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The San Luis Valley is located in south-central Colorado and northern New Mexico , and provides drainage to an area of approximately 8000 square miles . We conducted three cycles of three two hour workshops to a total of approximately 80 elementary and middle school teachers . Mining will generally progress from the tops of these hills downward to an elevation of approximately 620 feet or at least five feet above the highest water level in nearby adjacent water wells , whichever is higher . All American countries jointly proclaimed the Pan-American safety zone , an area along the American coast up to a distance of approximately 300 sea miles . We estimate that this accord will lead to the creation of approximately a million U.S. jobs in the next ten years - - not just in communications companies , but in the high-tech equipment sector and a range of industries such as software , information services , and electronic publishing .