I think it was last spring that the Looney for a short while hit 1.20 US but the pull back was orchestrated not so much over lumber ( that was much earlier and also dealt with stumpage fees) but over automotive production losses in my province Ontario. My current premier asked that the government do something about lowering the Looney so that parts production would not go south of the border. A relative of mine got laid off due to that very scenario because the american company that he was working for moved production to southern states.
Also there is pressure to keep the Looney down so that the US would get cheap oil from Alberta. That is what was meant when US president in State of Union address that he will lower dependence on foreign oil. Canada is not foreign when it comes to resources.