US Bridges

WB I-80 over Antique Country Dr.

Fair

Adair County, Iowa · 3.5 Mi. W of Jct. Ia 25 · Structure no. 000000000013170

Built
1958
67 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
124 ft
3 main spans
Daily traffic
12,150
2022 count
Owner
State
State Highway Agency

About this bridge

WB I-80 over Antique Country Dr. is a prestressed concrete stringer/multi-beam or girder carrying WB I-80 over Antique Country Dr. in Adair County, Iowa. It was built in 1958, so it is 67 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 5 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 12,150 vehicles a day, roughly 40% of them trucks, projected to reach 12,150 by 2042. The structure is 124 ft (37.8 m) long and 46 ft wide.

CarriesWB I-80
CrossesAntique Country Dr.
Location3.5 Mi. W of Jct. Ia 25
RouteInterstate 80
StateIowa
Coordinates41.49632, -94.51978
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating45.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length124 ft (37.8 m)
Longest span44 ft (13.4 m)
Deck width46 ft (14.1 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,150 (2022)
Projected traffic12,150 by 2042
Trucks40%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 WB I-80 over Antique Country Dr. built?

It was built in 1958, making it 67 years old in 2025.

What condition is WB I-80 over Antique Country Dr. 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 February 2023.

How much traffic does WB I-80 over Antique Country Dr. carry?

About 12,150 vehicles per day (2022 count), of which roughly 40% are trucks.

How long is WB I-80 over Antique Country Dr.?

The structure is 124 ft (37.8 m) long with a longest span of 44 ft (13.4 m) and a deck 46 ft wide.

Who owns WB I-80 over Antique Country Dr.?

It is owned by the State Highway Agency.