US Bridges

34th Ave NW over I-80 & US-65

Fair

Polk County, Iowa · 0.4 Miles W of JCT US 65 · Structure no. 000000000042011

Built
2013
12 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
309 ft
4 main spans
Daily traffic
5,106
2023 count
Owner
State
State Highway Agency

About this bridge

34th Ave NW over I-80 & US-65 is a prestressed concrete stringer/multi-beam or girder carrying 34th Ave NW over I-80 & US-65 in Polk County, Iowa. It was built in 2013, so it is 12 years old, younger 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 5,106 vehicles a day, roughly 7% of them trucks, projected to reach 5,106 by 2043. The structure is 309 ft (94.2 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries34th Ave NW
CrossesI-80 & US-65
Location0.4 Miles W of JCT US 65
RouteCity Street 0
CountyPolk County
StateIowa
Coordinates41.66173, -93.50309
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length309 ft (94.2 m)
Longest span114 ft (34.6 m)
Deck width58 ft (17.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,106 (2023)
Projected traffic5,106 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 34th Ave NW over I-80 & US-65 built?

It was built in 2013, making it 12 years old in 2025.

What condition is 34th Ave NW over I-80 & US-65 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 December 2023.

How much traffic does 34th Ave NW over I-80 & US-65 carry?

About 5,106 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is 34th Ave NW over I-80 & US-65?

The structure is 309 ft (94.2 m) long with a longest span of 114 ft (34.6 m) and a deck 58 ft wide.

Who owns 34th Ave NW over I-80 & US-65?

It is owned by the State Highway Agency.