Knoxville Hospital & Clinics announced that its Red Rock Healthcare Clinic in Pella will resume its normal business hours beginning June 1. Patients can call (641) 628-2222 to schedule an appointment at the clinic, located at 615 Washington. Red Rock Healthcare is open Monday through Friday from 7 a.m. – 5 p.m. The office is closed daily from noon to 1 p.m.