US Bridges

Local Road over Small Stream

Good

Lyon County, Iowa · 100450902 · Structure no. 000000000231031

Built
1989
36 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

Local Road over Small Stream is a concrete culvert carrying Local Road over Small Stream in Lyon County, Iowa. It was built in 1989, so it is 36 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 26 vehicles a day, projected to reach 26 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLocal Road
CrossesSmall Stream
Location100450902
RouteCounty Highway 0
CountyLyon County
StateIowa
Coordinates43.497, -96.17588
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Local Road over Small Stream built?

It was built in 1989, making it 36 years old in 2025.

What condition is Local Road 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 July 2023.

How much traffic does Local Road over Small Stream carry?

About 26 vehicles per day (2022 count).

How long is Local Road over Small Stream?

The structure is 21 ft (6.4 m) long with a longest span of 7 ft (2.1 m).

Who owns Local Road over Small Stream?

It is owned by the County Highway Agency.