US Bridges

SW 120th over Four Mile Creek

Good

Butler County, Kansas · 2.8E 3.0S of Andover · Structure no. 000080847706240

Built
2019
6 years old
Condition
Good
inspected January 2025
Type
Slab
Concrete Continuous
Length
153 ft
3 main spans
Daily traffic
175
2023 count
Owner
County
County Highway Agency

About this bridge

SW 120th over Four Mile Creek is a concrete continuous slab carrying SW 120th over Four Mile Creek in Butler County, Kansas. It was built in 2019, so it is 6 years old, younger 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 8 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, projected to reach 200 by 2045. The structure is 153 ft (46.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSW 120th
CrossesFour Mile Creek
Location2.8E 3.0S of Andover
RouteCounty Highway 812
StateKansas
Coordinates37.65056, -97.08422
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating99.8 US tons
Inventory rating62.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length153 ft (46.5 m)
Longest span60 ft (18.2 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 traffic200 by 2045
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 SW 120th over Four Mile Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is SW 120th over Four Mile Creek 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 Four Mile Creek carry?

About 175 vehicles per day (2023 count).

How long is SW 120th over Four Mile Creek?

The structure is 153 ft (46.5 m) long with a longest span of 60 ft (18.2 m) and a deck 32 ft wide.

Who owns SW 120th over Four Mile Creek?

It is owned by the County Highway Agency.