US Bridges

W. 120th Ave. N. over South Branch Slate Creek

FairPosted for load

Sumner County, Kansas · 3.0N 2.1W Conway Springs · Structure no. 000000000961140

Built
1940
85 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
100
2013 count
Owner
County
County Highway Agency

About this bridge

W. 120th Ave. N. over South Branch Slate Creek is a concrete culvert carrying W. 120th Ave. N. over South Branch Slate Creek in Sumner County, Kansas. It was built in 1940, so it is 85 years old, older than the Kansas average of 52.8 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 2% of them trucks, projected to reach 135 by 2043. The structure is 26 ft (7.8 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesW. 120th Ave. N.
CrossesSouth Branch Slate Creek
Location3.0N 2.1W Conway Springs
RouteCounty Highway 2227
CountySumner County
StateKansas
Coordinates37.43075, -97.68039
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length26 ft (7.8 m)
Longest span8 ft (2.4 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic100 (2013)
Projected traffic135 by 2043
Trucks2%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was W. 120th Ave. N. over South Branch Slate Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is W. 120th Ave. N. over South Branch Slate 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 May 2023.

How much traffic does W. 120th Ave. N. over South Branch Slate Creek carry?

About 100 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is W. 120th Ave. N. over South Branch Slate Creek?

The structure is 26 ft (7.8 m) long with a longest span of 8 ft (2.4 m) and a deck 34 ft wide.

Who owns W. 120th Ave. N. over South Branch Slate Creek?

It is owned by the County Highway Agency.