US Bridges

I-35 HWY (kta) SB over Walnut River

Good

Butler County, Kansas · 6.18 MI NE US77 Wl · Structure no. 999903500081433

Built
1979
46 years old, rebuilt 1980
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
197 ft
3 main spans
Daily traffic
9,084
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-35 HWY (kta) SB over Walnut River is a prestressed concrete continuous stringer/multi-beam or girder carrying I-35 HWY (kta) SB over Walnut River in Butler County, Kansas. It was built in 1979 and reconstructed in 1980, so it is 46 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.

It carries about 9,084 vehicles a day, roughly 28% of them trucks, projected to reach 11,762 by 2044. The structure is 197 ft (60 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-35 HWY (kta) SB
CrossesWalnut River
Location6.18 MI NE US77 Wl
RouteInterstate 35
CountyButler County
StateKansas
Coordinates37.9325, -96.76972
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.9 US tons
Inventory rating37.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length197 ft (60 m)
Longest span65 ft (19.8 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,084 (2023)
Projected traffic11,762 by 2044
Trucks28%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn an Interstate toll segment under Secretarial agreement
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-35 HWY (kta) SB over Walnut River built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 1980.

What condition is I-35 HWY (kta) SB over Walnut 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 July 2023.

How much traffic does I-35 HWY (kta) SB over Walnut River carry?

About 9,084 vehicles per day (2023 count), of which roughly 28% are trucks.

How long is I-35 HWY (kta) SB over Walnut River?

The structure is 197 ft (60 m) long with a longest span of 65 ft (19.8 m) and a deck 40 ft wide.

Who owns I-35 HWY (kta) SB over Walnut River?

It is owned by the State Toll Authority.