On a Denmark Township morning the fog fills the St. Croix valley and the bluff-top farms stand above it in clear sun. Elevated Tree Service does its work up there, rope and saddle in a big bur oak, taking limbs off over a roof one at a time because there is nowhere on the ravine side to let anything fall. Removal on ground like this is a matter of rigging and patience; trimming and pruning are about leaving a crown balanced enough to take the next wind up the valley. Storms come along the river corridor and leave hangers stacked in the treetops, and cleanup is not finished until those are out as well. Coming down the ladder to a yard with nothing left in it but rake marks is a fine way to end a day.