US Bridges

150th ST over Willow Creek

Good

Plymouth County, Iowa · 093443101 · Structure no. 000000000276481

Built
1992
33 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
71
2021 count
Owner
County
County Highway Agency

About this bridge

150th ST over Willow Creek is a concrete continuous slab carrying 150th ST over Willow Creek in Plymouth County, Iowa. It was built in 1992, so it is 33 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 71 vehicles a day, projected to reach 71 by 2044. The structure is 128 ft (39 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries150th ST
CrossesWillow Creek
Location093443101
RouteCounty Highway 0
StateIowa
Coordinates42.83685, -96.09191
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.6 US tons
Inventory rating58.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span46 ft (14 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2021)
Projected traffic71 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 150th ST over Willow Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is 150th ST over Willow Creek 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 2023.

How much traffic does 150th ST over Willow Creek carry?

About 71 vehicles per day (2021 count).

How long is 150th ST over Willow Creek?

The structure is 128 ft (39 m) long with a longest span of 46 ft (14 m) and a deck 32 ft wide.

Who owns 150th ST over Willow Creek?

It is owned by the County Highway Agency.