FM over Hardin Creek

Good

Calhoun County, Iowa · 087313501 · Structure no. 000000000091151

Built: 2003; 22 years old
Condition: Good; inspected July 2023
Type: Slab; Concrete Continuous
Length: 79 ft; 3 main spans
Daily traffic: 26; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Hardin Creek is a concrete continuous slab carrying FM over Hardin Creek in Calhoun County, Iowa. It was built in 2003, so it is 22 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 26 vehicles a day, projected to reach 26 by 2043. The structure is 79 ft (24.1 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesFM

CrossesHardin Creek

Location087313501

RouteCounty Highway 0

CountyCalhoun County

StateIowa

Coordinates42.31069, -94.42557

Functional classRural Minor 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
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionJuly 2023

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation7: Better than present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating84.1 US tons

Inventory rating50.4 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length79 ft (24.1 m)

Longest span29 ft (8.8 m)

Deck width32 ft (9.9 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)

Projected traffic26 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.7 mi (6 km)

TollOn a free road

National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency

Maintained byCounty Highway Agency

Historic statusPossibly eligible for the National Register; requires further investigation

Work proposedOther structural work, including hydraulic replacements

Estimated improvement cost$30,000 (2023 estimate)

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Hardin Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is FM over Hardin 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 July 2023.

How much traffic does FM over Hardin Creek carry?

About 26 vehicles per day (2022 count).

How long is FM over Hardin Creek?

The structure is 79 ft (24.1 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns FM over Hardin Creek?

It is owned by the County Highway Agency.