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Addendum to Geotechnical Data Report <br />Bowie Resources, limited <br />July 2002 <br />Section 1 -Introduction <br />1.1 Purpose and Objectives <br />The purpose of this Addendum Report is to present additional geotechnical information that <br />was collected after the Geotechnical Data Report, Bruce Park Dam, Delta County, Colorado <br />was issued in Apri] 2001 (GEI, 2001). Analyses and interpretations of the information <br />collected will be provided in a separate document. The location of Bruce Park Dam is shown <br />on Figure 1. <br />The objectives of the geotechnical field investigation and laboratory testing documented in <br />this Addendum Report were to collect site-specific geotechnical and groundwater <br />information needed to evaluate an existing landslide and to identify if organic material is <br />present at a predetermined location in the right side {looking downstream) of the upstream <br />slope of the main dam. <br />1.2 Scope of Work <br />GEI performed the following scope of work for this project: <br />1. Developed and observed completion of a subsurface investigation program, which <br />included soil and bedrock borings, field testing, and installation ofopen-standpipe <br />piezometers and cable inclinometers <br />2. Performed laboratory tests on selected soil samples collected during the subsurface <br />investigations <br />3. Prepazed this Addendum Geotechnical Data Report <br />1.3 Background <br />Bowie Resources, Ltd. retained GEI Consultants, Inc. in November 2000, to develop a <br />geotechnical exploration program to: a) collect data for use in evaluating potential impacts to <br />Bruce Park Dam from proposed underground coal mining operations, and b) evaluate the <br />feasibility of raising the crest elevation of the dam 3 to 6 feet to increase reservoir storage <br />. volume. The original program included drilling seven borings in the main dam and saddle <br />dam and is summarized in the Geotechnical Data Report, Bruce Park Dam (GEI, 2001). <br />GEI COItsllltantS, In C. ~ 9929201-0]-93 AOtlenom Geotechnical Getz Rpt <br />