US Bridges

K18 HWY over Antelope Creek

Fair

Ottawa County, Kansas · 4.16 MI E K106 · Structure no. 999901800720161

Built
1963
62 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
1,147
2023 count
Owner
State
State Highway Agency

About this bridge

K18 HWY over Antelope Creek is a concrete continuous slab carrying K18 HWY over Antelope Creek in Ottawa County, Kansas. It was built in 1963, so it is 62 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 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 1,147 vehicles a day, roughly 24% of them trucks, projected to reach 1,400 by 2044. The structure is 102 ft (31.2 m) long and 46 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesK18 HWY
CrossesAntelope Creek
Location4.16 MI E K106
RouteState Highway 18
CountyOttawa County
StateKansas
Coordinates39.01611, -97.64667
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length102 ft (31.2 m)
Longest span40 ft (12.2 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,147 (2023)
Projected traffic1,400 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 K18 HWY over Antelope Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is K18 HWY over Antelope 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 November 2024.

How much traffic does K18 HWY over Antelope Creek carry?

About 1,147 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is K18 HWY over Antelope Creek?

The structure is 102 ft (31.2 m) long with a longest span of 40 ft (12.2 m) and a deck 46 ft wide.

Who owns K18 HWY over Antelope Creek?

It is owned by the State Highway Agency.