Same helicopter was over our place in Okanogan last summer. We are on the east side of the valley, it flew over us all the way across the valley into the Cascades and then 45 minutes later would fly back and do the same flight again just a few hundred feet south each time. It did not stop just kept doing it, did it for a couple days then it clouded up until we left. We heard at the time it was surveying for water and minerals and

Lots of folks up there were not impressed.