US Bridges

K18 HWY over Twelvemile Creek

Good

Lincoln County, Kansas · 8.21 MI E K14 · Structure no. 999901800530251

Built
1959
66 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
28 ft
1 main span
Daily traffic
1,021
2023 count
Owner
State
State Highway Agency

About this bridge

K18 HWY over Twelvemile Creek is a concrete culvert carrying K18 HWY over Twelvemile Creek in Lincoln County, Kansas. It was built in 1959, so it is 66 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,021 vehicles a day, roughly 23% of them trucks, projected to reach 1,042 by 2044. The structure is 28 ft (8.5 m) long and 56 ft wide.

CarriesK18 HWY
CrossesTwelvemile Creek
Location8.21 MI E K14
RouteState Highway 18
StateKansas
Coordinates39.03083, -98.01389
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width56 ft (17.2 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,021 (2023)
Projected traffic1,042 by 2044
Trucks23%
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 K18 HWY over Twelvemile Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is K18 HWY over Twelvemile Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does K18 HWY over Twelvemile Creek carry?

About 1,021 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is K18 HWY over Twelvemile Creek?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 56 ft wide.

Who owns K18 HWY over Twelvemile Creek?

It is owned by the State Highway Agency.