US Bridges

A50 260th ST over Small Stream

Fair

Lyon County, Iowa · 098483103 · Structure no. 000000000229515

Built
1968
57 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
20 ft
2 main spans
Daily traffic
888
2022 count
Owner
County
County Highway Agency

About this bridge

A50 260th ST over Small Stream is a concrete culvert carrying A50 260th ST over Small Stream in Lyon 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 888 vehicles a day, roughly 12% of them trucks, projected to reach 888 by 2043. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesA50 260th ST
CrossesSmall Stream
Location098483103
RouteCounty Highway 0
CountyLyon County
StateIowa
Coordinates43.27507, -96.56498
Functional classRural Major 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic888 (2022)
Projected traffic888 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 A50 260th ST over Small Stream built?

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

What condition is A50 260th ST over Small Stream 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 July 2023.

How much traffic does A50 260th ST over Small Stream carry?

About 888 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is A50 260th ST over Small Stream?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m).

Who owns A50 260th ST over Small Stream?

It is owned by the County Highway Agency.