Mysterious log structure

I had passed this log structure many times over a dozen years withought seeing it. It was just twenty or thirty feet away from the road along North Barriere Lake, British Columbia, Canada. The doorway seems to have been purposely built wide at the top and narrow at the bottom. The doorway is less than five feet tall and the entranceway is a couple feet deep. Inside there is a chamber perpendicular to the entranceway. It is less than three feet wide and less than five feet tall. Someone suggested to me that it may have been used to keep tree seedlings cold until they could be planted. Today, with fast vehicles and better roads seedlings are brought to tree planters in refrigerated trucks and there is probably little need to store them for long periods. It is also possible that this was part of a depression era work camp from the 1930's although I have no information about a work camp in that area. The only objects left at the site were a cast iron stove lid and a box-like metal object that could have been part of a stove.