Ia 346 over Two Mile Creek

Good

Chickasaw County, Iowa · 4.8 Mi. E of Jct. US 218 · Structure no. 000000000019921

Built: 1984; 41 years old
Condition: Good; inspected April 2024
Type: Slab; Concrete Continuous
Length: 113 ft; 3 main spans
Daily traffic: 2,150; 2022 count
Owner: State; State Highway Agency

About this bridge

Ia 346 over Two Mile Creek is a concrete continuous slab carrying Ia 346 over Two Mile Creek in Chickasaw County, Iowa. It was built in 1984, so it is 41 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 2,150 vehicles a day, roughly 15% of them trucks, projected to reach 2,150 by 2044. The structure is 113 ft (34.4 m) long and 39 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesIa 346

CrossesTwo Mile Creek

Location4.8 Mi. E of Jct. US 218

RouteState Highway 346

CountyChickasaw County

StateIowa

Coordinates42.96535, -92.46266

Functional classRural Minor Arterial

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 within limits of footing or piles

Structural evaluation7: Better than present minimum criteria

Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating88 US tons

Inventory rating53 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length113 ft (34.4 m)

Longest span43 ft (13.1 m)

Deck width39 ft (11.9 m)

Roadway width36 ft (11 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,150 (2022)

Projected traffic2,150 by 2044

Trucks15%

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

OwnerState Highway Agency

Maintained byState 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 Ia 346 over Two Mile Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Ia 346 over Two Mile 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 Ia 346 over Two Mile Creek carry?

About 2,150 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Ia 346 over Two Mile Creek?

The structure is 113 ft (34.4 m) long with a longest span of 43 ft (13.1 m) and a deck 39 ft wide.

Who owns Ia 346 over Two Mile Creek?

It is owned by the State Highway Agency.