US Bridges

I 80 WB over Ia 146

Good

Poweshiek County, Iowa · West I-80 over HWY 146 · Structure no. 000000000046061

Built
2023
2 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
250 ft
2 main spans
Daily traffic
13,100
2022 count
Owner
State
State Highway Agency

About this bridge

I 80 WB over Ia 146 is a prestressed concrete stringer/multi-beam or girder carrying I 80 WB over Ia 146 in Poweshiek County, Iowa. It was built in 2023, so it is 2 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 13,100 vehicles a day, roughly 40% of them trucks, projected to reach 13,100 by 2042. The structure is 250 ft (76.2 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 80 WB
CrossesIa 146
LocationWest I-80 over HWY 146
RouteInterstate 80
CountyPoweshiek County
StateIowa
Coordinates41.69633, -92.7267
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length250 ft (76.2 m)
Longest span131 ft (39.9 m)
Deck width63 ft (19.3 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,100 (2022)
Projected traffic13,100 by 2042
Trucks40%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 80 WB over Ia 146 built?

It was built in 2023, making it 2 years old in 2025.

What condition is I 80 WB over Ia 146 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 June 2023.

How much traffic does I 80 WB over Ia 146 carry?

About 13,100 vehicles per day (2022 count), of which roughly 40% are trucks.

How long is I 80 WB over Ia 146?

The structure is 250 ft (76.2 m) long with a longest span of 131 ft (39.9 m) and a deck 63 ft wide.

Who owns I 80 WB over Ia 146?

It is owned by the State Highway Agency.