Two board members of the body that protects the Great Barrier Reef reportedly have substantial mining interests and links to corrupt former NSW Labor minister Eddie Obeid.

Documents obtained by the ABC show the Great Barrier Reef Marine Park Authority (GBRMPA) has taken an increasingly weaker position on new port developments near the reef.

Documents obtained by the ABC suggest two board members of the body that protects the Great Barrier Reef have mining interests and links to corrupt former NSW Labor minister Eddie Obeid.

Greenpeace spokeswoman Louise Matthiesson says that's because two board members have potential conflicts of interest.

Jon Grayson is director-general of Premier Campbell Newman's department and represents the state on the board.