Open Pit Mine - Planning and Design-3rd Edition

Open Pit Mine - Planning and Design-3rd Edition

(Parte 7 de 7)

(a) The area shall be protected from future contamination resulting from an operator's mining and reclamation activities.

(b) There shall be no contaminated materials remaining at or near the surface. (c) Toxic substances that may contaminate air, water, soil, or prohibit plan growth shall be isolated, removed, buried or otherwise disposed of in an appropriate manner. (d) Waste disposal practices and the reclamation of waste disposal facilities shall be conducted in conformance to applicable federal and state requirements.

2. Subsurface. The subsurface shall be properly stabilized, holes and underground workings properly plugged, when required, and subsurface integrity ensured subject to applicable federal and state requirements.

3. Site stability. (a) The reclaimed area shall be stable and exhibit none of the following characteristics: - Large rills or gullies.

- Perceptible soil movement or head cutting in drainages.

- Slope instability on or adjacent to the reclaimed area. (b) The slope shall be stabilized using appropriate reshaping and earthwork measures, including proper placement of soils and other materials.

(c) Appropriate water courses and drainage features shall be established and stabilized.

4. Water management. The quality and integrity of affected ground and surface waters shall be protected as a part of mineral development and reclamation activities in accordance with applicable federal and state requirements: (a) Appropriate hydrologic practices shall be used to protect and, if practical, enhance both the quality and quantity of impacted waters. (b) Where appropriate, actions shall be taken to eliminate ground water co-mingling and contamination.

(Parte 7 de 7)

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