US Bridges

Westown Parkway over I-80/I-35

Good

Polk County, Iowa · 0.2 Mi. E of I-235 · Structure no. 000000000504480

Built
1997
28 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,196 ft
10 main spans
Daily traffic
12,526
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Westown Parkway over I-80/I-35 is a prestressed concrete stringer/multi-beam or girder carrying Westown Parkway over I-80/I-35 in Polk County, Iowa. It was built in 1997, so it is 28 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 12,526 vehicles a day, projected to reach 12,526 by 2043. The structure is 1,196 ft (364.5 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesWestown Parkway
CrossesI-80/I-35
Location0.2 Mi. E of I-235
RouteCity Street 0
CountyPolk County
StateIowa
Coordinates41.59538, -93.77842
Functional classUrban Collector

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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating87.4 US tons
Inventory rating41.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length1,196 ft (364.5 m)
Longest span145 ft (44.2 m)
Deck width70 ft (21.3 m)
Roadway width56 ft (17.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,526 (2022)
Projected traffic12,526 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Westown Parkway over I-80/I-35 built?

It was built in 1997, making it 28 years old in 2025.

What condition is Westown Parkway over I-80/I-35 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 December 2023.

How much traffic does Westown Parkway over I-80/I-35 carry?

About 12,526 vehicles per day (2022 count).

How long is Westown Parkway over I-80/I-35?

The structure is 1,196 ft (364.5 m) long with a longest span of 145 ft (44.2 m) and a deck 70 ft wide.

Who owns Westown Parkway over I-80/I-35?

It is owned by the City or Municipal Highway Agency.