US Bridges

K99 HWY over Dow Creek

Fair

Lyon County, Kansas · 3.05 MI N I35 · Structure no. 999909900561361

Built
1985
40 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
163 ft
3 main spans
Daily traffic
1,436
2023 count
Owner
State
State Highway Agency

About this bridge

K99 HWY over Dow Creek is a concrete continuous slab carrying K99 HWY over Dow Creek in Lyon County, Kansas. It was built in 1985, so it is 40 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 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 1,436 vehicles a day, roughly 13% of them trucks, projected to reach 1,823 by 2044. The structure is 163 ft (49.6 m) long and 42 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesK99 HWY
CrossesDow Creek
Location3.05 MI N I35
RouteState Highway 99
CountyLyon County
StateKansas
Coordinates38.46194, -96.17083
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.1 US tons
Inventory rating46 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length163 ft (49.6 m)
Longest span64 ft (19.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,436 (2023)
Projected traffic1,823 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Dow Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is K99 HWY over Dow 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 June 2024.

How much traffic does K99 HWY over Dow Creek carry?

About 1,436 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is K99 HWY over Dow Creek?

The structure is 163 ft (49.6 m) long with a longest span of 64 ft (19.5 m) and a deck 42 ft wide.

Who owns K99 HWY over Dow Creek?

It is owned by the State Highway Agency.