The number of frozen water pipes increased during the recent cold snap and more may come to light as temperatures warm, according to Curtis Horton of Carson City’s Public Works Department.Horton, departmental operations chief, said Tuesday that calls about frozen pipes at homes and mobile homes had come in at a higher-than-normal rate, above the typical 20 to 30 calls a week during cold weather. He urged mobile home owners to check their skirting and other homeowners to check crawl spaces and boxes that cover water connections outside their houses. A sprinkler water pipe rupture Tuesday evening forced the evacuation …