US Bridges

280th ST over Marshall-Story DD#2

Good

Story County, Iowa · 0.3 MI W 730th Ave · Structure no. 000000000313451

Built
2018
7 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

280th ST over Marshall-Story DD#2 is a concrete culvert carrying 280th ST over Marshall-Story DD#2 in Story 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 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 2043. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries280th ST
CrossesMarshall-Story DD#2
Location0.3 MI W 730th Ave
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates41.94996, -93.25777
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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating50.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Marshall-Story DD#2 built?

It was built in 2018, making it 7 years old in 2025.

What condition is 280th ST over Marshall-Story DD#2 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 February 2023.

How much traffic does 280th ST over Marshall-Story DD#2 carry?

About 20 vehicles per day (2022 count).

How long is 280th ST over Marshall-Story DD#2?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns 280th ST over Marshall-Story DD#2?

It is owned by the County Highway Agency.