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from bulk, relatively intact pieces of the above-described <br />materials. The average unit weight of the individual spoil <br />particles at !line No. 3 is 112 pounds per cubic foot (pcf). This <br />unit weight includes natural field moisture. <br />Bield Density Teats on Overburden <br />In order to evaluate the amount of bulking that would occur <br />when the overburden vas eacavated and lumped into loose piles, field <br />density testa were made at various locations on the mine site. <br />Specifically, large sand cone density teats were attempted at three <br />locations. These teats were performed by ezcavating a small hole in <br />the spoil pile and filling the hole with sand to determine the <br />volume of the hole. In addition to the sand cone procedure, nuclear <br />• moisture density testa were made using a neutron tranceiving gauge, <br />which can be eztended into the teat area 12 inches. The tea[ area <br />vas levelled and the teat was run by inserting the probe into the <br />ground in 2-inch increments and making a reading at each 2-inch <br />increment. Additionally, because of the influence of voids on a <br />nuclear test, the spoil teats were checked by rotating the nuclear <br />gauge 90 degrees and making four readings at each level. The <br />results of these testa are show below. The reported density is the <br />average of a aeries of readings for the nuclear gauge. <br />C~ <br />2.04-30 <br />