US Bridges

350th Ave over Small Creek

Good

Sioux County, Iowa · 096451301 · Structure no. 000000000311642

Built
2013
12 years old
Condition
Good
inspected January 2024
Type
Culvert
Steel
Length
31 ft
2 main spans
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

350th Ave over Small Creek is a steel culvert carrying 350th Ave over Small Creek in Sioux County, Iowa. It was built in 2013, so it is 12 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 30 vehicles a day, projected to reach 30 by 2044. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries350th Ave
CrossesSmall Creek
Location096451301
RouteCounty Highway 0
CountySioux County
StateIowa
Coordinates43.14281, -96.11677
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 inspectionJanuary 2024
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 loadHS 20
Structure length31 ft (9.4 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 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 350th Ave over Small Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is 350th Ave over Small 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 January 2024.

How much traffic does 350th Ave over Small Creek carry?

About 30 vehicles per day (2022 count).

How long is 350th Ave over Small Creek?

The structure is 31 ft (9.4 m) long with a longest span of 13 ft (4 m).

Who owns 350th Ave over Small Creek?

It is owned by the County Highway Agency.