The conceptual master plan for Project City Center, announced on November 9, 2004, was designed by Ehrenkrantz, Eckstut & Kuhn Architects, laying out the project with approximately 2,400 condominium and condo-hotel units and approximately 4,800 hotel rooms, distributed within several high-rise towers around The Crystals, an ultra high-end retail mall. It is designed to have all commodities for daily life, featuring a 4,000-room hotel and casino (Aria), two 400-room boutique hotels (The Residences at Mandarin Oriental, with 227 residential condo units, and The Harmon Hotel and Spa), a purely residential offering (Veer Towers), a condo-hotel (Vdara Condo-hotel) and a retail and entertainment district which was intended to house the first grocery store directly on the Strip (though as of July 2011, there is no grocery on the property). The multi-use project makes extensive use of green technologies, such as using reclaimed water and an on-site power plant. The Mandarin Oriental, Aria, and Vdara all received LEED certification in November 2009.