.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,700 (2023)
Projected traffic39,700 by 2043
Trucks37%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-80 over Stream built?

It was built in 1960, making it 65 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 October 2023.

How much traffic does I-80 over Stream carry?

About 39,700 vehicles per day (2023 count), of which roughly 37% are trucks.

How long is I-80 over Stream?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m).

Who owns I-80 over Stream?

It is owned by the State Highway Agency.