On her seventh anniversary as president of the Chatham Economic Development Corp., Dianne Reid was having an economic developer’s dream week.

On Monday night, plans for the massive 7,120-acre Chatham Park received approval from the Pittsboro town board – a major initial hurdle cleared. And then Wednesday evening — seven years to the day since she started work at the EDC – Reid received word from the state that 1,818-acre Chatham-Randolph megasite had received official N.C. site certification.…