US Bridges

230th Street over South Branch

Fair

Page County, Iowa · 068371303 · Structure no. 000000000265571

Built
1999
26 years old
Condition
Fair
inspected November 2022
Type
Tee Beam
Prestressed Concrete
Length
68 ft
3 main spans
Daily traffic
5
2022 count
Owner
County
County Highway Agency

About this bridge

230th Street over South Branch is a prestressed concrete tee beam carrying 230th Street over South Branch in Page County, Iowa. It was built in 1999, so it is 26 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 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 5 vehicles a day, projected to reach 5 by 2042. The structure is 68 ft (20.7 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries230th Street
CrossesSouth Branch
Location068371303
RouteCounty Highway 0
StateIowa
Coordinates40.7101, -95.02921
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating22.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span28 ft (8.5 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic5 by 2042
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 230th Street over South Branch built?

It was built in 1999, making it 26 years old in 2025.

What condition is 230th Street over South Branch 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 2022.

How much traffic does 230th Street over South Branch carry?

About 5 vehicles per day (2022 count).

How long is 230th Street over South Branch?

The structure is 68 ft (20.7 m) long with a longest span of 28 ft (8.5 m) and a deck 25 ft wide.

Who owns 230th Street over South Branch?

It is owned by the County Highway Agency.