Local over Marvel Creek

Good

Adair County, Iowa · 075300702 · Structure no. 000000000055591

Built: 1997; 28 years old
Condition: Good; inspected April 2024
Type: Slab; Concrete Continuous
Length: 76 ft; 3 main spans
Daily traffic: 82; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Marvel Creek is a concrete continuous slab carrying Local over Marvel Creek in Adair County, Iowa. It was built in 1997, so it is 28 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 82 vehicles a day, projected to reach 82 by 2043. The structure is 76 ft (23.2 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesLocal

CrossesMarvel Creek

Location075300702

RouteCounty Highway 0

CountyAdair County

StateIowa

Coordinates41.30814, -94.35686

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 inspectionApril 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation7: Better than present minimum criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating83.8 US tons

Inventory rating50.2 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length76 ft (23.2 m)

Longest span30 ft (9.1 m)

Deck width27 ft (8.3 m)

Roadway width25 ft (7.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic82 (2022)

Projected traffic82 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—

NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Marvel Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is Local over Marvel 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 April 2024.

How much traffic does Local over Marvel Creek carry?

About 82 vehicles per day (2022 count).

How long is Local over Marvel Creek?

The structure is 76 ft (23.2 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns Local over Marvel Creek?

It is owned by the County Highway Agency.