US Bridges

EB I-235 over 17th ST

Fair

Polk County, Iowa · 1.3 Mi. W of Jct. Ia 28 · Structure no. 000000000042220

Built
1967
58 years old, rebuilt 2004
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
145 ft
3 main spans
Daily traffic
56,600
2022 count
Owner
State
State Highway Agency

About this bridge

EB I-235 over 17th ST is a prestressed concrete stringer/multi-beam or girder carrying EB I-235 over 17th ST in Polk County, Iowa. It was built in 1967 and reconstructed in 2004, so it is 58 years old, older 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 56,600 vehicles a day, roughly 6% of them trucks, projected to reach 56,600 by 2044. The structure is 145 ft (44.2 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEB I-235
Crosses17th ST
Location1.3 Mi. W of Jct. Ia 28
RouteInterstate 235
CountyPolk County
StateIowa
Coordinates41.59329, -93.7276
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 rating77.8 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span57 ft (17.4 m)
Deck width67 ft (20.4 m)
Roadway width64 ft (19.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,600 (2022)
Projected traffic56,600 by 2044
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 17th ST built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2004.

What condition is EB I-235 over 17th ST 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 October 2024.

How much traffic does EB I-235 over 17th ST carry?

About 56,600 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is EB I-235 over 17th ST?

The structure is 145 ft (44.2 m) long with a longest span of 57 ft (17.4 m) and a deck 67 ft wide.

Who owns EB I-235 over 17th ST?

It is owned by the State Highway Agency.