Hemlocks until fairly recently were considered a trash tree, like White Fir. They gained value as a pulp tree, as did the White Fir. Both have similar characteristics as far as falling them, care must be taken or they will shatter. You can't treat them like they were Doug Firs, which are pretty tough. Although I had problems with falling DFs for piling, I broke the first three in a row, before they came off the stump, the trees were very tall and skinny, the top third "folded" backwards. What a mess it was.