FM F-58 over Creek

Good

Audubon County, Iowa · 078343404 · Structure no. 000000000066581

Built: 2007; 18 years old
Condition: Good; inspected March 2024
Type: Culvert; Concrete Continuous
Length: 23 ft; 2 main spans
Daily traffic: 278; 2022 count
Owner: County; County Highway Agency

About this bridge

FM F-58 over Creek is a concrete continuous culvert carrying FM F-58 over Creek in Audubon County, Iowa. It was built in 2007, so it is 18 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 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 278 vehicles a day, roughly 15% of them trucks, projected to reach 278 by 2044. The structure is 23 ft (7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesFM F-58

CrossesCreek

Location078343404

RouteCounty Highway 0

CountyAudubon County

StateIowa

Coordinates41.50483, -94.75807

Functional classRural Major Collector

Condition and inspection

Good

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

Component	Rating	Meaning
Channel and channel protection	7 Good	Some minor problems.
Culvert	7 Good	Some minor problems.

Last inspectionMarch 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation7: Better than present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating53.2 US tons

Inventory rating31.7 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans2

Design loadHS 20

Structure length23 ft (7 m)

Longest span21 ft (6.4 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic278 (2022)

Projected traffic278 by 2044

Trucks15%

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—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM F-58 over Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is FM F-58 over 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 March 2024.

How much traffic does FM F-58 over Creek carry?

About 278 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is FM F-58 over Creek?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m).

Who owns FM F-58 over Creek?

It is owned by the County Highway Agency.