US Bridges

360th ST over Small Stream

Good

Sioux County, Iowa · 096442301 · Structure no. 000000000366330

Built
2017
8 years old
Condition
Good
inspected October 2023
Type
Culvert
Steel
Length
22 ft
2 main spans
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

360th ST over Small Stream is a steel culvert carrying 360th ST over Small Stream in Sioux County, Iowa. It was built in 2017, so it is 8 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 45 vehicles a day, projected to reach 45 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries360th ST
CrossesSmall Stream
Location096442301
RouteCounty Highway 0
CountySioux County
StateIowa
Coordinates43.12789, -96.00886
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.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal 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 length22 ft (6.7 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 360th ST over Small Stream built?

It was built in 2017, making it 8 years old in 2025.

What condition is 360th ST over Small Stream 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 October 2023.

How much traffic does 360th ST over Small Stream carry?

About 45 vehicles per day (2022 count).

How long is 360th ST over Small Stream?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.3 m).

Who owns 360th ST over Small Stream?

It is owned by the County Highway Agency.