| 21. | Mild amounts of acid mine drainage affect the West Branch and its tributaries.
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| 22. | The Tioga River's acidity is caused by acid mine drainage.
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| 23. | During this time period acid mine drainage ( AMD ) began contaminating Leviathan Creek.
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| 24. | Many of these tributaries are affected by acid mine drainage.
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| 25. | There, acidic mine drainage containing toxic metals is projected to go on for centuries.
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| 26. | There are six locations in the Solomon Creek watershed where mine drainage is discharged.
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| 27. | Many abandoned mines throughout Colorado are known to have problems with acid mine drainage.
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| 28. | The acid mine drainage came from mines in and near the city of Hazleton.
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| 29. | Acid mine drainage is caused by both abandoned mines and mines in current excavation.
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| 30. | They would be suitable for relatively small flows or less complex acid mine drainage.
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