As RockyNY says..pull them down with the FEL. We had a huge snow here where my neighbour asked me to clear large piles with my pull-type blower. He has a front plow truck but ran out of space. Where there was room, I could push the tops of the piles with the raised FEL, working in manageable chunks until I got it to a depth where I could do the rest with the blower.
Where there was not room to push over an edge you can use the method RockyNY suggests. I use that method for removing 6-7' snow piles that fall off a shed metal roof and I can't get with the blower. Rather than back up with the tractor, place the bucket so its bottom is a little less than vertical in the pile, put the loader in float and curl as if dumping a bucket so it moves the snow toward you. It is more manageable near a building and by having the loader in float you don't run the risk of damaging the dump cylinders.
If you do get a blower you will find you will not end up with those huge piles since the snow is cast far off the road.