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The soils handling plans for Zones 1, 2, and 3 were revised to require the placement of two <br />separate lifts of topsoil/subsoil during reclamation under permit revision TR -57 approved in <br />March 2009. For Zones 1, 2 and 3 these revised plans authorized the placement of 22 inches of <br />soil (mixed A/B horizon materials) over 26 inches of suitable overburden (Bench 1 material). <br />As authorized with the states approval of the PR -6 permit revision application in November of <br />2010; <br />• Zone 1 (7.8 aces) is to receive 21 inches of soil [mixed A/B horizon materials; see <br />section 2.05.4(2)(d) -28] over 33 inches of Bench 1 overburden material (defined as <br />suitable in the permit) left over from the pre -2008 mining of the Morgan property; <br />• Zone 2 (12.2) is to have the same soil replacement requirements as Zone 1; <br />• Zone 3 (31.7 acres) is to receive 21 inches of mixed A/B horizon soils over 33 inches of <br />a layer of materials identified as `lift B' in the permit that consists of approximately a <br />50/50 mix of B/C horizon materials salvaged from the prime farmland acreage to be <br />disturbed after the February 2008 time period; <br />• Zone 4 (54.3 acres), being the only zone disturbed after February 2008, is to receive 24 <br />inches of a layer of material identified in the permit as `lift A' (consisting of <br />approximately a 30/70 mix of A/B horizon soils) over 33 inches of `lift B' soil that <br />consists of approximately a 50/50 mix of B horizon and C horizon materials salvaged on <br />lands mined after February 2008. <br />Although the content and portions of the B lift' materials to be placed in Zones 3 and 4 are not <br />clearly articulated in the permit, through OSM's review of the salvage depths and volumes <br />discussed in the text, along with the Order 1 Soil Survey descriptive data available, the <br />proportional mixing of the B and C horizon materials has been determined to be about 50/50 (see <br />discussion below). <br />On page 2.05.4(2) (d) -31 of the permit it is stated that topsoil volumes are calculated from pre - <br />mine sample points. OSM has used the information provided in the permit for determining the <br />mass balance of topdressing soil resources. <br />Pre February 2008 <br />According to the permit, at a soil recovery depth of 43.4 inches (at 93% recovery), 301,775 cubic <br />yards of material was available for redistribution on the 51.7 acres that was disturbed prior to <br />February 2008. As discussed above, up until February 2008, the permit permitted an average <br />salvage depth of 22 inches (as a singular mixed A/B lift) of this 43.4 inch layer of A and B <br />horizon material. This was due to the State having made an erroneous decision that no prime <br />farmlands existed on the Morgan property when initially permitting the mine in 2000. This error <br />was discovered in February 2008. According to the permit page 2.05.4(2)(d) -30] there is <br />currently 160,177 cubic yards of A/B mixed soil horizon material remaining in stockpiles from <br />7 <br />