US Bridges

270th Street over I 880

Fair

Pottawattamie County, Iowa · 3.5 Mi. W of Jct. Ia 191 · Structure no. 000000000044460

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
227 ft
4 main spans
Daily traffic
34
2022 count
Owner
State
State Highway Agency

About this bridge

270th Street over I 880 is a prestressed concrete stringer/multi-beam or girder carrying 270th Street over I 880 in Pottawattamie 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 6 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 34 vehicles a day, roughly 24% of them trucks, projected to reach 34 by 2042. The structure is 227 ft (69.2 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries270th Street
CrossesI 880
Location3.5 Mi. W of Jct. Ia 191
RouteCounty Highway 0
StateIowa
Coordinates41.49791, -95.66992
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.8 US tons
Inventory rating26.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length227 ft (69.2 m)
Longest span69 ft (21 m)
Deck width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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 270th Street over I 880 built?

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

What condition is 270th Street over I 880 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 April 2023.

How much traffic does 270th Street over I 880 carry?

About 34 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is 270th Street over I 880?

The structure is 227 ft (69.2 m) long with a longest span of 69 ft (21 m) and a deck 32 ft wide.

Who owns 270th Street over I 880?

It is owned by the State Highway Agency.