US Bridges

SW 100th over Unnamed Watercourse

Fair

Butler County, Kansas · 1.8E of Augusta · Structure no. 000080863806200

Built
1937
88 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
22 ft
3 main spans
Daily traffic
600
2023 count
Owner
County
County Highway Agency

About this bridge

SW 100th over Unnamed Watercourse is a concrete culvert 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 600 vehicles a day, roughly 1% of them trucks, projected to reach 600 by 2045. The structure is 22 ft (6.7 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSW 100th
CrossesUnnamed Watercourse
Location1.8E of Augusta
RouteCounty Highway 818
CountyButler County
StateKansas
Coordinates37.6793, -96.93767
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 rating26 US tons
Inventory rating15.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span7 ft (2.1 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic600 (2023)
Projected traffic600 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 February 2025.

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

About 600 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is SW 100th over Unnamed Watercourse?

The structure is 22 ft (6.7 m) long with a longest span of 7 ft (2.1 m) and a deck 30 ft wide.

Who owns SW 100th over Unnamed Watercourse?

It is owned by the County Highway Agency.