Large-scale urban development will soon replace the San Bernardino County Dairy Preserve. Last December, the city of Ontario completed its annexation of more than half of the 15,000-acre swath of farmland, and the City of Chino either has annexed or plans to annex the remainder. Ontario's plans for what the city has tabbed the "New Model Colony" call for development of 31,000 homes, 5 million square feet of retail space and 5 million square feet of industrial space.