Farmington Hills, MI-based Ramco-Gershenson Properties Trust (NYSE:RPT), retail REIT with a portfolio of 85 shopping centers totaling 18.9 million square feet in 12 states, announced the completion of a $450 million joint venture with ING Clarion yesterday via the acquisition of Old Orchard Shopping Center, a 95,000-square-foot neighborhood center in West Bloomfield, MI.