US Bridges

390th ST over Prarie Creek

Good

Clay County, Iowa · 095370201 · Structure no. 000000000116281

Built
2006
19 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
20 ft
2 main spans
Daily traffic
21
2022 count
Owner
County
County Highway Agency

About this bridge

390th ST over Prarie Creek is a concrete culvert carrying 390th ST over Prarie Creek in Clay County, Iowa. It was built in 2006, so it is 19 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 21 vehicles a day, projected to reach 21 by 2043. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Carries390th ST
CrossesPrarie Creek
Location095370201
RouteCounty Highway 0
StateIowa
Coordinates43.08339, -95.17397
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 inspectionFebruary 2023
Inspection intervalevery 48 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 rating61.8 US tons
Inventory rating37.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2022)
Projected traffic21 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 390th ST over Prarie Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is 390th ST over Prarie 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 February 2023.

How much traffic does 390th ST over Prarie Creek carry?

About 21 vehicles per day (2022 count).

How long is 390th ST over Prarie Creek?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m).

Who owns 390th ST over Prarie Creek?

It is owned by the County Highway Agency.