US Bridges

I35 HWY NB over Frog Creek

Good

Coffey County, Kansas · 11.06 MI E Lyon Coln NB · Structure no. 999903500160101

Built
1973
52 years old
Condition
Good
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
310 ft
5 main spans
Daily traffic
7,350
2023 count
Owner
State
State Highway Agency

About this bridge

I35 HWY NB over Frog Creek is a concrete continuous tee beam carrying I35 HWY NB over Frog Creek in Coffey County, Kansas. It was built in 1973, so it is 52 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 7,350 vehicles a day, roughly 26% of them trucks, projected to reach 8,284 by 2044. The structure is 310 ft (94.5 m) long and 44 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesI35 HWY NB
CrossesFrog Creek
Location11.06 MI E Lyon Coln NB
RouteInterstate 35
StateKansas
Coordinates38.42611, -95.75028
Functional classRural 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length310 ft (94.5 m)
Longest span69 ft (21 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,350 (2023)
Projected traffic8,284 by 2044
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 I35 HWY NB over Frog Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is I35 HWY NB over Frog Creek 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 February 2024.

How much traffic does I35 HWY NB over Frog Creek carry?

About 7,350 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I35 HWY NB over Frog Creek?

The structure is 310 ft (94.5 m) long with a longest span of 69 ft (21 m) and a deck 44 ft wide.

Who owns I35 HWY NB over Frog Creek?

It is owned by the State Highway Agency.