US Bridges

I-335 HWY (kta) SB over Neosho River

Good

Lyon County, Kansas · 2.22 MI NE US-50 · Structure no. 999933500560783

Built
1956
69 years old, rebuilt 1986
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
548 ft
5 main spans
Daily traffic
5,825
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-335 HWY (kta) SB over Neosho River is a steel continuous stringer/multi-beam or girder carrying I-335 HWY (kta) SB over Neosho River in Lyon County, Kansas. It was built in 1956 and reconstructed in 1986, so it is 69 years old, older 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 5,825 vehicles a day, roughly 27% of them trucks, projected to reach 8,322 by 2044. The structure is 548 ft (166.9 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-335 HWY (kta) SB
CrossesNeosho River
Location2.22 MI NE US-50
RouteInterstate 335
CountyLyon County
StateKansas
Coordinates38.44167, -96.21472
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.4 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length548 ft (166.9 m)
Longest span120 ft (36.6 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,825 (2023)
Projected traffic8,322 by 2044
Trucks27%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 I-335 HWY (kta) SB over Neosho River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1986.

What condition is I-335 HWY (kta) SB over Neosho River 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 2024.

How much traffic does I-335 HWY (kta) SB over Neosho River carry?

About 5,825 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is I-335 HWY (kta) SB over Neosho River?

The structure is 548 ft (166.9 m) long with a longest span of 120 ft (36.6 m) and a deck 34 ft wide.

Who owns I-335 HWY (kta) SB over Neosho River?

It is owned by the State Toll Authority.