A funeral service for 94 year old Clarence Vander Sanden of Rock Valley will be held on Thursday at the First Reformed Church in Rock Valley with Rev. Dr. Verlyn Boone officiating. Burial will follow at Valley View Cemetery in Rock Valley. Visitation with the family present will be held Wednesday from 6:30pm to 8:00pm at the church. The Porter Funeral Home has been entrusted with arrangements.