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Ellis offers premium valuation services throughout the USA and around the world. Contact us to discuss the details of your project and see if we’re the right fit.

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Expert Witness

Mr. Ellis is often called upon to conduct expert valuation research for litigation cases involving mineral properties, including mines and quarries. He has also testified as an Expert Witness in depositions and trials at many court levels, including internationally. In some cases he may be an expert retained on behalf of a mining company, while in others he may be retained by a party opposing a mining company. The majority of litigation cases for which Mr. Ellis has been retained, a settlement was reached shortly after he delivered his fact-based report.

EIS retains additional expertise as necessary, particularly in mining engineering and geostatistics.

Key Benefits

The mineral property market value appraisal expertise of Mr. Ellis for exploration tracts, mines and quarries is well recognized in the U.S. and international minerals industry. Professional writings of Mr. Ellis are quoted in court cases in which he has not been personally involved. He is devoted to ethical principles and lack of bias in his work, and has unsurpassed knowledge of standards for the combination of mineral resource-reserve classification and fair valuation of mineral property interests.

Ellis’s experience has allowed him to testify on multiple aspects of a mineral property, including: geology, exploration strategies, physical property tests on crushed stone, mineral resource and reserve estimation, mining methods, mining cost estimates, and mineral product markets, including supply-demand issues for sand, gravel, and crushed stone. For some litigation cases, the law firm that has retained Mr. Ellis has decided to retain no other expert, while opposing counsel has had three or four experts testify. Being a Certified General Appraiser (Colorado) usually allows Mr. Ellis to easily and quickly obtain licensing in other U.S. states.

Our Topic Areas

Mr. Ellis and EIS have been retained to provide expert services for litigations involving a wide range of mineral commodities, pertaining to varied mineral property and business interests, for a variety of dispute, damage, condemnation and regulatory takings, and taxation claims.

Our Expertise

Trevor Ellis has 40+ years of professional experience, which has included working throughout a wide range of aspects of the minerals, petroleum, and other energy industry sectors. This includes working on grass roots minerals exploration projects through feasibility studies, mine development and operation, and site remediation after mine closure. Since 1995, Mr. Ellis has focused his work on market value appraisal of mineral property interests, often selecting the more challenging assignments.

Mr. Ellis is a leading author and frequently invited speaker nationally and internationally on minerals and petroleum industry valuation standards, and other minerals industry topics. He has written or presented approximately 80 professional papers, of which over 40 have been published, 18 of these being published as peer reviewed technical papers.

Ellis chairs the Valuation Standards Committee of the Society for Mining, Metallurgy and Exploration (SME), being its 2012 founder, and has also represented the SME since 2012 on the International Mineral Valuation Committee (IMVAL).
The resultant mineral property valuation standards have been adopted by SME and were published January 2016.

Mr. Ellis was the 2001-2008 Chairman and founder of the Extractive Industries Expert Group of the International Valuation Standards Committee, now the International Valuations Standards Council (IVSC). The standards developed by the Expert Group for valuation of minerals and petroleum industry assets, were first published in 2005 in the International Valuation Standards Seventh Edition. To supplement the standards, the Expert Group also drafted best practice guidelines for valuations in the extractive industries. The guidelines have been adopted by the International Institute of Minerals Appraisers (IIMA).

Ellis holds a MSc Degree in Mineral Economics from the Colorado School of Mines (1978) and BSc Degree in Geology from The University of Melbourne (1970). He has completed graduate level Business Administration studies at The University of Nebraska and The University of Melbourne. He is a past President (2000-2002) of the IIMA with which he is a Certified Minerals Appraiser, a Fellow of The Australasian Institute of Mining & Metallurgy (AusIMM) with which he is a Chartered Professional Geologist, a Certified Professional Geologist with The American Institute of Professional Geologists (AIPG), and is licensed as a Certified General Appraiser (Colorado).