Yes, you can maintain both types of IRAs at the same time. You can even make contributions to both types of IRAs in the same year. But your contributions to both Roth and traditional IRAs cannot exceed the maximum contribution limit for all IRAs.
NCUA - Your savings federally insured to at least $250,000 and backed by the full faith and credit of the United States Government. National Credit Union Administration, a U.S. Government agency. Equal Housing Lender - We do business in accordance with the Fair Housing Law and Equal Opportunity Credit Act