US Bridges

SB US 59 over I-80

Good

Pottawattamie County, Iowa · At Jct. I-80 · Structure no. 000000000043480

Built
1965
60 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
239 ft
4 main spans
Daily traffic
2,850
2022 count
Owner
State
State Highway Agency

About this bridge

SB US 59 over I-80 is a prestressed concrete stringer/multi-beam or girder carrying SB US 59 over I-80 in Pottawattamie County, Iowa. It was built in 1965, so it is 60 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,850 vehicles a day, roughly 17% of them trucks, projected to reach 2,850 by 2044. The structure is 239 ft (72.8 m) long and 36 ft wide.

CarriesSB US 59
CrossesI-80
LocationAt Jct. I-80
RouteU.S. Route 59
StateIowa
Coordinates41.49792, -95.33666
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating81.1 US tons
Inventory rating28.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length239 ft (72.8 m)
Longest span69 ft (21 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,850 (2022)
Projected traffic2,850 by 2044
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 SB US 59 over I-80 built?

It was built in 1965, making it 60 years old in 2025.

What condition is SB US 59 over I-80 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does SB US 59 over I-80 carry?

About 2,850 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is SB US 59 over I-80?

The structure is 239 ft (72.8 m) long with a longest span of 69 ft (21 m) and a deck 36 ft wide.

Who owns SB US 59 over I-80?

It is owned by the State Highway Agency.