US Bridges

6th ST over Walnut Creek

Fair

Appanoose County, Iowa · 069181700 · Structure no. 000000000008477

Built
1974
51 years old
Condition
Fair
inspected October 2022
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
160
2022 count
Owner
County
County Highway Agency

About this bridge

6th ST over Walnut Creek is a concrete continuous culvert carrying 6th ST over Walnut Creek in Appanoose County, Iowa. It was built in 1974, so it is 51 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 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 160 vehicles a day, projected to reach 160 by 2043. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries6th ST
CrossesWalnut Creek
Location069181700
RouteCity Street 0
CountyAppanoose County
StateIowa
Coordinates40.77585, -92.94934
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 inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2022)
Projected traffic160 by 2043
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 6th ST over Walnut Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is 6th ST 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 October 2022.

How much traffic does 6th ST over Walnut Creek carry?

About 160 vehicles per day (2022 count).

How long is 6th ST over Walnut Creek?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns 6th ST over Walnut Creek?

It is owned by the County Highway Agency.