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Ampliación Plan De Cierre Temporal Y Parcial Pascua-Lama

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Ampliación Plan De Cierre Temporal Y Parcial Pascua-Lama Ampliación Plan de Cierre Temporal Parcial “Proyecto Pascua Lama” Región de Atacama Mayo, 2019 Elaborado por: Gestión Ambiental Consultores S.A. General del Canto 421, Piso 6, Providencia Fono: +56 2 2719 5600 www.gac.cl Plan de Cierre Temporal “Proyecto Pascua Lama” INDICE GENERAL 1. Resumen Ejecutivo ...................................................................................................................... 1 1.1. Introducción .................................................................................................................................. 1 1.2. Alcance y objetivos de la ampliación del Plan de Cierre Temporal Parcial ................................... 2 1.3. Instalaciones a las cuales se extiende el Plan de Cierre Temporal Parcial .................................... 2 1.4. Descripción de las instalaciones objeto de la ampliación del Plan de Cierre Temporal ............... 3 1.5. Obras, acciones y medidas propuestas ......................................................................................... 6 1.6. Instalaciones que se mantendrán operativas ............................................................................... 7 1.7. Plan de seguimiento ...................................................................................................................... 7 1.8. Prevención de riesgos y seguridad de las personas ...................................................................... 8 1.9. Plazo de duración e hito y actividades de la reapertura de la operación ..................................... 8 1.10. Programa de Difusión ................................................................................................................ 9 2. Introducción ............................................................................................................................... 9 3. Tipo de Plan de Cierre ............................................................................................................... 11 4. Antecedentes generales de la faena .......................................................................................... 12 4.1. Identificación de la Faena ............................................................................................................ 12 4.1.1 Nombre de la Faena Minera y/o Proyecto .......................................................................... 12 4.1.2 Antecedentes del Representante Legal del Titular ............................................................. 13 4.1.3 Antecedentes Legales de la Propiedad Minera ................................................................... 13 4.1.4 Resoluciones de Sernageomin............................................................................................. 14 4.1.5 Resoluciones de Calificación Ambiental (RCA) .................................................................... 14 4.1.6 Producción mensual de mineral a extraer o procesar ........................................................ 15 4.2. Ubicación de la Faena .................................................................................................................. 15 4.3. Descripción de la Faena ............................................................................................................... 17 4.4. Metodología de Evaluación de Riesgos Utilizada en la Faena .................................................... 21 4.5. Individualización de las RCA aplicables a la Faena. ..................................................................... 22 5. Descripción del Entorno ............................................................................................................ 23 5.1. Definición del entorno según componentes ambientales .......................................................... 23 5.2. Descripción de componentes ambientales ................................................................................. 25 5.2.1 Clima y Meteorología .......................................................................................................... 25 5.2.1.1 Clima .................................................................................................................................... 25 5.2.1.2 Meteorología ....................................................................................................................... 25 5.2.2 Calidad del Aire .................................................................................................................... 30 5.2.3 Geología, Geomorfología .................................................................................................... 32 5.2.3.1 Geología ............................................................................................................................... 33 5.2.3.2 Geomorfología ..................................................................................................................... 34 5.2.4 Riesgos Naturales ................................................................................................................ 35 5.2.4.1 Riesgo sísmico ..................................................................................................................... 35 5.2.4.2 Riesgo de avalanchas ........................................................................................................... 35 5.2.4.3 Riesgo de aluviones ............................................................................................................. 36 5.2.4.4 Presencia de fallas. .............................................................................................................. 36 i Plan de Cierre Temporal “Proyecto Pascua Lama” 5.2.4.5 Estabilidad de taludes ......................................................................................................... 36 5.2.4.6 Volcanismo .......................................................................................................................... 36 5.2.5 Hidrología e Hidrogeología .................................................................................................. 37 5.2.5.1 Hidrología ............................................................................................................................ 37 5.2.5.2 Hidrogeología ...................................................................................................................... 38 5.2.6 Calidad del Agua .................................................................................................................. 40 5.2.6.1 Evolución del Caudal y Calidad del Agua Superficial ........................................................... 40 5.2.6.2 Evolución del Nivel Freático y Calidad del Agua Subterránea ............................................. 46 5.2.7 Glaciares .............................................................................................................................. 52 5.2.8 Suelos .................................................................................................................................. 55 5.2.9 Flora y Vegetación ............................................................................................................... 55 5.2.10 Fauna ................................................................................................................................... 55 5.2.11 Arqueología ......................................................................................................................... 56 5.2.12 Paisaje .................................................................................................................................. 56 5.2.13 Medio Humano .................................................................................................................... 56 6. Vida útil .................................................................................................................................... 57 7. Análisis de las instalaciones y medidas de cierre temporal parcial. ............................................. 57 7.1. Introducción ................................................................................................................................ 57 7.2. Instalaciones Mineras .................................................................................................................. 60 7.2.1 Rajo .......................................................................................................................................... 60 7.2.2 Botadero de estériles Nevada Norte ....................................................................................... 64 7.2.3 Túnel correa............................................................................................................................. 68 7.2.4 Sector chancado primario ....................................................................................................... 70 7.3. Infraestructura de apoyo ............................................................................................................. 71 7.3.1 Infraestructura de apoyo - Sector Mina .................................................................................. 72 7.3.2 Infraestructura de apoyo - Sector Pascua ............................................................................... 76 8.1.2 Infraestructura de apoyo - Sector Campamento Barriales ..................................................... 80 9. Instalaciones y actividades que se mantendrán operativas ......................................................... 84 9.1. Caminos internos
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