US Bridges

35th St. over So Fork Walnut

Fair

Jones County, Iowa · 083041903 · Structure no. 000000000206831

Built
1990
35 years old
Condition
Fair
inspected January 2023
Type
Tee Beam
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
33
2022 count
Owner
County
County Highway Agency

About this bridge

35th St. over So Fork Walnut is a prestressed concrete tee beam carrying 35th St. over So Fork Walnut 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 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 26 ft (7.9 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries35th St.
CrossesSo Fork Walnut
Location083041903
RouteCounty Highway 0
StateIowa
Coordinates41.98401, -91.35101
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 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 closed1.9 mi (3 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 35th St. over So Fork Walnut built?

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

What condition is 35th St. over So Fork Walnut 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 January 2023.

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

About 33 vehicles per day (2022 count).

How long is 35th St. over So Fork Walnut?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 24 ft wide.

Who owns 35th St. over So Fork Walnut?

It is owned by the County Highway Agency.