US Bridges

260th ST over Trib. to Troublesome

Good

Guthrie County, Iowa · 079332901 · Structure no. 000000000168661

Built
2012
13 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

260th ST over Trib. to Troublesome is a steel stringer/multi-beam or girder carrying 260th ST over Trib. to Troublesome in Guthrie County, Iowa. It was built in 2012, so it is 13 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 11 vehicles a day, projected to reach 11 by 2042. The structure is 35 ft (10.7 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries260th ST
CrossesTrib. to Troublesome
Location079332901
RouteCounty Highway 0
CountyGuthrie County
StateIowa
Coordinates41.63118, -94.71778
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.5 US tons
Inventory rating33.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span33 ft (10.1 m)
Deck width24 ft (7.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic11 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 260th ST over Trib. to Troublesome built?

It was built in 2012, making it 13 years old in 2025.

What condition is 260th ST over Trib. to Troublesome 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 November 2022.

How much traffic does 260th ST over Trib. to Troublesome carry?

About 11 vehicles per day (2022 count).

How long is 260th ST over Trib. to Troublesome?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 24 ft wide.

Who owns 260th ST over Trib. to Troublesome?

It is owned by the County Highway Agency.