Environmental Geochemistry and ARD

SRK Consulting has a team of experienced and internationally recognized engineers and geoscientists to develop cost-effective solutions to mine drainage issues ranging from severe acidity to unusual trace elements. These issues are encountered during new mine permitting, optimization of existing operations, development of closure plans and closure of abandoned mines. SRK has more than two decades of experience in addressing drainage chemistry at all stages of the mining cycle. We also assist non-mining clients involved in rock handling, such as utilities, forestry companies and highway construction companies.

 
The cornerstone of SRK’s approach to these projects is that release of acid rock drainage (ARD) is controlled by geological conditions. We therefore work with our clients’ geologists to understand how the geology of their property affects drainage chemistry, and how it can be used to limit potential impacts and engineering costs.
 
ARD potential is also affected by local climatic conditions. We have experience in the full range of global climates including permafrost in the high arctic, temperate regions, and both wet and dry regions of the tropics.
 
Managing mine drainage water quality is a critical concern for all mining operations because discharges from mines typically must meet stringent water quality standards set by local, regional and national governments. Acidic drainage remains the most significant issue due to the high concentrations of metals and costs of treatment to achieve acceptable levels. However, in the last decade or so, awareness of leaching under non-acidic conditions has greatly increased. Drainage chemistry is regulated during all phases of mining, from exploration, though operations and closure. Accurate prediction of leaching effects and design of practical and proven control measures is often critical to the feasibility of projects.