US Bridges

150th ST over Small Stream

Good

Buchanan County, Iowa · 090073103 · Structure no. 000000000083451

Built
2018
7 years old
Condition
Good
inspected April 2023
Type
Other
Steel
Length
68 ft
1 main span
Daily traffic
60
2021 count
Owner
County
County Highway Agency

About this bridge

150th ST over Small Stream is a steel other carrying 150th ST over Small Stream in Buchanan County, Iowa. It was built in 2018, so it is 7 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 60 vehicles a day, projected to reach 60 by 2043. The structure is 68 ft (20.7 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries150th ST
CrossesSmall Stream
Location090073103
RouteCounty Highway 0
CountyBuchanan County
StateIowa
Coordinates42.57053, -91.70919
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating33.5 US tons

Structure

Structure typeOther
MaterialSteel
DeckOther
Main spans1
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span68 ft (20.7 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2021)
Projected traffic60 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 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 150th ST over Small Stream built?

It was built in 2018, making it 7 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 April 2023.

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

About 60 vehicles per day (2021 count).

How long is 150th ST over Small Stream?

The structure is 68 ft (20.7 m) long with a longest span of 68 ft (20.7 m) and a deck 29 ft wide.

Who owns 150th ST over Small Stream?

It is owned by the County Highway Agency.