Local over Unamed Creek

Good

Ida County, Iowa · 087402901 · Structure no. 000000000186311

Built: 1990; 35 years old
Condition: Good; inspected March 2021
Type: Culvert; Concrete Continuous
Length: 23 ft; 2 main spans
Daily traffic: 35; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Unamed Creek is a concrete continuous culvert carrying Local over Unamed Creek in Ida County, Iowa. It was built in 1990, so it is 35 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 35 vehicles a day, projected to reach 35 by 2043. The structure is 23 ft (7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLocal

CrossesUnamed Creek

Location087402901

RouteCounty Highway 0

CountyIda County

StateIowa

Coordinates42.32704, -95.52551

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
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.
Culvert	7 Good	Some minor problems.

Last inspectionMarch 2021

Inspection intervalevery 48 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 rating48.6 US tons

Inventory rating36 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans2

Design loadHS 20

Structure length23 ft (7 m)

Longest span10 ft (3 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)

Projected traffic35 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.2 mi (2 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—

NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Unamed Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Local over Unamed 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 2021.

How much traffic does Local over Unamed Creek carry?

About 35 vehicles per day (2022 count).

How long is Local over Unamed Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns Local over Unamed Creek?

It is owned by the County Highway Agency.