US Bridges

I 29 SB over I-80 & I-29 Interchange

Good

Pottawattamie County, Iowa · I-80 and Ramps · Structure no. 000000000700050

Built
2014
11 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,174 ft
11 main spans
Daily traffic
23,900
2022 count
Owner
State
State Highway Agency

About this bridge

I 29 SB over I-80 & I-29 Interchange is a steel continuous stringer/multi-beam or girder carrying I 29 SB over I-80 & I-29 Interchange in Pottawattamie County, Iowa. It was built in 2014, so it is 11 years old, younger 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 23,900 vehicles a day, roughly 15% of them trucks, projected to reach 23,900 by 2044. The structure is 2,174 ft (662.6 m) long and 51 ft wide.

CarriesI 29 SB
CrossesI-80 & I-29 Interchange
LocationI-80 and Ramps
RouteInterstate 29
StateIowa
Coordinates41.23657, -95.90052
Functional classUrban Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating40.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHL 93
Structure length2,174 ft (662.6 m)
Longest span248 ft (75.6 m)
Deck width51 ft (15.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic23,900 (2022)
Projected traffic23,900 by 2044
Trucks15%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 I 29 SB over I-80 & I-29 Interchange built?

It was built in 2014, making it 11 years old in 2025.

What condition is I 29 SB over I-80 & I-29 Interchange 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 October 2024.

How much traffic does I 29 SB over I-80 & I-29 Interchange carry?

About 23,900 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is I 29 SB over I-80 & I-29 Interchange?

The structure is 2,174 ft (662.6 m) long with a longest span of 248 ft (75.6 m) and a deck 51 ft wide.

Who owns I 29 SB over I-80 & I-29 Interchange?

It is owned by the State Highway Agency.