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rangeland C acreage in this bond release.) Trapper's bond release submittal refers to field data on <br />topsoil thicknesses that was collected by Trapper and verified by the Division. <br />IV. OBSERVATIONS AND FINDINGS <br />Reclamation History and Definition of Phase II Bond Release Parcels <br />Trapper's three SL-02 bond release blocks resuk from Trapper's reclamation of the lands that it <br />mined in its D-pit and H-pit in No Name drainage, and in its A-pit in Johnson drainage. The blocks <br />were regraded, retopsoiled, and seeded in 1984, 1993, 1994, 1995, and 1996. The blocks were drill- <br />seeded. Blocks aze designated by themine pit and pre-mining vegetative community: for example, <br />the reclaimed block in H-pit where pre-mining vegetation was rangesite B, is designated "H Pit <br />RSB". <br />Topsoil Thickness <br />Required thickness and replacement history. The permit application, page 3-82 of Volume 3, <br />requires that 12 inches of topsoil be replaced on all reclaimed lands designated as rangeland A, B <br />and C. The bond release parcels are rangeland A and B. Trapper replaced topsoil contemporaneously <br />with backfilling and grading operations, drawing from live-haul and stockpiled sources. All of the <br />parcels had phosphate fertilizer applied to the topsoil at a rate of 100 pounds per acre. One parcel <br />(D-A-84) also had similar phosphate fertilizer applied to the spoil before topsoil was applied. <br />Confirmation of topsoil thickness. Trapper and the Division confirmed topsoil thicknesses. <br />Trapper field sampled parcel D-A-84 and counted scraper loads for the other nine parcels. The <br />Division verified Trapper's load counts for four parcels by hand angering topsoil during the July <br />1996 inspection. The Division's measurements confirmed [hat Trapper's measurements reasonably <br />represented minimum topsoil thickness. During various regular monthly inspections, the Division <br />has observed in the field Trapper's topsoil laydown methods for achieving the required l2-inch <br />minimum. <br />Location of Trapper's presentation of topsoil data. The topsoil replacement history and the results <br />for mean topsoil thickness for each parcel are summarized in the SL-O1 application on Table 2.3-1, <br />page 2-I0. (A duplicate copy of these data are shown in Appendix 2.1 of the SL-O1 application.) <br />Location of Division's record of topsoil data. Appendix 2.3 of the SL-O1 bond release submittal <br />presents the topsoil thickness measurement data that the Division obtained, and which are recorded <br />in the Division's inspection report dated July 15, 1996. In addition, the Division's inspection report <br />of June 21, 1990 contains field measurements of topsoil thicknesses on D- pit reclamation. Finally, <br />various Division inspection reports contain observations of Trapper's topsoiling techniques. <br />Trapper Mine <br />Phase II Bond Release Page 5 12/23/99 <br />