US Bridges

Lark Avenue over Small Stream

Fair

Union County, Iowa · 071301202 · Structure no. 000000000324841

Built
2002
23 years old
Condition
Fair
inspected October 2022
Type
Slab
Wood or Timber
Length
24 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

Lark Avenue over Small Stream is a wood or timber slab carrying Lark Avenue over Small Stream in Union County, Iowa. It was built in 2002, so it is 23 years old, younger 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2043. The structure is 24 ft (7.3 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesLark Avenue
CrossesSmall Stream
Location071301202
RouteCounty Highway 0
CountyUnion County
StateIowa
Coordinates40.95997, -94.26116
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.9 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2043
Trucks10%
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 Lark Avenue over Small Stream built?

It was built in 2002, making it 23 years old in 2025.

What condition is Lark Avenue 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 October 2022.

How much traffic does Lark Avenue over Small Stream carry?

About 30 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Lark Avenue over Small Stream?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 25 ft wide.

Who owns Lark Avenue over Small Stream?

It is owned by the County Highway Agency.