Hossein Armin - Student Research Committee, Department of Health in Disasters andEmergencies, Faculty of Medical Information and Management, Shiraz Universityof Medical Sciences, Shiraz, Iran
Ahmad Yousefi Nasab - Department of environmental health engineering, school of health, YasujUniversity of Medical Sciences, Yasuj, Iran
Seyed Maysam Hosseini Dehbaraftab - Department of environmental health engineering, school of health, YasujUniversity of Medical Sciences, Yasuj, Iran.
Hossein Elahi Far - Social Determinants of Health Research Center , Yasuj University of MedicalSciences , Yasuj , Iran

A dam construction project is exposed to various risks due to the amount of investment, duration of implementation, the complexity of design and implementation, etc., and these risks will lead to human and financial losses. Thus, based on three principles, including (i) time, (ii) quality, and (iii) cost, identifying, assessing, ranking risks, and Occupational Safety and Health (OSH) can have a significant impact on project objectives. The machinery maintenance unit has the largest share of the organization's cost model. Manpower, tools, spare parts, and working standards of planning and scheduling are the most important elements of the implementation of the maintenance process in these organizations.

Risk assessment, Fuzzy analytical hierarchy process, Occupational health and safety.