1 Update on the Acid Drainage Technology Initiative (ADTI), the INAP Global Alliance Member Representing the United States 1 Charles H. Bucknam 2 , Eric Perry 3 , Dennis Turner 4 , Linda. A. Figueroa 5 , Devin Castendyk 6 , L. E. Eary 7 and Jim J. Gusek 8 2 Newmont Metallurgical Services, Englewood, Colorado, USA Charles.Bucknam@Newmont.com 3 USDI Office of Surface Mining, Pittsburgh, Pennsylvania, USA eperry@osmre.gov 4 Arizona Department of Environmental Quality, Phoenix, Arizona, USA Turner.Dennis@azdeq.gov 5 Colorado School of Mines, Golden, Colorado, USA lfiguero@Mines.edu 6 Earth Sciences Dept., State University of New York, Oneonta, New York, USA castendn@oneonta.edu 7 MWH Americas, Inc., Fort Collins, Colorado, USA Ted.Eary@mwhglobal.com 8 Golder Associates, Denver, Colorado USA Jgusek@golder.com ABSTRACT. The Acid Drainage Technology Initiative is the regional organization in the United States that is participating in the International Network for Acid Prevention (INAP) Global Alliance, overseeing the continued success of the International Conferences on Acid Rock Drainage (ICARD), held every three years. Earlier reports to ICARDs are referenced and the paper is focused on the activities over the past three years. The recent representation on the ADTI Operations Committee is covered and the statement of mutual intent signed with the Interstate Technology and Regulatory Council is covered. The coal mining sector (CMS) website and steering committee is described as well as recently completed work on selenium, standardization of a coal overburden kinetic column test and hydrological studies in underground coal mines. Selenium research continues as well as reviews of passive treatment technologies, application of contaminant transport modeling and development of the Global Acid Rock Drainage (GARD) Guide with INAP. The metal mining sector (MMS) organization and initial publication of the ADTI-MMS workbook volumes on basics of mining influenced water (MIW) and two additional volumes on mitigation and pit lakes that have completed consensus review for publication are covered. Three additional volumes are being drafted and publication of a standard method appendix is possible. The organization of the initial GARD guide workshop is covered as well as the scientific review team; technical programming, the university network and transfer of the website are reviewed. Additional Key Words: International network for Acid Prevention, interstate technology and regulator council, coal mining sector, metal mining sector, GARD guide. INTRODUCTION The origins and previous activities of the ADTI have been presented at previous International Conferences on Acid Rock Drainage (ICARDs) in Hornberger et. al. (2000) Williams, (2003) and Van Zyl, D. J. A. (2006) and will not be repeated here. This paper will focus on the activities of ADTI since the 7 th ICARD in St. Louis. Missouri, USA, in February, 2006. In _______________________________ 1 Paper was presented at the 2009, Securing the Future and 8 th ICARD, June 22-26, 2009, Skellefteå, Sweden.