US Bridges

150th ST over Small Stream

Good

Union County, Iowa · 073303401 · Structure no. 000000000326872

Built
2024
1 years old
Condition
Good
inspected October 2024
Type
Slab
Steel
Length
40 ft
1 main span
Daily traffic
21
2023 count
Owner
County
County Highway Agency

About this bridge

150th ST over Small Stream is a steel slab carrying 150th ST over Small Stream in Union County, Iowa. It was built in 2024, so it is 1 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 9 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 40 ft (12.2 m) long and 25 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
Carries150th ST
CrossesSmall Stream
Location073303401
RouteCounty Highway 0
CountyUnion County
StateIowa
Coordinates41.08534, -94.29499
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating70.5 US tons
Inventory rating42.3 US tons

Structure

Structure typeSlab
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2023)
Projected traffic21 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 150th ST over Small Stream built?

It was built in 2024, making it 1 years old in 2025.

What condition is 150th 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 2024.

How much traffic does 150th ST over Small Stream carry?

About 21 vehicles per day (2023 count).

How long is 150th ST over Small Stream?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 25 ft wide.

Who owns 150th ST over Small Stream?

It is owned by the County Highway Agency.