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G Ground <br />• E En;ineerin~ <br />C Consultants, Inc. <br />October 24, 1991 <br />'_65 S. I~arlan <br />Dem•er, CO 80'.6 <br />P.O. Dcx 170970 <br />Steamboat Springs, CO S0: i7 <br />(303) 879-5596 <br />Job Dame: Construction Observation and <br />Alaterials Testing, Pond at <br />Seneca II-\V Aline, (Dzm <br />Construction) <br />Joh \umber: 91.550 <br />• <br />Peabody Coal Company <br />Drat+•er D <br />Ha}den, CO S1G39 <br />Ann: AIr. Chuck AJcCullough <br />As requested, we visited the project site on tlus date to perform density tests on the material being placed for the dam for <br />Pond 009. <br />Test results and locations are sho+vn Uelow. The test results indicate that some of the material tested did not meet project <br />specifications for density. \j~e obtained a sample of this material and delivered it to our laboratory for moisture-density <br />relationship determination. The laboratory test results will be forwarded upon completion. <br />Test Field Results Laboratory Results <br />(~n. Location D. enth nr.• Den:itv°o Moisture ~ comoaaion ~1DDloc fl `/o~tc soil T~Te <br />1 Dam, CL 8'DRG 10..9 1:.6 100 IC$.2 155 Sandy Sill <br />2 Dam, ]5'Right of CL 8'BRG ]01.4 15.4 94' 10$.2 155 Sandy Silt <br />3 Dam, 10'L,eh of CL 8'BRG 106.4 14.3 9S ]08.2 15.5 Sandr SiII <br />4 Dam, 30"Left of CL B~DRG 100.7 15.0 93' 1D$.2 15.5 Sandy Silt <br />Compaction Requirements: ~1inimum 9570 of Standard Proc~or Density +/-2 <br />of Optimum Voisiure Conicnl. <br />Hal SchGcht <br />Field Represemative <br />Revie+ved b}' Arthur 1. Greengard Jr., P.E. <br />r, <br />U <br />