US Bridges

I 80 EB over W38 (black Hawk Ave)

Fair

Johnson County, Iowa · 5.5 Mi. E of U.S. 151 · Structure no. 000000000031930

Built
1964
61 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
16,250
2023 count
Owner
State
State Highway Agency

About this bridge

I 80 EB over W38 (black Hawk Ave) is a prestressed concrete stringer/multi-beam or girder carrying I 80 EB over W38 (black Hawk Ave) in Johnson County, Iowa. It was built in 1964, so it is 61 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 16,250 vehicles a day, roughly 35% of them trucks, projected to reach 16,250 by 2043. The structure is 133 ft (40.5 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 80 EB
CrossesW38 (black Hawk Ave)
Location5.5 Mi. E of U.S. 151
RouteInterstate 80
StateIowa
Coordinates41.68763, -91.80414
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating81.9 US tons
Inventory rating39.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span52 ft (15.9 m)
Deck width49 ft (14.9 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,250 (2023)
Projected traffic16,250 by 2043
Trucks35%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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 EB over W38 (black Hawk Ave) built?

It was built in 1964, making it 61 years old in 2025.

What condition is I 80 EB over W38 (black Hawk Ave) 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 January 2024.

How much traffic does I 80 EB over W38 (black Hawk Ave) carry?

About 16,250 vehicles per day (2023 count), of which roughly 35% are trucks.

How long is I 80 EB over W38 (black Hawk Ave)?

The structure is 133 ft (40.5 m) long with a longest span of 52 ft (15.9 m) and a deck 49 ft wide.

Who owns I 80 EB over W38 (black Hawk Ave)?

It is owned by the State Highway Agency.