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• YOAST MINE <br />2007 ANNUAL RECLAMATION REPORT <br />2007 DISTURBANCE AREA <br />There was an additional 1.5 acres disturbed during 2007 to accommodate backfilling and grading <br />activities along with topsoil replacement.. The total disturbed area has been revised to 848.6 acres. <br />This acreage change is reflected on the CDRMS Annual Report Form and is included in the text of <br />the following report. The attached 2007 reclamation maps portray the revised disturbance <br />boundaries. <br />BACKFILLING AND GRADING <br />During 2007, SCC backfilled and graded 146.3 acres as shown on the 2007 Graded Areas map. <br />TOPSOIL AND SPOIL MONITORING <br />SCC is required by Permit C-94-082 to monitor the salvage, storage, and redistribution of topsoil and <br />spoil handling operations at Yoast Mine. Specific programs include documenting topsoil recovery, <br />verifying soil redistribution thickness, determining final graded spoil suitability, deternning topsoil <br />fertility, evaluating plant rooting characteristics, recording the source of replaced topsoil, and <br />completing an annual topsoil balance. The following sections present the topsoil and spoil monitoring <br />data for the 2007 calendar year. The results of topsoil/spoil monitoring for 2007 are included in the <br />• attached 2007 Soils Report. <br />• Topsoil Recovery Documentation <br />Topsoil was live handled on the 1.5 acres disturbed during 2007. <br />• 2007 Topsoil Replacement Thickness <br />SCC is required, by Permit C-94-082 and Section 4.06.4(2)(b) of Colorado's Regulations for Coal <br />Mining, to document and record the topsoil replacement thickness for each reclamation block using a <br />minimum sampling intensity of one hole per five acres. The topsoil replacement thickness <br />information is used to adjust future topsoil replacement projections, if necessary, and for bond release <br />purposes. Topsoil replacement depths were determined during the 2007 field season based on <br />sampling on a 500 ft. grid within the topsoil replacement area. The average topsoil replacement depth <br />for the 2007 replacement area was 17.8 inches. See the 2007 Soil Samples map and Table 07.6, Yoast <br />Topsoil Depth Samples for further documentation <br />• Soil Pit -Topsoil Fertility and Spoil Suitability <br />Two deep backhoe pits were excavated at randomly selected geographically distributed sites. A total <br />of ten (10) samples were collected from the two pits. The sampling included the reapplied topsoil to <br />the underlying spoil contact as well as the underlying spoil to depth of at least 60 inches. All reapplied <br />topsoil samples and underlying spoil samples have "good-rated" suitable quality material. <br />The sampling and suitability evaluation was conducted by James Nyenhuis, Certified Professional Soil <br />• Scientist. The 2007 Soils Report is attached and provides the detailed write-up, analytical data, and <br />sampling locations from the 2007 sampling effort. <br />