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Mr. Liesveld <br />Page 1 5 <br />February 17, 2011 <br />highwalls, waste piles and quarry rooms. Information for slope stability analyses may <br />include, but would not be limited to, slope angles and configurations, compaction and <br />density, physical characteristics of earthen materials, pore pressure information, slope height <br />and post-placement use of the site. The purpose of the engineering analysis is to demonstrate <br />the site will be stable after reclamation and suitable for residential development. The <br />minimum acceptable safety factors will be subject to approval by the Division, on a case-by- <br />case basis, depending upon the degree of certainty of soil or rock strength determinations <br />utilized in the stability analysis. <br />This concludes the Division's preliminary adequacy review of this application. Please remember <br />that the decision date for this application is March 10, 2011. As previously mentioned, if you are <br />unable to provide satisfactory responses to any inadequacies prior to this date, it will be your <br />responsibility to request an extension of time to allow for continued review of this <br />application. If there are still unresolved issues when the decision date arrives and no extension <br />has been requested, the application will be denied. <br />If you have any questions, please contact me at (303)866-3567 x8116. <br />Sincerely, <br />A I- <br />Michael A. Cunni gham <br />Environmental Protection Specialist