One of the most urgent costs imposed on mine owners is the environmental costs of preventing, reducing, or compensating for adverse environmental impacts of mining activities. These costs sometimes increase to the point that mining becomes uneconomical. In the meantime, the most significant issue for mine owner’s inaccurate economic evaluation and less uncertainty is to include these costs in feasibility studies and evaluations. The most critical issue here is to quantify the environmental costs (per Ton of extracted ore), which have not reported to be focused. This study provided a framework-based methodology to solve this challenge. The methodology considers the most critical factors influencing the environmental costs in the life cycle of a mine. This method was implemented using Songun copper mine dataset for open-pit and block-caving sections. Results indicated that the environmental cost per Ton of the extracted materials was $0.0306 and $0.0224 for open-pit and block-caving sections, respectively. Since the environmental impacts of open-pit activities are higher than block-caving activities, higher costs are needed to prevent, reduce, and compensate the environmental impacts of open pit than block caving. The main superiority of this method is the possibility of its simple application for any mine located in any country.