Thanks man It used to be bigger we took out 30' section where my cart is parked and put in a paver area around the Rolex clock.
When I saw the pics, I was going to say western red cedar as it looks so much like that. Western red cedar isn't that compact though and reaches giant heights. It is what I have been stripping bark from to try and make baskets.
Your hemlocks are subject to getting infested by the Wooly Adelgid. If they don't have it they soon will. They never were meant to be a hedge to begin with so you might as well replace them now. Otherwise you will be dumping pesticides on them constantly to fight a losing battle. http://na.fs.fed.us/spfo/pubs/pest_al/hemlock/hwa05.htm