US Bridges

K18 HWY over Kansas River Drainage

Good

Riley County, Kansas · 1.12 N of Kansas River · Structure no. 999901800810421

Built
1976
49 years old, rebuilt 2010
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
6,850
2023 count
Owner
State
State Highway Agency

About this bridge

K18 HWY over Kansas River Drainage is a concrete culvert carrying K18 HWY over Kansas River Drainage in Riley County, Kansas. It was built in 1976 and reconstructed in 2010, 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 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 6,850 vehicles a day, roughly 5% of them trucks, projected to reach 10,179 by 2044. The structure is 32 ft (9.7 m) long and 215 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesK18 HWY
CrossesKansas River Drainage
Location1.12 N of Kansas River
RouteState Highway 18
StateKansas
Coordinates39.10444, -96.70222
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length32 ft (9.7 m)
Longest span10 ft (3 m)
Deck width215 ft (65.4 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,850 (2023)
Projected traffic10,179 by 2044
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemYes

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 Kansas River Drainage built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 2010.

What condition is K18 HWY over Kansas River Drainage 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 May 2023.

How much traffic does K18 HWY over Kansas River Drainage carry?

About 6,850 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is K18 HWY over Kansas River Drainage?

The structure is 32 ft (9.7 m) long with a longest span of 10 ft (3 m) and a deck 215 ft wide.

Who owns K18 HWY over Kansas River Drainage?

It is owned by the State Highway Agency.