Laserfiche WebLink
upper levels to the slotted portion. We backfilled the remainder of each boring with coal refuse. The <br />I various piezometer instruction details are shown on Figs. 2 through 5 in Appendix A. A <br />representative of Wyoming Fuels measured the water levels in these pipes periodically to determine <br />rf there was change in the water level. The depth to water measurements were as follows: <br />1 <br /> <br /> <br />HOLE GROUND DEPTH DEPTH TO WATER FROM GROUND SURFACE <br /># ELEVATION OF HOLE 4~-91 4~-91 4-9-91 <br />103 7580.53 69.0 66.3 66.4 66.3 <br />104 7583.01 10.0 3.6 3.7 4.0 <br />106 7580.65 54.0 45.3 44.9 45.2 <br />107 7580.82 24.0 19.7 21.2 19.7 <br />The water levels in the deeper borings did not rise to the level of our shallow boring. The water <br />level in the shallow boring did not decrease over time. From this information we believe the depth to <br />the free water surtace was no more than four feet and the fill is relatively impermeable. The upper <br />(20 toot) wet layer does not appear to be draining quickly. <br />• <br />LABORATORY TESTING <br />Samples of the refuse materials were returned to our laboratory. These samples were tested <br />• for gradational characteristics as well as plastic and liquid limits, moisture content, density, specific <br />gravity, standard Proctor compaction and direct shear strength. The following paragraphs describe <br />the test results. Laboratory data is summarized in Appendix B. <br />• <br />• <br />Moisture/Density <br />Density tests were performed on samples which were extruded from Shelby tubes and <br />4 <br />• <br />