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Soil Stability Reclamation Staff has requested a discussion of overburden placement, including information regarding the nature of the backfill materials and the stability of the backfill slopes. The soil properties report addresses the steadiness of backfilled slopes. Ron Heinzen, Regional Manager of Kleinfelder, Inc., has indicated an expectation for both permanence and equilibrium. At the December 3 meeting, he strongly indicated his confidence in the soundness of the proposed terraced mining and reclamation slopes of 0.75:1 and 2:1, respectively. (The width of the terrace benches will range from 12 to 20 feet.) The attached soil stability report indicates that blow-out is not a factor since overburden that could possibly slough is scheduled to be removed. If Kleinfelder determines a need for periodic scrutiny of the back-filling process, Teichert will comply. As was mentioned in Teichert's application, overburden will be progressively removed ahead of mining and placed behind in depleted areas. Clay lens deposits, which vary in depth, and other unusable material will comprise the initial material used to reclaim. Corral Hollow deposits average an unusable material factor of 30% to 40% due to interbedded clays. Water spraying trucks will be available to ensure the reduction of dust at all stages of the mining and reclamation process. Topsoil will be bermed within the 25-foot setback encompassing the perimeter of the site, except along the northern boundary. This material is to be broadcast seeded with an erosion control mixture. (Please note that berming will not occud adjacent to Triple E's property--see revised site plan map.) If different or unusual soil conditions, such as perched groundwater, poorly cemented gravel or sand layers, etc., are exposed in the excavation process, Teichert will contact Kleinfelder to evaluate the impact on slope stability. If so 3