Perhaps you should ask the Utility companies directly?
Also the City of Calgary has bylaws as to what you can and can not do with your yard.
Caroline

I am not in Calgary but hubby works for a utility company and if they need to get in on a right of way and there is stuff in the way they move it. Trees fences and what have you they do not replace what they move.

I suppose it depends on what you are willing to risk.

This post was edited by CLBlakey on Wed, May 22, 13 at 8:16

You can't put in any permanent structures (e.g. deck, patio, garage) unless you get a relaxation. You're not doing any of those things so at worst if the utility needs to get in there they'll rip out your stuff. They do not put it back in. They will put down sod at most.

Thank you for your great info, Caroline, CLBlakey and shazam. I spoke with my landscaper and we will have to modify the plan. I think that I will do some "non-permanent" landscaping there but will avoid putting trees there at all. Hopefully that will work... thanks again!