✅ This report has been written to aid those involved with placer mining in the estimation of costs to recover valuable minerals from placer deposits. It relies on the principle that cost estimates will be representative only if calculated for technically feasible mining operations. Because the design of such a n operation can be difficult, provisions have been made to assist the user in achieving this goal. ✅ Source : Cost Estimation Handbook for Small Placer Mines by Bureau of Mines 1987. By Scott A. Stebbins. Publicly available at: https://www.osti.gov/biblio/6429888 Hooman Askari, Linkedin