Local over Hardin Creek

Good

Calhoun County, Iowa · 086311101 · Structure no. 000000000090191

Built: 1994; 31 years old
Condition: Good; inspected July 2023
Type: Slab; Concrete Continuous
Length: 78 ft; 3 main spans
Daily traffic: 40; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Hardin Creek is a concrete continuous slab carrying Local over Hardin Creek in Calhoun County, Iowa. It was built in 1994, so it is 31 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 40 vehicles a day, projected to reach 40 by 2043. The structure is 78 ft (23.8 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesLocal

CrossesHardin Creek

Location086311101

RouteCounty Highway 0

CountyCalhoun County

StateIowa

Coordinates42.28153, -94.42627

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.

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 length78 ft (23.8 m)

Longest span29 ft (8.8 m)

Deck width33 ft (10.1 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)

Projected traffic40 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 statusNot eligible for the National Register of Historic Places

Work proposedOther structural work, including hydraulic replacements

Estimated improvement cost$30,000 (2023 estimate)

NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Hardin Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Local 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 Local over Hardin Creek carry?

About 40 vehicles per day (2022 count).

How long is Local over Hardin Creek?

The structure is 78 ft (23.8 m) long with a longest span of 29 ft (8.8 m) and a deck 33 ft wide.

Who owns Local over Hardin Creek?

It is owned by the County Highway Agency.