The proposed Denison 3D Seismic survey, which is proposed to commence in the fourth quarter of 2004, will take place within a survey area with an estimated gross area of approximately 394 square kilometres (39400 hectares). Approximately 782 hectares (2% of the gross area) will be directly accessed by survey activities. Approximately 11,455 hectares (29% of the gross survey area) occurs in nature reserves and a further 9,900 hectares (25% of the gross survey area) supports native vegetation.