US Bridges

Local Rd. N6H over Walnut Creek

PoorPosted for load

Mitchell County, Kansas · 3.0N 6.6E of Tipton · Structure no. 000620711603860

Built
1935
90 years old, rebuilt 1990
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
61 ft
2 main spans
Daily traffic
20
2002 count
Owner
County
County Highway Agency

About this bridge

Local Rd. N6H over Walnut Creek is a steel stringer/multi-beam or girder carrying Local Rd. N6H over Walnut Creek in Mitchell County, Kansas. It was built in 1935 and reconstructed in 1990, so it is 90 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 20 vehicles a day, projected to reach 20 by 2043. The structure is 61 ft (18.6 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesLocal Rd. N6H
CrossesWalnut Creek
Location3.0N 6.6E of Tipton
RouteCounty Highway 0
CountyMitchell County
StateKansas
Coordinates39.37919, -98.34806
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating50 US tons
Inventory rating29.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2 (+2 approach)
Design loadUnknown
Structure length61 ft (18.6 m)
Longest span17 ft (5.2 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic20 (2002)
Projected traffic20 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$200,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Local Rd. N6H over Walnut Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1990.

What condition is Local Rd. N6H over Walnut Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does Local Rd. N6H over Walnut Creek carry?

About 20 vehicles per day (2002 count).

How long is Local Rd. N6H over Walnut Creek?

The structure is 61 ft (18.6 m) long with a longest span of 17 ft (5.2 m) and a deck 16 ft wide.

Who owns Local Rd. N6H over Walnut Creek?

It is owned by the County Highway Agency.