US Bridges

Ia 346 over Etter Creek

Good

Chickasaw County, Iowa · 3.6 Mi. W. of U.S. 63 · Structure no. 000000000019931

Built
2017
8 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
1,470
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 346 over Etter Creek is a concrete culvert carrying Ia 346 over Etter Creek in Chickasaw County, Iowa. It was built in 2017, so it is 8 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 1,470 vehicles a day, roughly 17% of them trucks, projected to reach 1,470 by 2043. The structure is 31 ft (9.3 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesIa 346
CrossesEtter Creek
Location3.6 Mi. W. of U.S. 63
RouteState Highway 346
CountyChickasaw County
StateIowa
Coordinates42.96573, -92.3894
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.

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length31 ft (9.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,470 (2022)
Projected traffic1,470 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Etter Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is Ia 346 over Etter 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 October 2023.

How much traffic does Ia 346 over Etter Creek carry?

About 1,470 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is Ia 346 over Etter Creek?

The structure is 31 ft (9.3 m) long with a longest span of 12 ft (3.7 m).

Who owns Ia 346 over Etter Creek?

It is owned by the State Highway Agency.