Acid Rock Drainage (ARD) is is one of the most serious and potentially enduring environmental problems for the mining industry. Left unchecked, it can result in such long-term water quality impacts that it could well be this industry’s most harmful legacy. Effectively dealing with acid drainage is a formidable challenge as indicated by the high liability cost carried by many mining companies.

The International Network for Acid Prevention (INAP) is an industry-led group created to help meet this challenge. INAP exists to fill the need for an international body which mobilizes acid drainage (ARD) information and experience. The network was founded in 1998. Since then INAP has become a proactive, global leader in this field.

In 2009, INAP published the GARD Guide, a best practice guide for the prevention and mitigation of ARD. Since that time, the GARD Guide is rapidly becoming recognized as the premier global guide on this topic. The GARD Guide is free for all to use and is found on the internet at:


Agnico Eagle Mines
Anglo American
Barrick Gold Corporation
Detour Gold
Kinross Gold Corporation
Lundin Mining
Newcrest Mining Limited
Newmont Mining Corporation
Rio Tinto
Teck Resources Limited

INAP Technical Manager:

Gilles Tremblay is the INAP Technical Manager since 2016. Prior to joining INAP, Gilles had over 30 years of experience with Natural Resources Canada, with many of those years participating and managing the MEND program.

Please send any news items and/or comments you may have to Gilles Tremblay at

INAP Member Area