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(� MORRISON-KNUDSEN COMPANY,INC. <br /> I <br /> Another disadvantage of this second site is that due to longer trans- <br /> portation distance from the coal washing plant, a larger cost will be in- <br /> volved, compared to the cross-ridge site. <br /> 1 .6 REFUSE & FOUNDATION MATERIALS SAMPLING AND TESTING <br /> This report section documents the geotechnical investigation under- <br /> taken to determine the physical characteristics of the refuse material at <br /> the Mid-Continent Coal and Coke Co. 's Coal Basin coal preparation facility. <br /> The field investigation and laboratory testing were authorized under Con- <br /> tract Change Notice No. 1 on June 21 , 1977. Drilling and sampling were <br /> performed by Engineering Testing Laboratories of Phoenix, Arizona, under <br /> the supervision of a M-K geotechnical engineer. The field work was done <br /> in July, 1977, and subsequently the samples were shipped to the labora- <br /> tories of Washler and Associates , in Palo Alto, California, on the last <br /> week of August, 1977. The laboratory testing program was formulated by <br /> M-K engineers and was finalized after a visit to the office of Wahler and <br /> Assoc. and consultation with their engineers. The results of this labor- <br /> atory tests were presented in a report by Wahler and Assoc. on October, <br /> 1977 A few additional tests were performed at M-K's request and the <br /> results were sent to M-K on December 6, 1977. This full report document <br /> was then transmitted to Mid-Continent on December 22, 1977. <br /> 1 .6.1 Drilling and Sampling <br /> The objects of the field investigation were as follows: <br /> o To obtain "disturbed" and "undisturbed" samples <br /> of the refuse and foundation material . <br /> To determine the field density of the refuse material <br /> r• <br /> � Iq- Cof'✓r � � 1�ii's r�P,f�oT� � 1-14/ <br /> II <br />