US Bridges

EB I-80 over Iowa 149

Fair

Iowa County, Iowa · At Jct. Ia 149 · Structure no. 000000000029850

Built
1963
62 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
222 ft
4 main spans
Daily traffic
14,650
2023 count
Owner
State
State Highway Agency

About this bridge

EB I-80 over Iowa 149 is a prestressed concrete stringer/multi-beam or girder carrying EB I-80 over Iowa 149 in Iowa County, Iowa. It was built in 1963, so it is 62 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 14,650 vehicles a day, roughly 38% of them trucks, projected to reach 14,650 by 2044. The structure is 222 ft (67.7 m) long and 36 ft wide.

Location

Open in Google Maps
CarriesEB I-80
CrossesIowa 149
LocationAt Jct. Ia 149
RouteInterstate 80
CountyIowa County
StateIowa
Coordinates41.68703, -92.00855
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.4 US tons
Inventory rating25.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length222 ft (67.7 m)
Longest span65 ft (19.8 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,650 (2023)
Projected traffic14,650 by 2044
Trucks38%
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 EB I-80 over Iowa 149 built?

It was built in 1963, making it 62 years old in 2025.

What condition is EB I-80 over Iowa 149 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 November 2024.

How much traffic does EB I-80 over Iowa 149 carry?

About 14,650 vehicles per day (2023 count), of which roughly 38% are trucks.

How long is EB I-80 over Iowa 149?

The structure is 222 ft (67.7 m) long with a longest span of 65 ft (19.8 m) and a deck 36 ft wide.

Who owns EB I-80 over Iowa 149?

It is owned by the State Highway Agency.