360th ST over Skunk River

Good

Hamilton County, Iowa · 086241405 · Structure no. 000000000170851

Built: 2013; 12 years old
Condition: Good; inspected September 2021
Type: Slab; Concrete Continuous
Length: 121 ft; 3 main spans
Daily traffic: 80; 2022 count
Owner: County; County Highway Agency

About this bridge

360th ST over Skunk River is a concrete continuous slab carrying 360th ST over Skunk River in Hamilton County, Iowa. It was built in 2013, so it is 12 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 80 vehicles a day, projected to reach 80 by 2043. The structure is 121 ft (36.9 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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Carries360th ST

CrossesSkunk River

Location086241405

RouteCounty Highway 0

CountyHamilton County

StateIowa

Coordinates42.26729, -93.6038

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	8 Very Good	No problems noted.
Superstructure	8 Very Good	No problems noted.
Substructure	8 Very Good	No problems noted.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionSeptember 2021

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation8: Equal to present desirable criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating57.1 US tons

Inventory rating44 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHL 93

Structure length121 ft (36.9 m)

Longest span47 ft (14.3 m)

Deck width33 ft (10.1 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)

Projected traffic80 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed6.2 mi (10 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 360th ST over Skunk River built?

It was built in 2013, making it 12 years old in 2025.

What condition is 360th ST over Skunk River 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 September 2021.

How much traffic does 360th ST over Skunk River carry?

About 80 vehicles per day (2022 count).

How long is 360th ST over Skunk River?

The structure is 121 ft (36.9 m) long with a longest span of 47 ft (14.3 m) and a deck 33 ft wide.

Who owns 360th ST over Skunk River?

It is owned by the County Highway Agency.