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..a: • ._.RA..( ..I2A_ _...� - ...iw i.....u+. ....4•^'.. .sO.n^.a'�".+�� ,.G�__�3 =�..�.. .a...... _.... ��. .ef_ » a,,..,,.....m.J.sdL...96_. _ ..A _.___. ..�..�._ <br /> OHS ONCE <br /> [JIN/OIYII[�1ntMW ild AjUll07 <br /> Thomas A. Colbert Page 5 <br /> Recognizing the potential difficulty of revegetating mining disturbances at Lake <br /> Emma,the Sunnyside Gold Corporation has undertaken a program of revegetation <br /> field plot trials. Twelve plots,covering a total area of 2,500 square feet,were <br /> consmxted and seeded in late August, 1988,by IMS Inc. The purpose of these <br /> plots is to test revegetation on three growth media using various amendments(or <br /> treatments). <br /> The field plot trials at Lake Emma have been designed to address the problems of <br /> acid formation,nutrient cycling,and plant species adaptation. The study comprises <br /> four plots on each of three growth media,for a total of 12 plots. The media are(I) <br /> lake sediments,(I>)lake sediments covered with sin inches of fresh topsail,and <br /> (III) waste rock covered with six inches of fresh topsoil. The four plots on each <br /> growth medium each comprise one of three treatments plus a control plot Besides <br /> the(1)control,these treatments are(2)organic amendment(manure+peat moss), <br /> (3)organic amendment and pH control,and(4)organic amendment,pH control, <br /> and fertilizer. Each plot is 14 feet by 15 feet. <br /> The plots are situated near the south end of the Lake Emma disturbed area,just <br /> above the outlet of the drainage diversion channel. The area is on fairly level grade <br /> in a location which will not be disturbed by mining activities. This area was <br /> selected in part because there is a clear boundary between waste rock on the south <br /> half of the area and lake sediments on the north half. Thus it was possible to have <br /> plots on waste rock and lake sediments in a contiguous area,and to spited topsoil <br /> on both in one operation. A bucket loader was used to place topsoil on the plots. <br /> The topsoil came from stockpiles recently constructed in connection with nearby <br /> open pit mining activities. Following rough grading of the topsoiled plots,all plots <br /> were hand tilled with a spade and pick-axe. Amendment materials, such as lime, <br /> manure and fertilizer were carefully spread on the appropriate plots according to the <br /> plot layout and design. Plots were then thoroughly hand raked to incorporate <br /> amendments into the soil and to prepare a smooth surface for seeding. All plots <br /> then were seeded with the same seed mixture and lightly raked. Seeding of all plots <br /> took place on August 31, 1988. <br />