US Bridges

EB I-235 over 73rd St& Ia Interstate R

Good

Polk County, Iowa · 3.2 MI E of W JCT I 80/35 · Structure no. 000000000042250

Built
1968
57 years old, rebuilt 1986
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
327 ft
4 main spans
Daily traffic
50,400
2022 count
Owner
State
State Highway Agency

About this bridge

EB I-235 over 73rd St& Ia Interstate R is a steel continuous stringer/multi-beam or girder carrying EB I-235 over 73rd St& Ia Interstate R in Polk County, Iowa. It was built in 1968 and reconstructed in 1986, so it is 57 years old, older 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 50,400 vehicles a day, roughly 7% of them trucks, projected to reach 50,400 by 2044. The structure is 327 ft (99.7 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesEB I-235
Crosses73rd St& Ia Interstate R
Location3.2 MI E of W JCT I 80/35
RouteInterstate 235
StateIowa
Coordinates41.59327, -93.71578
Functional classUrban Principal Arterial - Interstate

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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating42.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length327 ft (99.7 m)
Longest span98 ft (29.9 m)
Deck width68 ft (20.6 m)
Roadway width65 ft (19.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,400 (2022)
Projected traffic50,400 by 2044
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 EB I-235 over 73rd St& Ia Interstate R built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1986.

What condition is EB I-235 over 73rd St& Ia Interstate R 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 May 2024.

How much traffic does EB I-235 over 73rd St& Ia Interstate R carry?

About 50,400 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is EB I-235 over 73rd St& Ia Interstate R?

The structure is 327 ft (99.7 m) long with a longest span of 98 ft (29.9 m) and a deck 68 ft wide.

Who owns EB I-235 over 73rd St& Ia Interstate R?

It is owned by the State Highway Agency.