US Bridges

WB I-80 over Fourmile Creek

Fair

Polk County, Iowa · 1.4 Mile E of E JCT I-35 · Structure no. 000000000041980

Built
1959
66 years old, rebuilt 1992
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
191 ft
3 main spans
Daily traffic
44,500
2022 count
Owner
State
State Highway Agency

About this bridge

WB I-80 over Fourmile Creek is a prestressed concrete stringer/multi-beam or girder carrying WB I-80 over Fourmile Creek in Polk County, Iowa. It was built in 1959 and reconstructed in 1992, so it is 66 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 44,500 vehicles a day, roughly 18% of them trucks, projected to reach 44,500 by 2042. The structure is 191 ft (58.2 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWB I-80
CrossesFourmile Creek
Location1.4 Mile E of E JCT I-35
RouteInterstate 80
StateIowa
Coordinates41.65664, -93.54558
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.8 US tons
Inventory rating34.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length191 ft (58.2 m)
Longest span69 ft (21 m)
Deck width59 ft (18.1 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,500 (2022)
Projected traffic44,500 by 2042
Trucks18%
Lanes on structure3
Traffic directionOne-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 WB I-80 over Fourmile Creek built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1992.

What condition is WB I-80 over Fourmile Creek 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 WB I-80 over Fourmile Creek carry?

About 44,500 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is WB I-80 over Fourmile Creek?

The structure is 191 ft (58.2 m) long with a longest span of 69 ft (21 m) and a deck 59 ft wide.

Who owns WB I-80 over Fourmile Creek?

It is owned by the State Highway Agency.