US Bridges

Wb/Nb Ia 141 over Little Beaver Creek

Fair

Polk County, Iowa · 1.3 Miles W of JCT Ia 44 · Structure no. 000000000040852

Built
1974
51 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
369 ft
4 main spans
Daily traffic
9,800
2022 count
Owner
State
State Highway Agency

About this bridge

Wb/Nb Ia 141 over Little Beaver Creek is a prestressed concrete stringer/multi-beam or girder carrying Wb/Nb Ia 141 over Little Beaver Creek 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 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 9,800 vehicles a day, roughly 6% of them trucks, projected to reach 9,800 by 2044. The structure is 369 ft (112.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWb/Nb Ia 141
CrossesLittle Beaver Creek
Location1.3 Miles W of JCT Ia 44
RouteState Highway 141
StateIowa
Coordinates41.70716, -93.77442
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating29.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length369 ft (112.5 m)
Longest span91 ft (27.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,800 (2022)
Projected traffic9,800 by 2044
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wb/Nb Ia 141 over Little Beaver Creek built?

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

What condition is Wb/Nb Ia 141 over Little Beaver Creek 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 June 2024.

How much traffic does Wb/Nb Ia 141 over Little Beaver Creek carry?

About 9,800 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Wb/Nb Ia 141 over Little Beaver Creek?

The structure is 369 ft (112.5 m) long with a longest span of 91 ft (27.7 m) and a deck 43 ft wide.

Who owns Wb/Nb Ia 141 over Little Beaver Creek?

It is owned by the State Highway Agency.