US Bridges

CO RD 105 over Small Natural Creek

Fair

Worth County, Iowa · 099220507 · Structure no. 000000000054100

Built
1949
76 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
36 ft
3 main spans
Daily traffic
1,139
2022 count
Owner
County
County Highway Agency

About this bridge

CO RD 105 over Small Natural Creek is a concrete continuous culvert carrying CO RD 105 over Small Natural Creek in Worth County, Iowa. It was built in 1949, so it is 76 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 1,139 vehicles a day, projected to reach 1,139 by 2043. The structure is 36 ft (11 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCO RD 105
CrossesSmall Natural Creek
Location099220507
RouteCounty Highway 0
CountyWorth County
StateIowa
Coordinates43.42293, -93.46462
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.7 US tons
Inventory rating8.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length36 ft (11 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,139 (2022)
Projected traffic1,139 by 2043
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD 105 over Small Natural Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is CO RD 105 over Small Natural Creek 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 November 2023.

How much traffic does CO RD 105 over Small Natural Creek carry?

About 1,139 vehicles per day (2022 count).

How long is CO RD 105 over Small Natural Creek?

The structure is 36 ft (11 m) long with a longest span of 11 ft (3.4 m).

Who owns CO RD 105 over Small Natural Creek?

It is owned by the County Highway Agency.