US Bridges

K39 HWY over Flat Rock Creek Drainage

Fair

Bourbon County, Kansas · 0.56 MI E Neosho Co. Line · Structure no. 999903900060491

Built
1976
49 years old
Condition
Fair
inspected February 2023
Type
Culvert
Steel
Length
38 ft
4 main spans
Daily traffic
1,016
2023 count
Owner
State
State Highway Agency

About this bridge

K39 HWY over Flat Rock Creek Drainage is a steel culvert carrying K39 HWY over Flat Rock Creek Drainage in Bourbon County, Kansas. It was built in 1976, so it is 49 years old, younger 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.

It carries about 1,016 vehicles a day, roughly 11% of them trucks, projected to reach 1,290 by 2044. The structure is 38 ft (11.6 m) long and 56 ft wide.

Location

Open in Google Maps
CarriesK39 HWY
CrossesFlat Rock Creek Drainage
Location0.56 MI E Neosho Co. Line
RouteState Highway 39
CountyBourbon County
StateKansas
Coordinates37.71806, -95.07583
Functional classRural Minor Arterial

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 inspectionFebruary 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating39 US tons
Inventory rating31 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckCorrugated steel
Main spans4
Design loadH 20
Structure length38 ft (11.6 m)
Longest span6 ft (1.8 m)
Deck width56 ft (17.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,016 (2023)
Projected traffic1,290 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 K39 HWY over Flat Rock Creek Drainage built?

It was built in 1976, making it 49 years old in 2025.

What condition is K39 HWY over Flat Rock Creek Drainage 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 2023.

How much traffic does K39 HWY over Flat Rock Creek Drainage carry?

About 1,016 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is K39 HWY over Flat Rock Creek Drainage?

The structure is 38 ft (11.6 m) long with a longest span of 6 ft (1.8 m) and a deck 56 ft wide.

Who owns K39 HWY over Flat Rock Creek Drainage?

It is owned by the State Highway Agency.