“The water in the Berkeley Pit is highly acidic and high in
concentrations of arsenic, copper, cadmium, cobalt, iron, manganese, zinc, and
sulfate, plus other inorganic constituents. Water-quality samples are collected
semi-annually at selected locations. Water quality in the underground mines was
very acidic and high in metals concentrations when flooding began; however, as
water levels have risen, pH has increased and metals concentrations have
decreased.”
Glenn's official portrait as one of NASA's original seven
Mercury astronauts. Credits: NASA
Missoulian: 10
things to know about John Glenn
Profile
of John Glenn (NASA)
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