As a sample of reassessment of civil engineering big projects executed after the Second World War, merits and demerits of Kojima Bay dike are analyzed based on the articles of the Sanyo Shinbun, which is a local newspaper in Okayama. The trend of environmental awareness in the articles can be divided into three periods during this half century, and the concern of the paper has been shifted from an agricultural problem to an environmental problem. In general, newspaper articles are strongly influenced by the reader's interests and don't always show the real situations, but the authors dare to re-evaluate the significance of Kojima Bay dike project from the viewpoint of newspaper.