US Bridges

I 29 NB over UP RR

Fair

Woodbury County, Iowa · 1.9 Mi. S. of N. Jct. 75 · Structure no. 000000000053711

Built
2014
11 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
183 ft
3 main spans
Daily traffic
14,300
2022 count
Owner
State
State Highway Agency

About this bridge

I 29 NB over UP RR is a prestressed concrete stringer/multi-beam or girder carrying I 29 NB over UP RR in Woodbury 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 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 14,300 vehicles a day, roughly 20% of them trucks, projected to reach 14,300 by 2043. The structure is 183 ft (55.9 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 29 NB
CrossesUP RR
Location1.9 Mi. S. of N. Jct. 75
RouteInterstate 29
CountyWoodbury County
StateIowa
Coordinates42.40882, -96.36586
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length183 ft (55.9 m)
Longest span69 ft (21 m)
Deck width65 ft (19.7 m)
Roadway width61 ft (18.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,300 (2022)
Projected traffic14,300 by 2043
Trucks20%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 I 29 NB over UP RR built?

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

What condition is I 29 NB over UP RR 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 January 2023.

How much traffic does I 29 NB over UP RR carry?

About 14,300 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is I 29 NB over UP RR?

The structure is 183 ft (55.9 m) long with a longest span of 69 ft (21 m) and a deck 65 ft wide.

Who owns I 29 NB over UP RR?

It is owned by the State Highway Agency.