US Bridges

Rs 503 - SE 20 Ave over N. Fork Ninnescah River

Fair

Stafford County, Kansas · 2.0E 11.1S of St. John · Structure no. 000000000930045

Built
1988
37 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
35
2021 count
Owner
County
County Highway Agency

About this bridge

Rs 503 - SE 20 Ave over N. Fork Ninnescah River is a steel stringer/multi-beam or girder carrying Rs 503 - SE 20 Ave over N. Fork Ninnescah River in Stafford County, Kansas. It was built in 1988, so it is 37 years old, younger 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2044. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesRs 503 - SE 20 Ave
CrossesN. Fork Ninnescah River
Location2.0E 11.1S of St. John
RouteCounty Highway 503
CountyStafford County
StateKansas
Coordinates37.83792, -98.71061
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating80.6 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic35 (2021)
Projected traffic40 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 503 - SE 20 Ave over N. Fork Ninnescah River built?

It was built in 1988, making it 37 years old in 2025.

What condition is Rs 503 - SE 20 Ave over N. Fork Ninnescah River 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 503 - SE 20 Ave over N. Fork Ninnescah River carry?

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

How long is Rs 503 - SE 20 Ave over N. Fork Ninnescah River?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns Rs 503 - SE 20 Ave over N. Fork Ninnescah River?

It is owned by the County Highway Agency.