The U.S. National Whitewater Center is draining water from its whitewater channels as part of an intensive cleaning process, according to Mecklenburg County's health department. The timetable for that cleaning to be complete is unknown, says Dr. Marcus Plescia, director of the Mecklenburg County Health Department. "We think that's a very good first step," he says. The whitewater center did not respond to requests for comment on Monday. The outdoor recreation center announced Friday it...