US Bridges

SW 120th over Small Stream

Good

Butler County, Kansas · 4.0E 3.0S of Andover · Structure no. 000080849906240

Built
1954
71 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
20 ft
2 main spans
Daily traffic
175
2023 count
Owner
County
County Highway Agency

About this bridge

SW 120th over Small Stream is a concrete culvert carrying SW 120th over Small Stream in Butler County, Kansas. It was built in 1954, so it is 71 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 175 vehicles a day, roughly 1% of them trucks, projected to reach 175 by 2045. The structure is 20 ft (6.2 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSW 120th
CrossesSmall Stream
Location4.0E 3.0S of Andover
RouteCounty Highway 812
StateKansas
Coordinates37.65049, -97.06392
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30.1 US tons
Inventory rating18 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length20 ft (6.2 m)
Longest span10 ft (3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic175 (2023)
Projected traffic175 by 2045
Trucks1%
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 SW 120th over Small Stream built?

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

What condition is SW 120th over Small Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does SW 120th over Small Stream carry?

About 175 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is SW 120th over Small Stream?

The structure is 20 ft (6.2 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns SW 120th over Small Stream?

It is owned by the County Highway Agency.