US Bridges

I-135 Highway NB over 21st Street

Good

Sedgwick County, Kansas · .09 MI N 21st Street · Structure no. 999913500874681

Built
2002
23 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
183 ft
3 main spans
Daily traffic
36,128
2023 count
Owner
State
State Highway Agency

About this bridge

I-135 Highway NB over 21st Street is a concrete continuous slab carrying I-135 Highway NB over 21st Street in Sedgwick County, Kansas. It was built in 2002, so it is 23 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 36,128 vehicles a day, roughly 6% of them trucks, projected to reach 44,083 by 2044. The structure is 183 ft (55.8 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-135 Highway NB
Crosses21st Street
Location.09 MI N 21st Street
RouteInterstate 135
StateKansas
Coordinates37.7225, -97.31778
Functional classUrban 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.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108 US tons
Inventory rating60 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length183 ft (55.8 m)
Longest span72 ft (22 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,128 (2023)
Projected traffic44,083 by 2044
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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-135 Highway NB over 21st Street built?

It was built in 2002, making it 23 years old in 2025.

What condition is I-135 Highway NB over 21st Street 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 September 2024.

How much traffic does I-135 Highway NB over 21st Street carry?

About 36,128 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-135 Highway NB over 21st Street?

The structure is 183 ft (55.8 m) long with a longest span of 72 ft (22 m) and a deck 59 ft wide.

Who owns I-135 Highway NB over 21st Street?

It is owned by the State Highway Agency.