There is a stretch of shoreline below Cohoes where the water runs quick and the willows leaf out weeks before anything else. Spring arrives along the river first and works its way up into the streets. Rivage Landscaping LLC follows it — the first cleanup of the year, winter debris hauled off, the first cut that makes a yard look awake again. From there it is the long stretch of mowing, trimming and edging, week after week, from the island neighborhoods out toward Waterford and Halfmoon. Nothing complicated about it; it simply has to be done well and done on time.