A 46 over Turkey River

Good

Winneshiek County, Iowa · 0.4 MI from 345th Ave · Structure no. 000000000348121

Built: 2018; 7 years old
Condition: Good; inspected March 2023
Type: Slab; Concrete Continuous
Length: 80 ft; 3 main spans
Daily traffic: 766; 2022 count
Owner: County; County Highway Agency

About this bridge

A 46 over Turkey River is a concrete continuous slab carrying A 46 over Turkey River in Winneshiek County, Iowa. It was built in 2018, so it is 7 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 766 vehicles a day, roughly 23% of them trucks, projected to reach 766 by 2043. The structure is 80 ft (24.4 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesA 46

CrossesTurkey River

Location0.4 MI from 345th Ave

RouteCounty Highway 0

CountyWinneshiek County

StateIowa

Coordinates43.29919, -92.07277

Functional classRural Minor Collector

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 inspectionMarch 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 rating57.5 US tons

Inventory rating44.3 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHL 93

Structure length80 ft (24.4 m)

Longest span31 ft (9.4 m)

Deck width32 ft (9.8 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic766 (2022)

Projected traffic766 by 2043

Trucks23%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.9 mi (3 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 A 46 over Turkey River built?

It was built in 2018, making it 7 years old in 2025.

What condition is A 46 over Turkey 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 March 2023.

How much traffic does A 46 over Turkey River carry?

About 766 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is A 46 over Turkey River?

The structure is 80 ft (24.4 m) long with a longest span of 31 ft (9.4 m) and a deck 32 ft wide.

Who owns A 46 over Turkey River?

It is owned by the County Highway Agency.