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. ~ <br />Memo to Boulay & Berry <br />Bear III Landslide <br />page 6 <br />length of time. I do not believe that the steep wedge of clay-rich colluvium cou{d have remained <br />stable for any appreciable length of time, in contrast to local occurrences of severe landsliding, <br />while a significant inflow of groundwater was occurring from the adjacent bedrock coal seam <br />subcrop. These observations lead me to conclude that some recent changed condition in the local <br />groundwater regime has caused groundwater to begin discharging beneath this steep colluvial <br />slope, causing the landslide. <br />Further, it is my opinion that the geothermal groundwater discharge referred to by W WE as the <br />"Edwazds Portal spring" is an expression of the same warm groundwater seepage evident within <br />the eastern half of the extensional head scarp trough, directly up slope from the spring. Previous <br />investigators did not observe these warm vapors and seep azeas in the scarp trough directly up <br />slope from the spring, so there was no evidence then to link the spring with a potential <br />groundwater source at the base of the slide. <br />cc: Mike Long <br />Susan McCannon <br />Harry Posey <br />Jim Burnell <br />doc: M:\Coal\JAP\beaz3sld.wpd <br />jP/JP <br />