Steve Ford

I am new to this site and am wondering if someone can help me. I am purchasing a piece of land that has a typical post with three cables, with the cables running down the side of the land. It appears that the lines terminate (with an end post) about 15m inside my property, but whether that is literally the end, or whether they travel on underground, I wouldn't have a clue. I reckon the total length to bury would be about 150m. Can anyone help me whether I can get these wires buried and out of the harms way.