Laserfiche WebLink
• SENECA COAL COMPANY <br />MOISTURE-DENSITY TESTING FOR SENECA COAL COMPANY <br />June 19, 2001 <br />Four representative material samples (Sandy Clay, Very Sandy Clay, Silty Sand, and Sandstone) were <br />collected and standazd Proctor tests (ASTM D698) were conducted in 1999 to assist in the QA/QC <br />procedures to assure that the placement of fill meets the design and engineering compaction <br />specifications for the approved designs in the PAP. Seneca and Montgomery Watson personnel <br />collected the samples and I~iorthwest Colorado Consultants conducted the testing. These tests <br />resulted in maximum dry densities ranging from 103 pcf (sandstone) to 111.4 pcf (very sandy clay). <br />The mote conservative density of 111 pcf was selected as the target level for density testing during the <br />construction of all haul roads and pond embankments in the II-W and Yoast Mine azeas. The results <br />of the Proctor tests aze included in Attachment A, Moirturt-Dewily Relntianrhip. <br />Seneca II-W Mine <br />Haul Road I <br />Seneca completed Haul Road I construction in 2000. Montgomery Watson personnel conducted <br />density testing on June 19, 2001 at five (5) locations as shown on the attached drawing. A summary <br />of the field density testing results aze presented in Appendix B, Freld Tctt Reru!!t. All test results were <br />above the required 90% of the maximum dry density value of 111 pcf. <br />• <br />• <br />/:\.'U0J08 S.um\Fi./d Tunn;\Hov/Hmd I T.nl d Svwnoy Ow <br />