US Bridges

SW 100th over Unnamed Watercourse

Fair

Butler County, Kansas · 3.8W of Leon · Structure no. 000080873206200

Built
1937
88 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
24 ft
2 main spans
Daily traffic
500
2023 count
Owner
County
County Highway Agency

About this bridge

SW 100th over Unnamed Watercourse is a concrete slab carrying SW 100th over Unnamed Watercourse in Butler County, Kansas. It was built in 1937, so it is 88 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 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 500 by 2045. The structure is 24 ft (7.3 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSW 100th
CrossesUnnamed Watercourse
Location3.8W of Leon
RouteCounty Highway 818
CountyButler County
StateKansas
Coordinates37.67946, -96.85819
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span13 ft (3.9 m)
Deck width29 ft (8.8 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic500 (2023)
Projected traffic500 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 SW 100th over Unnamed Watercourse built?

It was built in 1937, making it 88 years old in 2025.

What condition is SW 100th over Unnamed Watercourse 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 July 2024.

How much traffic does SW 100th over Unnamed Watercourse carry?

About 500 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is SW 100th over Unnamed Watercourse?

The structure is 24 ft (7.3 m) long with a longest span of 13 ft (3.9 m) and a deck 29 ft wide.

Who owns SW 100th over Unnamed Watercourse?

It is owned by the County Highway Agency.