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Ralston Quarry Slope Stability <br /> PURPOSE AND SCOPE OF STUDY <br /> This report presents the results of an initial geotechnical and slope stability evaluation <br /> performed by GROUND Engineering Consultants, Inc. (GROUND) of the west-facing <br /> slope on the Asphalt Paving Company aggregate quarry property north of Golden, <br /> Colorado. Our study was conducted in general accordance with GROUND's Proposal <br /> No. 1807-1305, dated July 23, 2018. <br /> We understand that Asphalt Paving Company has been required to develop a remedial <br /> approach to provide long term stability of the west-facing slope of the ridge facing <br /> Ralston Reservoir. We also understand that Asphalt Paving Company has been asked <br /> to evaluate the long term stability of the stockpile where material displaced in a recent <br /> slope failure has been placed. <br /> A field exploration program was conducted to obtain information on the surface and <br /> subsurface conditions. Material samples obtained from several test holes were tested in <br /> the laboratory to provide data on the classification and engineering characteristics of the <br /> on-site soils. This report has been prepared to summarize the data obtained and to <br /> present our initial findings and conclusions based on the subsurface conditions <br /> encountered to develop approaches to stabilize the slope in question. <br /> This report should be understood and utilized in its entirety; specific sections of the text, <br /> drawings, graphs, tables, and other information contained within this report are intended <br /> to be understood in the context of the entire report. This includes the Closure section of <br /> the report which outlines important limitations on the information contained herein. <br /> This report was prepared for the planning purposes of the Asphalt Paving Company <br /> based on our understanding of the project at the time of preparation of this report. The <br /> data, conclusions, opinions, and geotechnical parameters provided herein should not be <br /> construed to be sufficient for other purposes, including the use by any other parties for <br /> any reason not specifically related to the design of the project. Furthermore, the <br /> information provided in this report was based on the exploration and testing methods as <br /> described. Deviations between what was reported herein and the actual surface and/or <br /> subsurface conditions may exist, and in some cases those deviations may be significant. <br /> Job No. 18-3046 GROUND Engineering Consultants, Inc. Page 1 <br />