SIOUX FALLS, SD - <p>Three additional companies will be official marketing partners of the new Denny Sanford PREMIER Center.<p>Graham Tire will become an official marketing partner in the tire and auto categories.  The sponsorship agreement is for five years and has a package value of more than $50,000.<p>Lewis Drug will also become an exclusive marketing partner.  The sponsorship agreement is for seven years and has a package value of over $120,000.<p>The third exclusive marketing partner will be Wellmark Blue Cross and Blue Shield.  The sponsorship agreement has a package value of more than $140,000 for five years.<p>© 2014 KELOLAND TV. All Rights Reserved.