US Bridges

6th Ave over I-235

Good

Polk County, Iowa · 1.4 Miles West of US 69 · Structure no. 000000000042621

Built
2004
21 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
247 ft
2 main spans
Daily traffic
9,700
2022 count
Owner
State
State Highway Agency

About this bridge

6th Ave over I-235 is a steel continuous stringer/multi-beam or girder carrying 6th Ave over I-235 in Polk County, Iowa. It was built in 2004, so it is 21 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 9,700 vehicles a day, roughly 2% of them trucks, projected to reach 9,700 by 2042. The structure is 247 ft (75.3 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries6th Ave
CrossesI-235
Location1.4 Miles West of US 69
RouteCity Street 0
CountyPolk County
StateIowa
Coordinates41.59535, -93.62567
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length247 ft (75.3 m)
Longest span145 ft (44.2 m)
Deck width70 ft (21.3 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,700 (2022)
Projected traffic9,700 by 2042
Trucks2%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
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 6th Ave over I-235 built?

It was built in 2004, making it 21 years old in 2025.

What condition is 6th Ave over I-235 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 March 2023.

How much traffic does 6th Ave over I-235 carry?

About 9,700 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 6th Ave over I-235?

The structure is 247 ft (75.3 m) long with a longest span of 145 ft (44.2 m) and a deck 70 ft wide.

Who owns 6th Ave over I-235?

It is owned by the State Highway Agency.