US Bridges

NB I-29 over Pigeon Creek

Good

Pottawattamie County, Iowa · 1.4 Mi. S of S Jct. I-680 · Structure no. 000000000044901

Built
2004
21 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
366 ft
3 main spans
Daily traffic
8,250
2022 count
Owner
State
State Highway Agency

About this bridge

NB I-29 over Pigeon Creek is a prestressed concrete stringer/multi-beam or girder carrying NB I-29 over Pigeon Creek in Pottawattamie County, Iowa. It was built in 2004, so it is 21 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 8,250 vehicles a day, roughly 18% of them trucks, projected to reach 8,250 by 2043. The structure is 366 ft (111.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNB I-29
CrossesPigeon Creek
Location1.4 Mi. S of S Jct. I-680
RouteInterstate 29
CountyPottawattamie County
StateIowa
Coordinates41.33574, -95.88799
Functional classRural 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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating48.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length366 ft (111.6 m)
Longest span122 ft (37.2 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,250 (2022)
Projected traffic8,250 by 2043
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 NB I-29 over Pigeon Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is NB I-29 over Pigeon Creek 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 January 2023.

How much traffic does NB I-29 over Pigeon Creek carry?

About 8,250 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is NB I-29 over Pigeon Creek?

The structure is 366 ft (111.6 m) long with a longest span of 122 ft (37.2 m) and a deck 44 ft wide.

Who owns NB I-29 over Pigeon Creek?

It is owned by the State Highway Agency.