US Bridges

566th Ave over Walnut Creek

Fair

Story County, Iowa · 0.2 MI N 290th ST · Structure no. 000000000505760

Built
1987
38 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
70 ft
3 main spans
Daily traffic
—
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

566th Ave over Walnut Creek is a concrete continuous culvert carrying 566th Ave over Walnut Creek in Story County, Iowa. It was built in 1987, so it is 38 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.

No traffic count is recorded. The structure is 70 ft (21.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries566th Ave
CrossesWalnut Creek
Location0.2 MI N 290th ST
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates41.93885, -93.56553
Functional classRural Local

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 inspectionApril 2024
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 alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating32.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span23 ft (6.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 566th Ave over Walnut Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is 566th Ave over Walnut Creek 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 April 2024.

How much traffic does 566th Ave over Walnut Creek carry?

No traffic count is recorded for this structure.

How long is 566th Ave over Walnut Creek?

The structure is 70 ft (21.3 m) long with a longest span of 23 ft (6.9 m).

Who owns 566th Ave over Walnut Creek?

It is owned by the City or Municipal Highway Agency.