US Bridges

330th ST over Unnamed Creek

Good

Sioux County, Iowa · 096440401 · Structure no. 000000000311301

Built
2022
3 years old
Condition
Good
inspected March 2024
Type
Culvert
Steel
Length
26 ft
2 main spans
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

330th ST over Unnamed Creek is a steel culvert carrying 330th ST over Unnamed Creek in Sioux County, Iowa. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11 vehicles a day, projected to reach 11 by 2044. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries330th ST
CrossesUnnamed Creek
Location096440401
RouteCounty Highway 0
CountySioux County
StateIowa
Coordinates43.17171, -96.04955
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHL 93
Structure length26 ft (7.8 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic11 by 2044
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 330th ST over Unnamed Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is 330th ST over Unnamed 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 March 2024.

How much traffic does 330th ST over Unnamed Creek carry?

About 11 vehicles per day (2022 count).

How long is 330th ST over Unnamed Creek?

The structure is 26 ft (7.8 m) long with a longest span of 10 ft (3.2 m).

Who owns 330th ST over Unnamed Creek?

It is owned by the County Highway Agency.