US Bridges

330th ST over Small Un-Named Creek

Good

O'Brien County, Iowa · 096400101 · Structure no. 000000000260801

Built
2004
21 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
35 ft
2 main spans
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

330th ST over Small Un-Named Creek is a concrete culvert carrying 330th ST over Small Un-Named Creek in O'Brien County, Iowa. It was built in 2004, so it is 21 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 62 vehicles a day, projected to reach 62 by 2044. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Carries330th ST
CrossesSmall Un-Named Creek
Location096400101
RouteCounty Highway 0
StateIowa
Coordinates43.17074, -95.52114
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)
Projected traffic62 by 2044
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 330th ST over Small Un-Named Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is 330th ST over Small Un-Named 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 May 2024.

How much traffic does 330th ST over Small Un-Named Creek carry?

About 62 vehicles per day (2022 count).

How long is 330th ST over Small Un-Named Creek?

The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.2 m).

Who owns 330th ST over Small Un-Named Creek?

It is owned by the County Highway Agency.