US Bridges

SE 12th ST over I-235

Good

Polk County, Iowa · 5.2 Mi. E of Jct. Ia 28 · Structure no. 000000000042871

Built
2002
23 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
302 ft
2 main spans
Daily traffic
2,619
2022 count
Owner
State
State Highway Agency

About this bridge

SE 12th ST over I-235 is a steel continuous stringer/multi-beam or girder carrying SE 12th ST over I-235 in Polk County, Iowa. It was built in 2002, so it is 23 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 2,619 vehicles a day, projected to reach 2,619 by 2044. The structure is 302 ft (92.1 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSE 12th ST
CrossesI-235
Location5.2 Mi. E of Jct. Ia 28
RouteCity Street 0
CountyPolk County
StateIowa
Coordinates41.59487, -93.60281
Functional classUrban Local

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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 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 rating57 US tons
Inventory rating34.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length302 ft (92.1 m)
Longest span153 ft (46.6 m)
Deck width50 ft (15.3 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,619 (2022)
Projected traffic2,619 by 2044
Trucks0%
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 SE 12th ST over I-235 built?

It was built in 2002, making it 23 years old in 2025.

What condition is SE 12th 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 September 2024.

How much traffic does SE 12th ST over I-235 carry?

About 2,619 vehicles per day (2022 count).

How long is SE 12th ST over I-235?

The structure is 302 ft (92.1 m) long with a longest span of 153 ft (46.6 m) and a deck 50 ft wide.

Who owns SE 12th ST over I-235?

It is owned by the State Highway Agency.