construction project, including reservoir dams, along with undeniable positive impacts has always been coupled with inevitable adverse side effects on the environment. Therefore, it is necessary to adopt appropriate managerial measures for mitigating the adverse effects and preventing serious disruption to the life of people affected by the project. Accordingly, the current study was carried out with the aim of applying a new method called “Monavari 2001” to assess socio-cultural impacts of the Siah Bishe Dam within constructional and operational phases. For this purpose, a total number of 94 questionnaires were distributed among relevant experts. In order to interpret the questionnaires using SPSS software, all the questions have been coded separately. The obtained results suggest that about 33.7% of total temporary impacts related to the constructional phase are positive, while approximately 66.2% of them are estimated to be negative. Meanwhile, around 80% of the total permanent impacts are positive and the rest are negative. In other words, the long-term positive impacts have dominance over the negative consequences. The current study shows how the Monavari 2001 method can be affective in handling social impact assessment studies.