US Bridges

L14 over Small Stream

Fair

Sioux County, Iowa · 094432902 · Structure no. 000000000308285

Built
1954
71 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
22 ft
3 main spans
Daily traffic
722
2021 count
Owner
County
County Highway Agency

About this bridge

L14 over Small Stream is a concrete culvert carrying L14 over Small Stream in Sioux County, Iowa. It was built in 1954, so it is 71 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 5 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 722 vehicles a day, roughly 18% of them trucks, projected to reach 722 by 2043. The structure is 22 ft (6.7 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesL14
CrossesSmall Stream
Location094432902
RouteCounty Highway 0
CountySioux County
StateIowa
Coordinates42.93056, -95.95759
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 protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span8 ft (2.4 m)
Deck width31 ft (9.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic722 (2021)
Projected traffic722 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was L14 over Small Stream built?

It was built in 1954, making it 71 years old in 2025.

What condition is L14 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 April 2023.

How much traffic does L14 over Small Stream carry?

About 722 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is L14 over Small Stream?

The structure is 22 ft (6.7 m) long with a longest span of 8 ft (2.4 m) and a deck 31 ft wide.

Who owns L14 over Small Stream?

It is owned by the County Highway Agency.