US Bridges

I-35 HWY SB (kta) over Slate Creek

Fair

Sumner County, Kansas · 11.01 MI N US-166 · Structure no. 999903500960123

Built
1956
69 years old, rebuilt 1983
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
212 ft
3 main spans
Daily traffic
9,503
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-35 HWY SB (kta) over Slate Creek is a steel continuous stringer/multi-beam or girder carrying I-35 HWY SB (kta) over Slate Creek in Sumner County, Kansas. It was built in 1956 and reconstructed in 1983, 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 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 9,503 vehicles a day, roughly 31% of them trucks, projected to reach 12,304 by 2044. The structure is 212 ft (64.6 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)
CrossesSlate Creek
Location11.01 MI N US-166
RouteInterstate 35
CountySumner County
StateKansas
Coordinates37.21639, -97.33917
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length212 ft (64.6 m)
Longest span80 ft (24.4 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,503 (2023)
Projected traffic12,304 by 2044
Trucks31%
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 Slate Creek built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1983.

What condition is I-35 HWY SB (kta) over Slate Creek 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 Slate Creek carry?

About 9,503 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is I-35 HWY SB (kta) over Slate Creek?

The structure is 212 ft (64.6 m) long with a longest span of 80 ft (24.4 m) and a deck 34 ft wide.

Who owns I-35 HWY SB (kta) over Slate Creek?

It is owned by the State Toll Authority.