US Bridges

I-35 HWY SB (kta) over Ninnescah River

FairClosed to traffic

Sumner County, Kansas · 7.65 MI N US-160 · Structure no. 999903500960313

Built
1956
69 years old, rebuilt 1985
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
390 ft
4 main spans
Daily traffic
11,227
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-35 HWY SB (kta) over Ninnescah River is a steel continuous stringer/multi-beam or girder carrying I-35 HWY SB (kta) over Ninnescah River in Sumner County, Kansas. It was built in 1956 and reconstructed in 1985, 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: closed to all traffic.

It carries about 11,227 vehicles a day, roughly 28% of them trucks, projected to reach 14,252 by 2044. The structure is 390 ft (118.9 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-35 HWY SB (kta)
CrossesNinnescah River
Location7.65 MI N US-160
RouteInterstate 35
CountySumner County
StateKansas
Coordinates37.38194, -97.32417
Functional classRural Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.2 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length390 ft (118.9 m)
Longest span110 ft (33.5 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,227 (2023)
Projected traffic14,252 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 SB (kta) over Ninnescah River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1985.

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

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

About 11,227 vehicles per day (2023 count), of which roughly 28% are trucks.

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

The structure is 390 ft (118.9 m) long with a longest span of 110 ft (33.5 m) and a deck 34 ft wide.

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

It is owned by the State Toll Authority.