US Bridges

K99 HWY over Rock Creek Drainage

Fair

Pottawatomie County, Kansas · 3.27 MI N State(westmorl) · Structure no. 999909900750391

Built
1933
92 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
877
2023 count
Owner
State
State Highway Agency

About this bridge

K99 HWY over Rock Creek Drainage is a concrete culvert carrying K99 HWY over Rock Creek Drainage in Pottawatomie County, Kansas. It was built in 1933, so it is 92 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 877 vehicles a day, roughly 20% of them trucks, projected to reach 913 by 2044. The structure is 24 ft (7.3 m) long and 55 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

Location

Open in Google Maps
CarriesK99 HWY
CrossesRock Creek Drainage
Location3.27 MI N State(westmorl)
RouteState Highway 99
CountyPottawatomie County
StateKansas
Coordinates39.43944, -96.40722
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating42.1 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width55 ft (16.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic877 (2023)
Projected traffic913 by 2044
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 km)
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 K99 HWY over Rock Creek Drainage built?

It was built in 1933, making it 92 years old in 2025.

What condition is K99 HWY over 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 May 2023.

How much traffic does K99 HWY over Rock Creek Drainage carry?

About 877 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is K99 HWY over Rock Creek Drainage?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 55 ft wide.

Who owns K99 HWY over Rock Creek Drainage?

It is owned by the State Highway Agency.