US Bridges

260th ST over Drainage Ditch 13

FairPosted for load

Story County, Iowa · 083233003 · Structure no. 000000000314800

Built
1968
57 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

260th ST over Drainage Ditch 13 is a steel stringer/multi-beam or girder carrying 260th ST over Drainage Ditch 13 in Story County, Iowa. It was built in 1968, so it is 57 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 22% of them trucks, projected to reach 50 by 2043. The structure is 32 ft (9.8 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
Carries260th ST
CrossesDrainage Ditch 13
Location083233003
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates41.97946, -93.56535
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.6 US tons
Inventory rating21.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2043
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 260th ST over Drainage Ditch 13 built?

It was built in 1968, making it 57 years old in 2025.

What condition is 260th ST over Drainage Ditch 13 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2022.

How much traffic does 260th ST over Drainage Ditch 13 carry?

About 50 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is 260th ST over Drainage Ditch 13?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 27 ft wide.

Who owns 260th ST over Drainage Ditch 13?

It is owned by the County Highway Agency.