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What Is A Confined Space?

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San Juan County Historical Society Mining Heritage Center ~ Mining Museum, Jail & Archive ~ Silverton, Colorado The "Girl" is the centerpiece of the Museum and is marked by a 100 foot excessive steel headframe. Once mined to a depth of 3200 feet, she produced silver, lead and zinc https://codyqcnqr.tusblogos.com/5899907/a-tenth-of-u-s-veteran-coal-miners-have-black-lung-disease

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