Recently, the number of deteriorated concrete structures has been increased and well known to the public. Also, the reinforced concrete structures at ports and harbours have been damaged by salt induced attack, which causes the corrosion of the reinforcing steel bars. Especially, the damages of salt injury are severe at the superstructures of wharves.
　In 1984, Bureau of Port and Harbour carried out a survey on the deterioration of the superstructures of wharves. The collected data are analysed by the authors to clarify the influences of factors on the deterioration.
　In this paper, the outline of the survey and the results of the analysis are presented.