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Section 5 of the report will provide brief explanations and illustrations of potential dam failure <br />modes, and discuss how these failure modes may develop and their likely triggers. It is <br />important that the dam operators understand potential failure modes in order to focus their <br />attention on key areas for visual monitoring and to ensure vigilance in evaluating critical <br />instrumentation data. Potential failure modes will consider likelihood and consequences of <br />failures associated with natural events such as major storms and earthquakes, and operational <br />factors such as pond water -level management and structural maintenance. <br />Section 6 of the Detailed Inspection Report will summarize the overall evaluation of the tailing <br />dam structural condition and operational adequacy. Recommendations will be made for <br />maintenance, repairs and alterations of the facility to address deficiencies or improve dam safety. <br />If there are missing or inadequate data or analyses needed to fully assess dam safety, these will <br />be listed, along with specific recommended actions for filling in data gaps or conducting <br />additional engineering analyses. For example, supplemental investigations may be <br />recommended to obtain data such as surveys, drilling and sampling, laboratory testing, <br />installation of instrumentation, hydrologic studies, geotechnical and other engineering analysis. <br />If needed, a specific plan for additional data gathering, engineering analysis, and instrumentation <br />and monitoring will be provided, including a proposed schedule for these activities. <br />San Luis Project <br />Tailing Dam Safety Inspection and Reporting Program <br />Page 4 of 10 <br />