Installing Gate Post Flush with Tarmac Path

[George.Swiftly]

I want to remove an existing brick pier since the matching one is long gone.

I'd like to install two 200mm x 200mm gate posts (wood) where the brick piers used to be.

Is it possible to install them so they are flush with the existing tarmac path? So remove the old brick and concrete, dig a deep hole and postcrete them in flush with the path?

Please see attached pictures.

 

[jj4091]

Wouldn't it be easier to get the missing pillar rebuilt? Definitely would not use wood posts.