US Bridges

3rd ST over I-235

Good

Polk County, Iowa · 4.3 Mi. E of Jct. Ia #28 · Structure no. 000000000042711

Built
2003
22 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
313 ft
3 main spans
Daily traffic
8,006
2022 count
Owner
State
State Highway Agency

About this bridge

3rd ST over I-235 is a steel continuous stringer/multi-beam or girder carrying 3rd ST over I-235 in Polk County, Iowa. It was built in 2003, so it is 22 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 8,006 vehicles a day, roughly 2% of them trucks, projected to reach 8,006 by 2044. The structure is 313 ft (95.4 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries3rd ST
CrossesI-235
Location4.3 Mi. E of Jct. Ia #28
RouteCity Street 0
CountyPolk County
StateIowa
Coordinates41.59624, -93.62152
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.2 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length313 ft (95.4 m)
Longest span115 ft (35.1 m)
Deck width65 ft (19.8 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,006 (2022)
Projected traffic8,006 by 2044
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 3rd ST over I-235 built?

It was built in 2003, making it 22 years old in 2025.

What condition is 3rd ST 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 July 2024.

How much traffic does 3rd ST over I-235 carry?

About 8,006 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 3rd ST over I-235?

The structure is 313 ft (95.4 m) long with a longest span of 115 ft (35.1 m) and a deck 65 ft wide.

Who owns 3rd ST over I-235?

It is owned by the State Highway Agency.