I-80 over Stream

Fair

Adair County, Iowa · 0.8 Mi. W of Jct. SR G-30 · Structure no. 000000000013080

Built: 1958; 67 years old
Condition: Fair; inspected October 2023
Type: Culvert; Concrete Continuous
Length: 28 ft; 2 main spans
Daily traffic: 23,300; 2022 count
Owner: State; State Highway Agency

About this bridge

I-80 over Stream is a concrete continuous culvert carrying I-80 over Stream in Adair County, Iowa. It was built in 1958, so it is 67 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 23,300 vehicles a day, roughly 41% of them trucks, projected to reach 23,300 by 2042. The structure is 28 ft (8.5 m) long.

Location

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CarriesI-80

CrossesStream

Location0.8 Mi. W of Jct. SR G-30

RouteInterstate 80

CountyAdair County

StateIowa

Coordinates41.49364, -94.6781

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.

Component	Rating	Meaning
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.
Culvert	5 Fair	All 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 alignment7: Better than present minimum criteria

Operating rating48 US tons

Inventory rating36 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans2

Design loadHS 20

Structure length28 ft (8.5 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 traffic23,300 (2022)

Projected traffic23,300 by 2042

Trucks41%

Lanes on structure4

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed—

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 1958, making it 67 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 23,300 vehicles per day (2022 count), of which roughly 41% are trucks.

How long is I-80 over Stream?

The structure is 28 ft (8.5 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.