[en] Environmental Impact Assessment is a process of identifying, predicting and mitigating the negative impacts of development projects on physico-Chemical, biological, socio-economic and cultural environments. The main purpose of Environmental Impact Assessment process is to inform decision makers of the likely impacts of a proposal before a decision is made.Environmental Impact Assessment provides an opportunity to identify key issues and stakeholders early in the life of a proposal so that potentially adverse impacts can be addressed before final approval decisions are made. There are different methods for implementing an Environmental Impact Assessment project. The best method is one, which can quantify the impacts and assess the impacts rapidly. This paper attempts to investigate and compare capabilities of the Environmental Impact Assessment prevalent methods including questionnaire, matrix, system analysis, maps overlay, networks and ELECTRE-TRI multi-criteria decision method. This paper indicates that ELECTRE_TRI is an appropriate method for Environmental Impact Assessment projects. However, the final judgment of the selection of Environmental Impact Assessment method depends on the Environmental Impact Assessment experts opinions.