US Bridges

430 TH over Stream

Fair

Worth County, Iowa · 099202301 · Structure no. 000000000356100

Built
1968
57 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

430 TH over Stream is a concrete slab carrying 430 TH over Stream in Worth County, Iowa. It was built in 1968, so it is 57 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 25 vehicles a day, projected to reach 25 by 2043. The structure is 33 ft (10.1 m) long and 30 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
Carries430 TH
CrossesStream
Location099202301
RouteCounty Highway 0
CountyWorth County
StateIowa
Coordinates43.38588, -93.17104
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating72 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic25 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 430 TH over Stream built?

It was built in 1968, making it 57 years old in 2025.

What condition is 430 TH over Stream 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 430 TH over Stream carry?

About 25 vehicles per day (2022 count).

How long is 430 TH over Stream?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.

Who owns 430 TH over Stream?

It is owned by the County Highway Agency.