US Bridges

WB Ia 141 over Ia 17

Good

Polk County, Iowa · At Junction Iowa 17 · Structure no. 000000000602932

Built
1974
51 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
257 ft
4 main spans
Daily traffic
5,600
2022 count
Owner
State
State Highway Agency

About this bridge

WB Ia 141 over Ia 17 is a prestressed concrete stringer/multi-beam or girder carrying WB Ia 141 over Ia 17 in Polk County, Iowa. It was built in 1974, so it is 51 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 5,600 vehicles a day, roughly 7% of them trucks, projected to reach 5,600 by 2044. The structure is 257 ft (78.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWB Ia 141
CrossesIa 17
LocationAt Junction Iowa 17
RouteState Highway 141
StateIowa
Coordinates41.75063, -93.81418
Functional classRural Principal Arterial - Other

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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating78.5 US tons
Inventory rating36.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length257 ft (78.3 m)
Longest span69 ft (21 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,600 (2022)
Projected traffic5,600 by 2044
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 WB Ia 141 over Ia 17 built?

It was built in 1974, making it 51 years old in 2025.

What condition is WB Ia 141 over Ia 17 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 March 2024.

How much traffic does WB Ia 141 over Ia 17 carry?

About 5,600 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is WB Ia 141 over Ia 17?

The structure is 257 ft (78.3 m) long with a longest span of 69 ft (21 m) and a deck 43 ft wide.

Who owns WB Ia 141 over Ia 17?

It is owned by the State Highway Agency.