US Bridges

I 29 NB over Ia 2

Fair

Fremont County, Iowa · At Jct. Iowa 2 · Structure no. 000000000600090

Built
1972
53 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
218 ft
3 main spans
Daily traffic
4,500
2022 count
Owner
State
State Highway Agency

About this bridge

I 29 NB over Ia 2 is a steel continuous stringer/multi-beam or girder carrying I 29 NB over Ia 2 in Fremont County, Iowa. It was built in 1972, so it is 53 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 4,500 vehicles a day, roughly 35% of them trucks, projected to reach 4,500 by 2043. The structure is 218 ft (66.4 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesI 29 NB
CrossesIa 2
LocationAt Jct. Iowa 2
RouteInterstate 29
CountyFremont County
StateIowa
Coordinates40.68896, -95.78265
Functional classRural Principal Arterial - Interstate

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.5 US tons
Inventory rating32.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length218 ft (66.4 m)
Longest span102 ft (31.1 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2022)
Projected traffic4,500 by 2043
Trucks35%
Lanes on structure2
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 NB over Ia 2 built?

It was built in 1972, making it 53 years old in 2025.

What condition is I 29 NB over Ia 2 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 August 2023.

How much traffic does I 29 NB over Ia 2 carry?

About 4,500 vehicles per day (2022 count), of which roughly 35% are trucks.

How long is I 29 NB over Ia 2?

The structure is 218 ft (66.4 m) long with a longest span of 102 ft (31.1 m) and a deck 44 ft wide.

Who owns I 29 NB over Ia 2?

It is owned by the State Highway Agency.