US Bridges

Ia 346 over US 218

Good

Chickasaw County, Iowa · At Jct. of US 218 · Structure no. 000000000608300

Built
2003
22 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
322 ft
4 main spans
Daily traffic
2,120
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 346 over US 218 is a prestressed concrete stringer/multi-beam or girder carrying Ia 346 over US 218 in Chickasaw County, Iowa. It was built in 2003, so it is 22 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 2,120 vehicles a day, roughly 14% of them trucks, projected to reach 2,120 by 2044. The structure is 322 ft (98.1 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 346
CrossesUS 218
LocationAt Jct. of US 218
RouteState Highway 346
CountyChickasaw County
StateIowa
Coordinates42.95204, -92.55109
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.5 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length322 ft (98.1 m)
Longest span112 ft (34.1 m)
Deck width62 ft (19 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,120 (2022)
Projected traffic2,120 by 2044
Trucks14%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ia 346 over US 218 built?

It was built in 2003, making it 22 years old in 2025.

What condition is Ia 346 over US 218 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 September 2024.

How much traffic does Ia 346 over US 218 carry?

About 2,120 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Ia 346 over US 218?

The structure is 322 ft (98.1 m) long with a longest span of 112 ft (34.1 m) and a deck 62 ft wide.

Who owns Ia 346 over US 218?

It is owned by the State Highway Agency.