US Bridges

Rs 486 - Lake RD over Trib. S. Fk. Ninnescah

Fair

Pratt County, Kansas · 2.6E 1.0S of Pratt · Structure no. 000000000760130

Built
1970
55 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
36 ft
3 main spans
Daily traffic
1,005
2021 count
Owner
County
County Highway Agency

About this bridge

Rs 486 - Lake RD over Trib. S. Fk. Ninnescah is a concrete culvert carrying Rs 486 - Lake RD over Trib. S. Fk. Ninnescah in Pratt County, Kansas. It was built in 1970, so it is 55 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 6 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 1,005 vehicles a day, roughly 10% of them trucks, projected to reach 1,205 by 2046. The structure is 36 ft (11 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRs 486 - Lake RD
CrossesTrib. S. Fk. Ninnescah
Location2.6E 1.0S of Pratt
RouteCounty Highway 486
CountyPratt County
StateKansas
Coordinates37.63101, -98.69113
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length36 ft (11 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic1,005 (2021)
Projected traffic1,205 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Rs 486 - Lake RD over Trib. S. Fk. Ninnescah built?

It was built in 1970, making it 55 years old in 2025.

What condition is Rs 486 - Lake RD over Trib. S. Fk. Ninnescah 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 Rs 486 - Lake RD over Trib. S. Fk. Ninnescah carry?

About 1,005 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Rs 486 - Lake RD over Trib. S. Fk. Ninnescah?

The structure is 36 ft (11 m) long with a longest span of 11 ft (3.5 m).

Who owns Rs 486 - Lake RD over Trib. S. Fk. Ninnescah?

It is owned by the County Highway Agency.