US Bridges

710th ST over I-80

Fair

Cass County, Iowa · 4.0 Mi. W of Iowa 148 · Structure no. 000000000018160

Built
1959
66 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
223 ft
4 main spans
Daily traffic
41
2022 count
Owner
State
State Highway Agency

About this bridge

710th ST over I-80 is a prestressed concrete stringer/multi-beam or girder carrying 710th ST over I-80 in Cass County, Iowa. It was built in 1959, so it is 66 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 41 vehicles a day, projected to reach 41 by 2043. The structure is 223 ft (68 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries710th ST
CrossesI-80
Location4.0 Mi. W of Iowa 148
RouteCounty Highway 0
StateIowa
Coordinates41.49679, -94.83499
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 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 alignment6: Equal to present minimum criteria
Operating rating47 US tons
Inventory rating20 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length223 ft (68 m)
Longest span65 ft (19.8 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic41 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 710th ST over I-80 built?

It was built in 1959, making it 66 years old in 2025.

What condition is 710th ST 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 February 2023.

How much traffic does 710th ST over I-80 carry?

About 41 vehicles per day (2022 count).

How long is 710th ST over I-80?

The structure is 223 ft (68 m) long with a longest span of 65 ft (19.8 m) and a deck 28 ft wide.

Who owns 710th ST over I-80?

It is owned by the State Highway Agency.