US Bridges

EB I-80 over 570th ST

Fair

Cass County, Iowa · 2.0 Mi. W of Jct. Ia 173 · Structure no. 000000000017980

Built
1966
59 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
115 ft
3 main spans
Daily traffic
11,750
2022 count
Owner
State
State Highway Agency

About this bridge

EB I-80 over 570th ST is a concrete slab carrying EB I-80 over 570th ST in Cass County, Iowa. It was built in 1966, so it is 59 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 11,750 vehicles a day, roughly 41% of them trucks, projected to reach 11,750 by 2042. The structure is 115 ft (35.1 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
Crosses570th ST
Location2.0 Mi. W of Jct. Ia 173
RouteInterstate 80
CountyCass County
StateIowa
Coordinates41.49815, -95.09894
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.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55.2 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span39 ft (11.9 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,750 (2022)
Projected traffic11,750 by 2042
Trucks41%
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 570th ST built?

It was built in 1966, making it 59 years old in 2025.

What condition is EB I-80 over 570th ST 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 EB I-80 over 570th ST carry?

About 11,750 vehicles per day (2022 count), of which roughly 41% are trucks.

How long is EB I-80 over 570th ST?

The structure is 115 ft (35.1 m) long with a longest span of 39 ft (11.9 m) and a deck 42 ft wide.

Who owns EB I-80 over 570th ST?

It is owned by the State Highway Agency.