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May 11, 2011 Page 10 <br />below. In both situations, ground and aquifer contamination may be caused due to seepage of <br />water from the disposal pit. <br />4.6 4 Surface Water Disposal Pit Damage Mitigation Plan <br />In case monitoring indicates onset of damage or potential for damage to the water <br />disposal pits, the following mitigation plan should be adopted. <br />• Appropriate personnel at mine and regulatory authorities, as well as the owner(s) of the <br />water disposal pit, should be informed in case anomalies are observed that may indicate <br />an affected pit. <br />• The mining plan should be re- evaluated to ensure that operations will not further damage <br />the water disposal pit in question. <br />4.7 Solar Panels /Scada Antennas <br />4.7.1 Solar Panels /Scada Antennas Subsidence Control Plan <br />Solar panels and Scada tower /antennas were classified as transmission towers that are <br />less than 50 in (164 ft) tall. This is a very conservative assumption. It is anticipated that these <br />structures can be undermined using development -only workings without impacting them. Given <br />the anticipated range of cover depths and width of entries and crosscuts, it is highly unlikely that <br />any perceptible surface deformation will occur. However, surface owner(s) should be notified <br />prior to commencement of room and pillar operations under these installations. <br />4.7.2 Solar Panels /Scada Antennas Monitoring Plan <br />plan: <br />To ensure that the control plan is effective, AAI recommends the following monitoring <br />• The solar panel and Scada tower owner(s) should be informed as mining approaches. <br />• Due to the low probability of perceptible surface deformation, no direct monitoring is <br />required. Structural anomalies reported by the surface owner(s) will be investigated. <br />4.7.3 Worst Possible Consequences of Damage to Solar Panels /Scada Antennas <br />Any damage to these structures would likely involve disruption of power, and/or <br />communication. <br />4.7.4 Solar Panels /Scada Antennas Damage Mitigation Plan <br />In case indications of damage or potential for damage are detected, the following <br />mitigation plan should be adopted. <br />• Appropriate personnel at mine and regulatory authorities should be informed. <br />Agapito Associates, Inc. <br />