US Bridges

NB I-29 over Lambert Ave

Good

Mills County, Iowa · S Jct. of U.S. 34 · Structure no. 000000000036251

Built
2011
14 years old
Condition
Good
inspected December 2024
Type
Slab
Concrete Continuous
Length
153 ft
3 main spans
Daily traffic
6,600
2022 count
Owner
State
State Highway Agency

About this bridge

NB I-29 over Lambert Ave is a concrete continuous slab carrying NB I-29 over Lambert Ave in Mills County, Iowa. It was built in 2011, so it is 14 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,600 vehicles a day, roughly 31% of them trucks, projected to reach 6,600 by 2044. The structure is 153 ft (46.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB I-29
CrossesLambert Ave
LocationS Jct. of U.S. 34
RouteInterstate 29
CountyMills County
StateIowa
Coordinates41.00152, -95.80624
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length153 ft (46.7 m)
Longest span59 ft (18 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,600 (2022)
Projected traffic6,600 by 2044
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 Lambert Ave built?

It was built in 2011, making it 14 years old in 2025.

What condition is NB I-29 over Lambert Ave 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 December 2024.

How much traffic does NB I-29 over Lambert Ave carry?

About 6,600 vehicles per day (2022 count), of which roughly 31% are trucks.

How long is NB I-29 over Lambert Ave?

The structure is 153 ft (46.7 m) long with a longest span of 59 ft (18 m) and a deck 43 ft wide.

Who owns NB I-29 over Lambert Ave?

It is owned by the State Highway Agency.