When a squall crosses Lake Champlain and hits the Battery Street hill, Burlington gets serious about traction in a hurry. SnoWorks Property Management works those hours — plowing lots and drives, clearing sidewalks and entryways, snow blowing what a plow cannot reach, and laying salt and sand where the grade turns slick. The rest of the year the same grounds get mowed, trimmed, edged and mulched, with the beds opened in spring and cleared again in fall. Looking after a property here means the calendar runs at two speeds and both of them matter. The aim is to go unnoticed: open lots, clear entryways, and in July, even grass.