The Abandoibarra Master Plan was drawn by Balmori Associates, Cesar Pelli and Eugenio Aguinaga in 1998 (winner of an international competition). Balmori Associates created park guidelines and designed all open space, streets, sidewalks and plazas, placing emphasis on expanding the amount of green space in the city and incorporating sustainable design practices. Two-thirds of the Master Plan area are dedicated to parks and open space.