US Bridges

Rs 479 - NW 20 ST over Trib. S. Fk. Ninnescah

GoodPosted for load

Pratt County, Kansas · 0.8W 3.0N of Cullison · Structure no. 000000000760105

Built
1985
40 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
25 ft
3 main spans
Daily traffic
35
2021 count
Owner
County
County Highway Agency

About this bridge

Rs 479 - NW 20 ST over Trib. S. Fk. Ninnescah is a concrete culvert carrying Rs 479 - NW 20 ST over Trib. S. Fk. Ninnescah in Pratt County, Kansas. It was built in 1985, so it is 40 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. Its operating status is: posted for load restriction.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2046. The structure is 25 ft (7.7 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRs 479 - NW 20 ST
CrossesTrib. S. Fk. Ninnescah
Location0.8W 3.0N of Cullison
RouteCounty Highway 479
CountyPratt County
StateKansas
Coordinates37.67416, -98.9167
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating31.6 US tons
Inventory rating18.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length25 ft (7.7 m)
Longest span8 ft (2.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic35 (2021)
Projected traffic40 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 479 - NW 20 ST over Trib. S. Fk. Ninnescah built?

It was built in 1985, making it 40 years old in 2025.

What condition is Rs 479 - NW 20 ST over Trib. S. Fk. Ninnescah 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 Rs 479 - NW 20 ST over Trib. S. Fk. Ninnescah carry?

About 35 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Rs 479 - NW 20 ST over Trib. S. Fk. Ninnescah?

The structure is 25 ft (7.7 m) long with a longest span of 8 ft (2.4 m) and a deck 32 ft wide.

Who owns Rs 479 - NW 20 ST over Trib. S. Fk. Ninnescah?

It is owned by the County Highway Agency.