US Bridges

35th St. over South Fork Walnut Creek

Fair

Jones County, Iowa · 083041905 · Structure no. 000000000206835

Built
1979
46 years old, rebuilt 2013
Condition
Fair
inspected November 2023
Type
Channel Beam
Concrete
Length
25 ft
1 main span
Daily traffic
33
2022 count
Owner
County
County Highway Agency

About this bridge

35th St. over South Fork Walnut Creek is a concrete channel beam carrying 35th St. over South Fork Walnut Creek in Jones County, Iowa. It was built in 1979 and reconstructed in 2013, so it is 46 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 33 vehicles a day, projected to reach 33 by 2043. The structure is 25 ft (7.6 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries35th St.
CrossesSouth Fork Walnut Creek
Location083041905
RouteCounty Highway 0
StateIowa
Coordinates41.98406, -91.3474
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.5 US tons
Inventory rating25 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckWood or timber
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width22 ft (6.7 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33 (2022)
Projected traffic33 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 35th St. over South Fork Walnut Creek built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2013.

What condition is 35th St. over South Fork 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 November 2023.

How much traffic does 35th St. over South Fork Walnut Creek carry?

About 33 vehicles per day (2022 count).

How long is 35th St. over South Fork Walnut Creek?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 22 ft wide.

Who owns 35th St. over South Fork Walnut Creek?

It is owned by the County Highway Agency.