![]() Coal Mining Federal Effluent Limitations Guidelines.Coal Mining (extracting coal from underground and surface mines).Mineral Mining and Processing Federal Effluent Limitations Guidelines.Non-Metals Mining and Processing (typically extracting and processing minerals such as gypsum or sand and gravel).Summary of Comments (and EPA Responses) to April 1996 Draft Framework.EPA's Hardrock Mining Framework (September 1997).Ore Mining and Dressing Federal Effluent Limitations Guidelines.Hardrock Mining (typically extracting metallic ores such as iron or copper).The NPDES program regulates discharges from three general categories of mining activities as well as the considerations associated with abandoned mines. The Clean Water Act (CWA) requires all point source discharges from mining operations, including discharges from associated impoundments, be authorized under an NPDES permit. Population growth has intensified the use of aquatic and riparian ecosystems for recreation, and increased the demand on aquifers for domestic water supply. ![]() These situations, combined with an increasing population, make mining issues a priority. watersheds are impacted by both active and abandoned coal mines after 150 years of mining activities. due to active and historic mining of metallic ores (e.g., iron, copper, lead, zinc, molybdenum, tungsten) and precious metals (gold, platinum, and silver). ![]() Mining has impacted thousands of miles of streams and rivers throughout the western U.S. Impacts from operating as well as abandoned mines can cause extensive losses of aquatic and terrestrial habitat. These operations generate tailings and waste rock for disposal and also create wastewater discharges and air emissions.Īs a result, mining can affect surface and ground water quality, drinking water supplies and air quality. Mining operations are often complex undertakings that may be situated in or near diverse and sensitive environments. and that have, or will have, an NPDES permit.
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