US Bridges

I635 HWY NB over Merriam Drive

Good

Johnson County, Kansas · JCT Merriam DR/I635 · Structure no. 999963500460731

Built
1955
70 years old, rebuilt 1986
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
190 ft
3 main spans
Daily traffic
34,934
2023 count
Owner
State
State Highway Agency

About this bridge

I635 HWY NB over Merriam Drive is a steel continuous stringer/multi-beam or girder carrying I635 HWY NB over Merriam Drive in Johnson County, Kansas. It was built in 1955 and reconstructed in 1986, so it is 70 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 34,934 vehicles a day, roughly 9% of them trucks, projected to reach 37,091 by 2044. The structure is 190 ft (57.8 m) long and 63 ft wide.

CarriesI635 HWY NB
CrossesMerriam Drive
LocationJCT Merriam DR/I635
RouteInterstate 635
StateKansas
Coordinates39.0425, -94.67417
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 inspectionJuly 2024
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 alignment7: Better than present minimum criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length190 ft (57.8 m)
Longest span74 ft (22.6 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,934 (2023)
Projected traffic37,091 by 2044
Trucks9%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 I635 HWY NB over Merriam Drive built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1986.

What condition is I635 HWY NB over Merriam Drive 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 July 2024.

How much traffic does I635 HWY NB over Merriam Drive carry?

About 34,934 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I635 HWY NB over Merriam Drive?

The structure is 190 ft (57.8 m) long with a longest span of 74 ft (22.6 m) and a deck 63 ft wide.

Who owns I635 HWY NB over Merriam Drive?

It is owned by the State Highway Agency.