On the coldest mornings the Mohawk steams under the Rexford bridge, and the whole valley from Alplaus down looks like it is exhaling. Orsini Landscaping LLC is usually already out in it, plowing drives while the sky is still the color of slate and the thermometer refuses to move. There is a craftsman's fussiness to the good version of this work: square corners, no windrow left across the garage door, snow stacked where it will not blind the driver backing out. Salt goes down last, thin and even, aimed at the places the sun never quite reaches. Snow clearing for Schenectady and the river towns on both banks.