US Bridges

Local Road over Walnut Creek

Fair

Washington County, Iowa · 074080405 · Structure no. 000000000335890

Built
1962
63 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

Local Road over Walnut Creek is a concrete continuous culvert carrying Local Road over Walnut Creek in Washington County, Iowa. It was built in 1962, so it is 63 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 40 vehicles a day, projected to reach 40 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLocal Road
CrossesWalnut Creek
Location074080405
RouteCounty Highway 0
CountyWashington County
StateIowa
Coordinates41.23674, -91.78018
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating34 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length22 ft (6.7 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 traffic40 (2022)
Projected traffic40 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Local Road over Walnut Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Local Road 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 February 2023.

How much traffic does Local Road over Walnut Creek carry?

About 40 vehicles per day (2022 count).

How long is Local Road over Walnut Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns Local Road over Walnut Creek?

It is owned by the County Highway Agency.