Arlington-based Interstate Hotels & Resorts, the nation's largest independent hotel management company, has acquired the 329-room Hilton Concord in Concord. The property was purchased from Newport Beach, CA-based Hanford Hotels Inc. for $29.15 million, or about $88,602 a room. Interstate Hotels & Resorts will manage the hotel. Located on 7.4 acres at 1970 Diamond Blvd. off of I-680 and Willow Pass Road, the 11-story Hilton Concord hotel offers a conference center with more than 15,600 square feet of meeting, banquet, and pre-function space, including the largest hotel ballroom in the local market. The hotel has three executive level concierge floors and offers high-speed Internet access.