US Bridges

NB I35 EB I80 over NS RR & Ia 141

Fair

Polk County, Iowa · At the Jct. Ia 141 · Structure no. 000000000041350

Built
1958
67 years old, rebuilt 1998
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
252 ft
4 main spans
Daily traffic
36,100
2023 count
Owner
State
State Highway Agency

About this bridge

NB I35 EB I80 over NS RR & Ia 141 is a prestressed concrete stringer/multi-beam or girder carrying NB I35 EB I80 over NS RR & Ia 141 in Polk County, Iowa. It was built in 1958 and reconstructed in 1998, 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 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 36,100 vehicles a day, roughly 22% of them trucks, projected to reach 36,100 by 2043. The structure is 252 ft (76.8 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNB I35 EB I80
CrossesNS RR & Ia 141
LocationAt the Jct. Ia 141
RouteInterstate 80
CountyPolk County
StateIowa
Coordinates41.64874, -93.77405
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating79.8 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length252 ft (76.8 m)
Longest span69 ft (21 m)
Deck width67 ft (20.4 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,100 (2023)
Projected traffic36,100 by 2043
Trucks22%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
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 NB I35 EB I80 over NS RR & Ia 141 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1998.

What condition is NB I35 EB I80 over NS RR & Ia 141 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 April 2023.

How much traffic does NB I35 EB I80 over NS RR & Ia 141 carry?

About 36,100 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is NB I35 EB I80 over NS RR & Ia 141?

The structure is 252 ft (76.8 m) long with a longest span of 69 ft (21 m) and a deck 67 ft wide.

Who owns NB I35 EB I80 over NS RR & Ia 141?

It is owned by the State Highway Agency.