US Bridges

Local Road over Small Stream Overflow

FairPosted for load

Lyon County, Iowa · 099472502 · Structure no. 000000000230460

Built
1970
55 years old, rebuilt 2012
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
20 ft
1 main span
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

Local Road over Small Stream Overflow is a wood or timber stringer/multi-beam or girder carrying Local Road over Small Stream Overflow in Lyon County, Iowa. It was built in 1970 and reconstructed in 2012, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 35 vehicles a day, projected to reach 35 by 2044. The structure is 20 ft (6.1 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLocal Road
CrossesSmall Stream Overflow
Location099472502
RouteCounty Highway 0
CountyLyon County
StateIowa
Coordinates43.37121, -96.34955
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating25.9 US tons
Inventory rating20.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.6 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)
Projected traffic35 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Overflow built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2012.

What condition is Local Road over Small Stream Overflow 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 2024.

How much traffic does Local Road over Small Stream Overflow carry?

About 35 vehicles per day (2022 count).

How long is Local Road over Small Stream Overflow?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns Local Road over Small Stream Overflow?

It is owned by the County Highway Agency.