US Bridges

Thirty First ST over I-35 HWY (kta)

Fair

Sedgwick County, Kansas · 0.66 MI NE K-15 · Structure no. 999903500872443

Built
1956
69 years old, rebuilt 1994
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
178 ft
4 main spans
Daily traffic
8,339
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Thirty First ST over I-35 HWY (kta) is a steel continuous stringer/multi-beam or girder carrying Thirty First ST over I-35 HWY (kta) in Sedgwick County, Kansas. It was built in 1956 and reconstructed in 1994, 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.

It carries about 8,339 vehicles a day, projected to reach 9,976 by 2044. The structure is 178 ft (54.4 m) long and 61 ft wide.

Location

Open in Google Maps
CarriesThirty First ST
CrossesI-35 HWY (kta)
Location0.66 MI NE K-15
RouteCity Street 6100
CountySedgwick County
StateKansas
Coordinates37.635, -97.28611
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckNot applicable
Main spans4
Design loadHS 20
Structure length178 ft (54.4 m)
Longest span51 ft (15.5 m)
Deck width61 ft (18.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,339 (2023)
Projected traffic9,976 by 2044
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 Thirty First ST over I-35 HWY (kta) built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1994.

What condition is Thirty First ST over I-35 HWY (kta) 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 Thirty First ST over I-35 HWY (kta) carry?

About 8,339 vehicles per day (2023 count).

How long is Thirty First ST over I-35 HWY (kta)?

The structure is 178 ft (54.4 m) long with a longest span of 51 ft (15.5 m) and a deck 61 ft wide.

Who owns Thirty First ST over I-35 HWY (kta)?

It is owned by the State Toll Authority.