US Bridges

120th Ave over Small Creek

Fair

Jones County, Iowa · 083022902 · Structure no. 000000000206401

Built
1980
45 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
16
2022 count
Owner
County
County Highway Agency

About this bridge

120th Ave over Small Creek is a concrete continuous culvert carrying 120th Ave over Small Creek in Jones County, Iowa. It was built in 1980, so it is 45 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 16 vehicles a day, projected to reach 16 by 2044. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries120th Ave
CrossesSmall Creek
Location083022902
RouteCounty Highway 0
CountyJones County
StateIowa
Coordinates41.96261, -91.11281
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length30 ft (9.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16 (2022)
Projected traffic16 by 2044
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 120th Ave over Small Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is 120th Ave over Small 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 January 2024.

How much traffic does 120th Ave over Small Creek carry?

About 16 vehicles per day (2022 count).

How long is 120th Ave over Small Creek?

The structure is 30 ft (9.1 m) long with a longest span of 10 ft (3 m).

Who owns 120th Ave over Small Creek?

It is owned by the County Highway Agency.