US Bridges

280th ST over Small Stream

Good

Buchanan County, Iowa · 087090201 · Structure no. 000000000081321

Built
2020
5 years old
Condition
Good
inspected December 2022
Type
Box Beam or Girders - Multiple
Concrete
Length
53 ft
1 main span
Daily traffic
20
2021 count
Owner
County
County Highway Agency

About this bridge

280th ST over Small Stream is a concrete box beam or girders - multiple carrying 280th ST over Small Stream in Buchanan County, Iowa. It was built in 2020, so it is 5 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 20 vehicles a day, projected to reach 20 by 2042. The structure is 53 ft (16.2 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries280th ST
CrossesSmall Stream
Location087090201
RouteCounty Highway 0
CountyBuchanan County
StateIowa
Coordinates42.38577, -91.85983
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating57.1 US tons
Inventory rating44 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length53 ft (16.2 m)
Longest span50 ft (15.2 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2021)
Projected traffic20 by 2042
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 280th ST over Small Stream built?

It was built in 2020, making it 5 years old in 2025.

What condition is 280th 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 December 2022.

How much traffic does 280th ST over Small Stream carry?

About 20 vehicles per day (2021 count).

How long is 280th ST over Small Stream?

The structure is 53 ft (16.2 m) long with a longest span of 50 ft (15.2 m) and a deck 32 ft wide.

Who owns 280th ST over Small Stream?

It is owned by the County Highway Agency.