US Bridges

430th ST over Willow Creek

Good

Clay County, Iowa · 095382601 · Structure no. 000000000116461

Built
2020
5 years old
Condition
Good
inspected February 2023
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

430th ST over Willow Creek is a concrete continuous slab carrying 430th ST over Willow Creek in Clay County, Iowa. It was built in 2020, so it is 5 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 15 vehicles a day, projected to reach 15 by 2043. The structure is 73 ft (22.3 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries430th ST
CrossesWillow Creek
Location095382601
RouteCounty Highway 0
CountyClay County
StateIowa
Coordinates43.02481, -95.3018
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 inspectionFebruary 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 rating59 US tons
Inventory rating45.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span28 ft (8.5 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 by 2043
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 430th ST over Willow Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is 430th 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 February 2023.

How much traffic does 430th ST over Willow Creek carry?

About 15 vehicles per day (2022 count).

How long is 430th ST over Willow Creek?

The structure is 73 ft (22.3 m) long with a longest span of 28 ft (8.5 m) and a deck 33 ft wide.

Who owns 430th ST over Willow Creek?

It is owned by the County Highway Agency.