My fence will be in a residential area so I'll fore go the T posts and stick to posts.Two sides of my property is close to underground utilities.They have been informed of my future fencing project.They came out, located, and marked their locations.Because of future planning,they will be abandoning the old water lines in favor of modern composite (plastic I'm sure) piping,I can get within 6 inches of the old stuff with wooden posts.Our water company is constantly having to make repairs in my area due to old collapsed iron pipe.It's one of the first areas plumbed for indoor plumbing.We were living the high life,well,my grand parents were.The phone company is currently abandoning the old bundled single stranded copper lines, and running fiber optic and some other type of upgraded copper wiring.Coax or multi strand copper I'm guessing.They said I could go right against their bundles with wood posts as long as I don't use concrete.
Currently my plan is 6x6 H braced corners,6x6 H braced gate openings,10 foot spaced 4x4 support posts,48 inch field fencing,single strand HT electric wire above and below the fencing to keep critters out.I will have one gated driveway that is 20 foot wide,and 3 walk through lockable gates.