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.; .~ RECEIVED INSPECTION OF EXCESS SPOIL FILL Fill Area #7 First Quarter 2002 Certification February 23, 2002 JUL ~ 4 2002 IlitnSion of Minerals d Geology The CTL Thompson report dated April 27, 2001, "StabiliTy Analysis and Geotechnical Recommendations Lorencito Surface Mine Phase I" addresses the general requirements as also cited in Sections 4.09.1 to 4.09.2 of the Colorado Mined Land Reclamation Board for Coal Mining. ACTIVITIES NOTED DURING INSPECTION Removal of organic material and topsoil salvage; ongoing fill placement SEDIMENT CONTROL Sediment pond construction has been completed in accordance with plans submitted to and approved by the DMG and as-constructed survey/drawings certified by Registered Land Surveyor and Registered Professional Engineer. All surface run-off from the fill areas is directed [o this sediment control facility. SITE PREPARATION Organic materials such as brush and trees have been removed from the proposed fill area. Topsoil has been stripped from the area and stockpiled. No evidence of springs or seeps was observed during site preparation. DRAINAGE SYSTEM (UNDERDRAINS) Underdrain construction was completed in advance of fill placement. FILL PLACEMENT CDMG regulations require that spoil be "placed in horizontal lifts in a controlled manner, concurrently compacted as necessary to ensure mass stability". Maximum lift thicknesses are not specified. Lifts are being placed in accordance with plans specified by the CTL Thompson report. Spoil material is transported to the fill area using a combination of [rocks and dozers. Lift thicknesses varied but were not in excess of 50 feet in thickness. Spoil placement was in excess of 50 feet from the projected final fill face. COVER MATERIAL Final fill configuration has not been obtained and no cover material has been placed on the spoil material.