A Ave / N58 over Willow Creek

Fair

Greene County, Iowa · 083323002 · Structure no. 000000000162300

Built: 1964; 61 years old
Condition: Fair; inspected July 2024
Type: Slab; Concrete Continuous
Length: 77 ft; 3 main spans
Daily traffic: 358; 2022 count
Owner: County; County Highway Agency

About this bridge

A Ave / N58 over Willow Creek is a concrete continuous slab carrying A Ave / N58 over Willow Creek in Greene County, Iowa. It was built in 1964, so it is 61 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 5 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 358 vehicles a day, roughly 22% of them trucks, projected to reach 358 by 2044. The structure is 77 ft (23.5 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesA Ave / N58

CrossesWillow Creek

Location083323002

RouteCounty Highway 0

CountyGreene County

StateIowa

Coordinates41.96836, -94.62924

Functional classRural Major Collector

Condition and inspection

Fair

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

Component	Rating	Meaning
Deck	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionJuly 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating49.3 US tons

Inventory rating29.5 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length77 ft (23.5 m)

Longest span29 ft (8.8 m)

Deck width30 ft (9.1 m)

Roadway width28 ft (8.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic358 (2022)

Projected traffic358 by 2044

Trucks22%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed8.1 mi (13 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—

NavigationNo navigation control on waterway

Frequently asked questions

When was A Ave / N58 over Willow Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is A Ave / N58 over Willow 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 July 2024.

How much traffic does A Ave / N58 over Willow Creek carry?

About 358 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is A Ave / N58 over Willow Creek?

The structure is 77 ft (23.5 m) long with a longest span of 29 ft (8.8 m) and a deck 30 ft wide.

Who owns A Ave / N58 over Willow Creek?

It is owned by the County Highway Agency.