US Bridges

EB I-80 over Tamarack Road

Fair

Pottawattamie County, Iowa · 2.3 Mi. W of Jct. I-680 · Structure no. 000000000045370

Built
1969
56 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
167 ft
3 main spans
Daily traffic
11,300
2022 count
Owner
State
State Highway Agency

About this bridge

EB I-80 over Tamarack Road is a prestressed concrete stringer/multi-beam or girder carrying EB I-80 over Tamarack Road in Pottawattamie County, Iowa. It was built in 1969, so it is 56 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 11,300 vehicles a day, roughly 38% of them trucks, projected to reach 11,300 by 2042. The structure is 167 ft (50.9 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEB I-80
CrossesTamarack Road
Location2.3 Mi. W of Jct. I-680
RouteInterstate 80
CountyPottawattamie County
StateIowa
Coordinates41.46255, -95.59638
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.1 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length167 ft (50.9 m)
Longest span57 ft (17.4 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,300 (2022)
Projected traffic11,300 by 2042
Trucks38%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 EB I-80 over Tamarack Road built?

It was built in 1969, making it 56 years old in 2025.

What condition is EB I-80 over Tamarack Road 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 May 2023.

How much traffic does EB I-80 over Tamarack Road carry?

About 11,300 vehicles per day (2022 count), of which roughly 38% are trucks.

How long is EB I-80 over Tamarack Road?

The structure is 167 ft (50.9 m) long with a longest span of 57 ft (17.4 m) and a deck 42 ft wide.

Who owns EB I-80 over Tamarack Road?

It is owned by the State Highway Agency.