US Bridges

Lambert Ave over Small Natural Stream

Fair

Mills County, Iowa · 1.9 MI W of I-29/U.S. #34 · Structure no. 000000000035700

Built
1947
78 years old, rebuilt 1972
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
468
2022 count
Owner
County
County Highway Agency

About this bridge

Lambert Ave over Small Natural Stream is a steel stringer/multi-beam or girder carrying Lambert Ave over Small Natural Stream in Mills County, Iowa. It was built in 1947 and reconstructed in 1972, so it is 78 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 468 vehicles a day, roughly 8% of them trucks, projected to reach 468 by 2043. The structure is 42 ft (12.8 m) long and 32 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesLambert Ave
CrossesSmall Natural Stream
Location1.9 MI W of I-29/U.S. #34
RouteCounty Highway 0
CountyMills County
StateIowa
Coordinates41.00166, -95.84275
Functional classRural Minor Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45.2 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic468 (2022)
Projected traffic468 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lambert Ave over Small Natural Stream built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1972.

What condition is Lambert Ave over Small Natural Stream 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 March 2023.

How much traffic does Lambert Ave over Small Natural Stream carry?

About 468 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Lambert Ave over Small Natural Stream?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 32 ft wide.

Who owns Lambert Ave over Small Natural Stream?

It is owned by the County Highway Agency.