US Bridges

K-120 Highway over Wolf River Drainage

Good

Doniphan County, Kansas · 2.45 MI N K-20 · Structure no. 999912000220471

Built
2001
24 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
50 ft
3 main spans
Daily traffic
382
2023 count
Owner
State
State Highway Agency

About this bridge

K-120 Highway over Wolf River Drainage is a concrete culvert carrying K-120 Highway over Wolf River Drainage in Doniphan County, Kansas. It was built in 2001, so it is 24 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 382 vehicles a day, roughly 9% of them trucks, projected to reach 390 by 2044. The structure is 50 ft (15.1 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesK-120 Highway
CrossesWolf River Drainage
Location2.45 MI N K-20
RouteState Highway 120
CountyDoniphan County
StateKansas
Coordinates39.76917, -95.25278
Functional classRural Major Collector

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 inspectionJune 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating89.3 US tons
Inventory rating54 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length50 ft (15.1 m)
Longest span16 ft (4.9 m)
Deck width51 ft (15.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic382 (2023)
Projected traffic390 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 K-120 Highway over Wolf River Drainage built?

It was built in 2001, making it 24 years old in 2025.

What condition is K-120 Highway over Wolf 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 June 2023.

How much traffic does K-120 Highway over Wolf River Drainage carry?

About 382 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is K-120 Highway over Wolf River Drainage?

The structure is 50 ft (15.1 m) long with a longest span of 16 ft (4.9 m) and a deck 51 ft wide.

Who owns K-120 Highway over Wolf River Drainage?

It is owned by the State Highway Agency.