US Bridges

390th ST over Small Stream

Fair

Crawford County, Iowa · 082372502 · Structure no. 000000000126252

Built
2007
18 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

390th ST over Small Stream is a steel stringer/multi-beam or girder carrying 390th ST over Small Stream in Crawford County, Iowa. It was built in 2007, so it is 18 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 35 vehicles a day, roughly 37% of them trucks, projected to reach 35 by 2043. The structure is 34 ft (10.4 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries390th ST
CrossesSmall Stream
Location082372502
RouteCounty Highway 0
CountyCrawford County
StateIowa
Coordinates41.88014, -95.11232
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.4 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width25 ft (7.5 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)
Projected traffic35 by 2043
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 390th ST over Small Stream built?

It was built in 2007, making it 18 years old in 2025.

What condition is 390th ST over Small Stream in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does 390th ST over Small Stream carry?

About 35 vehicles per day (2022 count), of which roughly 37% are trucks.

How long is 390th ST over Small Stream?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 25 ft wide.

Who owns 390th ST over Small Stream?

It is owned by the County Highway Agency.