Mohegan Sun’s 400-room, 242,000 square-foot $139 million Earth Tower, celebrated its grand opening this morning, with a special ribbon cutting event. Mohegan Sun President and General Manager, Ray Pineault and Mohegan Tribal Chairman, Kevin Brown “Red Eagle,” kicked the ceremony off by thanking all of the men and women who worked diligently over the last year and a half to design and construct a truly beautiful addition to Mohegan Sun’s property.