Local over Middle River

Good

Adair County, Iowa · 000000000 · Structure no. 000000000058071

Built: 2009; 16 years old
Condition: Good; inspected May 2023
Type: Slab; Concrete Continuous
Length: 130 ft; 3 main spans
Daily traffic: 41; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Middle River is a concrete continuous slab carrying Local over Middle River in Adair County, Iowa. It was built in 2009, so it is 16 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 41 vehicles a day, projected to reach 41 by 2043. The structure is 130 ft (39.6 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesLocal

CrossesMiddle River

Location000000000

RouteCounty Highway 0

CountyAdair County

StateIowa

Coordinates41.48926, -94.47299

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

Last inspectionMay 2023

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation8: Equal to present desirable criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating79.7 US tons

Inventory rating47.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length130 ft (39.6 m)

Longest span51 ft (15.5 m)

Deck width27 ft (8.1 m)

Roadway width25 ft (7.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)

Projected traffic41 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 proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Middle River built?

It was built in 2009, making it 16 years old in 2025.

What condition is Local over Middle 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 May 2023.

How much traffic does Local over Middle River carry?

About 41 vehicles per day (2022 count).

How long is Local over Middle River?

The structure is 130 ft (39.6 m) long with a longest span of 51 ft (15.5 m) and a deck 27 ft wide.

Who owns Local over Middle River?

It is owned by the County Highway Agency.