US Bridges

230th Ave. over S Fork Walnut Creek

Good

Jones County, Iowa · 083041606 · Structure no. 000000000206801

Built
1990
35 years old
Condition
Good
inspected January 2021
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
47
2022 count
Owner
County
County Highway Agency

About this bridge

230th Ave. over S Fork Walnut Creek is a concrete continuous slab carrying 230th Ave. over S Fork Walnut Creek in Jones County, Iowa. It was built in 1990, so it is 35 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 47 vehicles a day, projected to reach 47 by 2043. The structure is 103 ft (31.4 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries230th Ave.
CrossesS Fork Walnut Creek
Location083041606
RouteCounty Highway 0
CountyJones County
StateIowa
Coordinates41.99203, -91.32757
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating52.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length103 ft (31.4 m)
Longest span39 ft (11.9 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47 (2022)
Projected traffic47 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 230th Ave. over S Fork Walnut Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is 230th Ave. over S Fork Walnut Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2021.

How much traffic does 230th Ave. over S Fork Walnut Creek carry?

About 47 vehicles per day (2022 count).

How long is 230th Ave. over S Fork Walnut Creek?

The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 27 ft wide.

Who owns 230th Ave. over S Fork Walnut Creek?

It is owned by the County Highway Agency.