24-MMP-A4 Mine Valuation and Mineral Resource Estimation · December 2013
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
EGBC National Exam — Mining and Mineral Processing Engineering, 09-Mmp-A4 Mine Valuation and Mineral Resource Estimation, 2013-Dec. 3 hours duration; one handwritten 8.5×11 in reference sheet permitted (not an open-book exam); only approved Sharp or Casio calculators allowed. Question 1 is compulsory (40 marks, parts 1.1–1.7); candidates then select FOUR of the six optional Questions 2–7 (15 marks each) to complete the paper.
Reference texts: Isaaks & Srivastava, An Introduction to Applied Geostatistics (variogram modelling, kriging estimators, compositing and support); Hustrulid, Kuchta & Martin, Open Pit Mine Planning and Design (NPV/cut-off grade methodology, cost estimating, financing structures); Torries, Evaluating Mineral Projects: Applications and Misconceptions (SME) (mine valuation, cost of capital, inflation treatment); Gentry & O'Neil, Mine Investment Analysis (net smelter return, smelter/refining contract terms); SME Mining Engineering Handbook, 3rd ed. (mineral economics, capital and operating cost estimating).
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
1.4.1 Equity. Raising capital by selling shares (public offering, private placement, streaming/royalty-adjacent equity deals) suits an owner with a strong deposit but limited balance-sheet capacity, and is advantageous when debt markets are closed (pre-production, no cash flow to service debt) or when the owner wants to avoid fixed repayment obligations regardless of commodity-price cycles. Disadvantage: it permanently dilutes the owner's ownership fraction and future profit share, and cedes some governance control to new shareholders.
1.4.2 Loan (debt). Project-finance or corporate debt lets the owner retain full ownership and 100% of the upside, and interest is tax-deductible, making it advantageous once the deposit is well enough defined (bankable feasibility study, defensible reserves) to secure lender confidence and collateral. Disadvantage: repayment (principal and interest) is a fixed obligation regardless of actual mine performance, lenders impose covenants and security over the asset, and a commodity-price downturn that impairs cash flow can trigger default even though ownership was preserved.
1.4.3 Contract. Engaging a contract miner (or a streaming/prepayment arrangement where a financier advances capital against a fixed future delivery of metal or concentrate) transfers operating risk and capital intensity to a specialist counterparty, and is advantageous when the owner lacks in-house mining capability or wants financing without adding conventional debt or diluting equity. Disadvantage: the owner gives up a share of future revenue or production (often at a below-market fixed price under a stream) for the life of the arrangement, and remains exposed if the contractor underperforms or the counterparty's own creditworthiness deteriorates.
1.4.4 Joint Venture. Bringing in a partner (often a larger company with capital and technical/operating expertise) to jointly fund and develop the deposit is advantageous when the owner needs both money and know-how (e.g. large-scale open-pit or underground engineering experience) that it does not itself possess, spreading capital risk across two balance sheets. Disadvantage: the owner permanently shares both control and future profit with the JV partner, and JV agreements are prone to disputes over funding calls, dilution formulas and operatorship.
1.4.5 Lease. Leasing capital equipment (rather than purchasing it outright), or leasing the mineral right itself to an operator in exchange for a royalty, avoids a large up-front capital outlay and preserves the owner's cash/borrowing capacity for other uses – advantageous for a cash-constrained owner or for equipment with rapidly evolving technology. Disadvantage: ongoing lease payments accumulate over the asset's life (often exceeding outright purchase cost) and, in the case of leasing the deposit to an operator, the owner forgoes the larger development upside in exchange for a smaller, more certain royalty stream.
