US Bridges

NW 158th Ave over Turkey Creek Tributary

Fair

Polk County, Iowa · 081251101 · Structure no. 000000000364005

Built
1997
28 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
162
2022 count
Owner
County
County Highway Agency

About this bridge

NW 158th Ave over Turkey Creek Tributary is a concrete continuous culvert carrying NW 158th Ave over Turkey Creek Tributary in Polk County, Iowa. It was built in 1997, so it is 28 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 162 vehicles a day, projected to reach 162 by 2042. The structure is 25 ft (7.6 m) long.

Location

Open in Google Maps
CarriesNW 158th Ave
CrossesTurkey Creek Tributary
Location081251101
RouteCounty Highway 0
CountyPolk County
StateIowa
Coordinates41.84939, -93.72374
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic162 (2022)
Projected traffic162 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 NW 158th Ave over Turkey Creek Tributary built?

It was built in 1997, making it 28 years old in 2025.

What condition is NW 158th Ave over Turkey Creek Tributary 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 May 2023.

How much traffic does NW 158th Ave over Turkey Creek Tributary carry?

About 162 vehicles per day (2022 count).

How long is NW 158th Ave over Turkey Creek Tributary?

The structure is 25 ft (7.6 m) long with a longest span of 13 ft (4 m).

Who owns NW 158th Ave over Turkey Creek Tributary?

It is owned by the County Highway Agency.