US Bridges

I-80 over N.Fk. English River

Fair

Poweshiek County, Iowa · 1.9 Mi. E of Jct. Ia 146 · Structure no. 000000000046090

Built
1963
62 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
28,500
2023 count
Owner
State
State Highway Agency

About this bridge

I-80 over N.Fk. English River is a concrete continuous culvert carrying I-80 over N.Fk. English River in Poweshiek County, Iowa. It was built in 1963, so it is 62 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 28,500 vehicles a day, roughly 39% of them trucks, projected to reach 28,500 by 2043. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-80
CrossesN.Fk. English River
Location1.9 Mi. E of Jct. Ia 146
RouteInterstate 80
CountyPoweshiek County
StateIowa
Coordinates41.69529, -92.69017
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.5 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,500 (2023)
Projected traffic28,500 by 2043
Trucks39%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-80 over N.Fk. English River built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-80 over N.Fk. English River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does I-80 over N.Fk. English River carry?

About 28,500 vehicles per day (2023 count), of which roughly 39% are trucks.

How long is I-80 over N.Fk. English River?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).

Who owns I-80 over N.Fk. English River?

It is owned by the State Highway Agency.