Newsletter 'Hydroline' relied on a variety of contributions from Rubicon and Kiewa Groups. Each group was encouraged to write in the section "Getting to Know Ourselves". During the 1980s, communication was encouraged between the SEC working groups as their roles became more remote from each other.Miscellaneous number 1981-1986 of the monthly newsletter with several pages stapled at the top left hand corner. 1981 has 2 red small towers joined with title in the middle. The 1982 - 1984 have SEC logo top centre with McKay Pipeline drawn underneath and title between the two.hydroline newsletter, sec newsletter, sec workers at kiewa