Don’t look now, but the Tucson Roadrunners open the hockey season Sept. 28 in Minnesota, and will open their third season at the Tucson Arena on Oct. 6. Alex Kinkopf, the Roadrunners’ staff writer and director of digital operations, last week wrote a terrific piece about how the sheet of ice at Tucson Arena is put into place. It requires 10,600 gallons of water and a cement floor that can withstand constant temperatures of 14 degrees. After the ice is in place, it is fused with 400 gallons of white paint. “Once that 1¼-inch base is met,” wrote Kinkopf, “the floor’s temperature ups to 18 degrees, where it will remain throughout the season.” The ice was laid last week.