Green Street looks its finest just before it wakes — streetlights still burning, storefronts dark, three fresh inches lying untouched across the sidewalk. Rodriguez Landscape inc. is out in that blue hour with a blade and a spreader, opening lots and cutting the walks so doors can unlock on time. Snow in a river town arrives wet and heavy one week and dry and blowing the next, and the plow has to be set for whichever showed up. Salt goes down along the shaded stretches where ice stays honest all day long. By the time McHenry is up and moving, the morning looks like nothing needed doing at all.