US Bridges

US 71 over Stream

Good

Audubon County, Iowa · 0.1 Mi. N of Jct. Ia 44 · Structure no. 000000000014131

Built
1983
42 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
113 ft
3 main spans
Daily traffic
3,700
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 1983, so it is 42 years old, younger 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 3,700 vehicles a day, roughly 11% of them trucks, projected to reach 3,700 by 2044. The structure is 113 ft (34.4 m) long and 43 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesUS 71
CrossesStream
Location0.1 Mi. N of Jct. Ia 44
RouteU.S. Route 71
StateIowa
Coordinates41.66809, -94.90587
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.5 US tons
Inventory rating39.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span43 ft (13.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,700 (2022)
Projected traffic3,700 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes

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 US 71 over Stream built?

It was built in 1983, making it 42 years old in 2025.

What condition is US 71 over Stream 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 September 2024.

How much traffic does US 71 over Stream carry?

About 3,700 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is US 71 over Stream?

The structure is 113 ft (34.4 m) long with a longest span of 43 ft (13.1 m) and a deck 43 ft wide.

Who owns US 71 over Stream?

It is owned by the State Highway Agency.