US Bridges

I135 US81 NB over Ko Railway

Good

McPherson County, Kansas · 0.77 MI N US56 NB · Structure no. 999913500590331

Built
1969
56 years old
Condition
Good
inspected January 2025
Type
Slab
Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
7,338
2023 count
Owner
State
State Highway Agency

About this bridge

I135 US81 NB over Ko Railway is a concrete continuous slab carrying I135 US81 NB over Ko Railway in McPherson County, Kansas. It was built in 1969, so it is 56 years old, older 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 7,338 vehicles a day, roughly 21% of them trucks, projected to reach 9,501 by 2044. The structure is 120 ft (36.5 m) long and 42 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesI135 US81 NB
CrossesKo Railway
Location0.77 MI N US56 NB
RouteInterstate 135
StateKansas
Coordinates38.38194, -97.62028
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.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length120 ft (36.5 m)
Longest span45 ft (13.7 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,338 (2023)
Projected traffic9,501 by 2044
Trucks21%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.8 mi (11 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 I135 US81 NB over Ko Railway built?

It was built in 1969, making it 56 years old in 2025.

What condition is I135 US81 NB over Ko Railway 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 January 2025.

How much traffic does I135 US81 NB over Ko Railway carry?

About 7,338 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is I135 US81 NB over Ko Railway?

The structure is 120 ft (36.5 m) long with a longest span of 45 ft (13.7 m) and a deck 42 ft wide.

Who owns I135 US81 NB over Ko Railway?

It is owned by the State Highway Agency.