US Bridges

Ia 148 over I-80

Fair

Cass County, Iowa · At JCT.80 · Structure no. 000000000018200

Built
1958
67 years old, rebuilt 1977
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
218 ft
4 main spans
Daily traffic
410
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 148 over I-80 is a prestressed concrete stringer/multi-beam or girder carrying Ia 148 over I-80 in Cass County, Iowa. It was built in 1958 and reconstructed in 1977, 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 410 vehicles a day, roughly 16% of them trucks, projected to reach 410 by 2042. The structure is 218 ft (66.4 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIa 148
CrossesI-80
LocationAt JCT.80
RouteState Highway 148
CountyCass County
StateIowa
Coordinates41.49668, -94.75816
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.1 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length218 ft (66.4 m)
Longest span65 ft (19.8 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic410 (2022)
Projected traffic410 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

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 Ia 148 over I-80 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1977.

What condition is Ia 148 over I-80 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 March 2023.

How much traffic does Ia 148 over I-80 carry?

About 410 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Ia 148 over I-80?

The structure is 218 ft (66.4 m) long with a longest span of 65 ft (19.8 m) and a deck 34 ft wide.

Who owns Ia 148 over I-80?

It is owned by the State Highway Agency.