. Effects of the June, 1975 Mike Horse mine tailings dam failure on water quality and aquatic resources of the Upper Blackfoot River, Montana . i i MONTANA BUREAU OF MINES AND GEOLOGY ^J BUTTE, MONTANA 59701 Mine Tailings Analyses Results July 21, 1975 Table I Water Extract - C558 ml) Cd Cu Fe Ni Pb Zn mg/1 (ppm) ' â I 608. 144,800. 1,232. 2,780. .069 i fe fe fe fe 002 troy ^ 370 troy p * V Note: Au and Ag were determined by fire assay Table III Size Gradation (Sieve) Analysis - Segment "B' Tyler Sieve (mesh) Standard No. + 60 -60 -80 -100 -150 Grams
. Effects of the June, 1975 Mike Horse mine tailings dam failure on water quality and aquatic resources of the Upper Blackfoot River, Montana . i i MONTANA BUREAU OF MINES AND GEOLOGY ^J BUTTE, MONTANA 59701 Mine Tailings Analyses Results July 21, 1975 Table I Water Extract - C558 ml) Cd Cu Fe Ni Pb Zn mg/1 (ppm) ' â I 608. 144,800. 1,232. 2,780. .069 i fe fe fe fe 002 troy ^ 370 troy p * V Note: Au and Ag were determined by fire assay Table III Size Gradation (Sieve) Analysis - Segment "B' Tyler Sieve (mesh) Standard No. + 60 -60 -80 -100 -150 Grams Recovered (W/W) (cont.) A-57- T-E BUREAU Of MINES ANO GEOLOGY WAS ESTABLISHED. BV LAW IM 19 113 TO PROMOTE EFFICIENT DEVELOPMENT OF MONTANA'S v.,NEPAL RESOURCES Br GATHERING AND PUBLISH- ING INFORMATION ON THE GEOLOGY. TOPOGRAPHY. AND MINERAL DEPOSITS OF THE STATE. INCLUDING METALS. NON-METALS. COAL OIL. GAS. AND UNDERGROUND WATER SUPPLY. fe I fe fe
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