Abandoned mine drainage and water supply
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Abandoned mine drainage and water supply

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mc allister june 19 2013

mc allister june 19 2013

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    Abandoned mine drainage and water supply Abandoned mine drainage and water supply Presentation Transcript

    • Abandoned Mine Drainage and Water Supply Andy McAllister Regional Coordinator Western PA Coalition for Abandoned Mine Reclamation andy@wpcamr.org
    • What is AMD? • Abandoned vs. “Acid” • Pre- 1977 • Bituminous region and Anthracite region
    • Extent of the problem • PA has the most abandoned mine problems of any state. • Affects surface waters from abandoned discharges. • Mine pools below the surface. Some may be reasonable quality. • Contamination from runoff from surface disturbances as well
    • Main constituents of concern in AMD affecting water supplies in Eastern Coalfields • Fe • Al • Mn • Acidity • Sulfates
    • Treatment options for surface discharges • Hard to pigeonhole treatment technology. Every discharge different. • Passive vs Active treatment – Cost – Ownership of systems – Available land – Operations/Maintenance
    • Can we treat the discharges that enter surface waters? • Fe, relatively easy, – aeration, settling • Mn, more difficult, high pH required • Al, relatively easy, increase pH • Acidity, relatively easy, using limestone, chitin • Sulfate – Bioreactors, don’t remove all. – RO, can be done but very expensive.
    • Water wells and Mine pools • Some water wells in coalfields are tapping into abandoned mine pools. • Some Mine pools may be relatively good quality. • Changes in pool level can initiate problems— can expose a new reactive area in mine.
    • Surface Mining Control and Reclamation Act of 1977 • Provides for states to use part of their annual grant toward providing water supplies to areas affected by past mining activities.
    • Questions? Thank you!