US Bridges

270th ST over Small Stream

Good

Buchanan County, Iowa · 3540008807 · Structure no. 000000000366645

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Culvert
Steel
Length
25 ft
2 main spans
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

270th ST over Small Stream is a steel culvert carrying 270th ST over Small Stream in Buchanan County, Iowa. It was built in 2021, so it is 4 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 15 vehicles a day, projected to reach 15 by 2043. The structure is 25 ft (7.6 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries270th ST
CrossesSmall Stream
Location3540008807
RouteCounty Highway 0
CountyBuchanan County
StateIowa
Coordinates42.39863, -91.62949
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHL 93
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 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 270th ST over Small Stream built?

It was built in 2021, making it 4 years old in 2025.

What condition is 270th 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 May 2023.

How much traffic does 270th ST over Small Stream carry?

About 15 vehicles per day (2022 count).

How long is 270th ST over Small Stream?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns 270th ST over Small Stream?

It is owned by the County Highway Agency.