Laserfiche WebLink
Response to CDRMS Comments Mr. Robert Noren, P.E. <br /> Disposal ofAlluvial Fill Cotter Corporation(N.S.L.) <br /> Atterberg Limits: Atterberg limits were determined on each bulk sample in accordance with <br /> ASTM test method D4318. Using the results of the grain size analyses and the Atterberg limits <br /> the samples can be classified according to the USCS classification. For the waste rock the top of <br /> south pile (EA-TP2) was classified as a clayey sand. The other waste rock samples were <br /> classified as silty/clayey gravel or poorly graded gravel with silt. The alluvial material was <br /> classified as poorly graded gravel with clay and the colluvial material was classified as clayey <br /> gravel. The topsoil was classified as poorly graded sand with clay. <br /> Larize Scale Direct Shear Testing: Large scale internal direct shear testing was completed on <br /> each of the bulk samples collected from the site. The direct shear testing was completed with a <br /> 12-inch square box in general accordance with ASTM D3080. The peak friction angle for the <br /> topsoil was 41.2 degrees, the colluvial material was 51.3 degrees, and the alluvial material was <br /> 51.6 degrees. The peak friction angles for the waste rock were measured to be 25.1, 50.9, 52.9, <br /> and 54.1 degrees. The peak friction angle of 25.1 degrees was measure on EA-TP2 and as shown <br /> with the other testing this sample had significantly more fines than the other samples. <br /> October 26, 2016 A-2 Engineering Analytics, Inc. <br />