The phrase "mounted at" is correct and can be used in written English.
You can use it to refer to the location or surface something is affixed to. For example: "The painting was mounted at eye level on the wall."
Similar efforts have been mounted at about 40 other universities.
Picket lines will be mounted at stations including Paddington.
Some successful defences have, however, been mounted at the barricades.
A 6-speed automatic is mounted at the rear axle.
They watch each plane on the ground from video cameras mounted at the gates.
They should be mounted at the same height as the electrical outlets.
A number of shows have been mounted at the museum for the anniversary.
Israeli security forces mounted at least three military operations against Palestinian targets in Gaza today.
They're mounted at opposite ends of a sort of rotating fuselage.
If that front page isn't signed, framed and mounted at Post HQ, shame on them.
Its equity business was way down, and losses mounted at UBS Capital, the private equity unit.
