US 71 over Stream

Fair

Audubon County, Iowa · 1.7 Mi. N of Jct. I-80 · Structure no. 000000000014070

Built: 1961; 64 years old
Condition: Fair; inspected October 2024
Type: Slab; Concrete Continuous
Length: 84 ft; 3 main spans
Daily traffic: 2,380; 2022 count
Owner: State; State Highway Agency

About this bridge

US 71 over Stream is a concrete continuous slab carrying US 71 over Stream in Audubon County, Iowa. It was built in 1961, so it is 64 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 2,380 vehicles a day, roughly 21% of them trucks, projected to reach 2,380 by 2044. The structure is 84 ft (25.6 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesUS 71

CrossesStream

Location1.7 Mi. N of Jct. I-80

RouteU.S. Route 71

CountyAudubon County

StateIowa

Coordinates41.52256, -94.93739

Functional classRural Principal Arterial - Other

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
Deck	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	7 Good	Some minor problems.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionOctober 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry4: Meets minimum tolerable limits to be left in place as is

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating38.3 US tons

Inventory rating23 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length84 ft (25.6 m)

Longest span31 ft (9.4 m)

Deck width36 ft (11 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,380 (2022)

Projected traffic2,380 by 2044

Trucks21%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed6.8 mi (11 km)

TollOn a free road

National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency

Maintained byState Highway Agency

Historic statusPossibly eligible for the National Register; requires further investigation

Work proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was US 71 over Stream built?

It was built in 1961, making it 64 years old in 2025.

What condition is US 71 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 2024.

How much traffic does US 71 over Stream carry?

About 2,380 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is US 71 over Stream?

The structure is 84 ft (25.6 m) long with a longest span of 31 ft (9.4 m) and a deck 36 ft wide.

Who owns US 71 over Stream?

It is owned by the State Highway Agency.