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<br />Trapper Mine Gravel Pit - Addendum to Exhibit D and E <br />1.0 Size of Pond <br />acres. <br />After mining and reclamation activities, the pond will be approximately 4 <br />2.0 Soils <br />The limited impact permit area is mapped by the Soil Conservation Service <br />as an AW-Cumulic Haplaquolls, flooded. These are deep, poorly drained soils <br />that are formed in alluvium and are on first river, stream terraces and flood- <br />plains at elevations of 6000 to 7000 feet. Included in this mapping unit are a <br />few small areas of Homelake soils. Typically, the surface layer is a dark brown <br />loam about 10 inches thick. The subsoil material is stratified sandy loams, <br />silt loams, silty clay loams, clays and sands to 60 inches or more. In some <br />areas, sand and gravel may be present at the surface. Surface runoff is slow <br />and erosion hazard is slight Erom wind and water. The water table is at about <br />10 inches for most of the area but does occur close to the surface in a few <br />small localities. <br />All strippable topsoil (i.e., that topsoil that can be salvaged by <br />scrapers and is composed of all A horizons and those B horizons that do not have <br />a high clay or sand content) will be salvaged prior to distrubance. The topsoil <br />depths range Erom 0" to 12" with a x of 7.2". This equates to about 9,680 cubic <br />yards of topsoil available for the 9.99-acre permit area. <br />Since the pond, after mining and reclamation, is expected to be 4 acres in <br />size, we will be able to replace approximately 12" of topsoil on the remaining <br />5.99 acres. <br />3.0 Wildlife Impact Statement <br />See attached letter from wildliFe biologist, Larry Henderson, Trapper <br />Mining Inc. <br />4.0 Pond Islands and Irregularities <br />The mining plan is limited to 4 acres of actual digging area. In order to <br />extract as much gravel as possible from the 4 acres, pond irregularity would be <br />difficult to achieve. The only way to achieve such a goal would be to sacrifice <br />some of the gravel or actual mining area available. Since it is highly prob- <br />able we will not have enough gravel from the area to fulfill our current needs, <br />this request is not acceptable. We will, however, if sufficient overburden <br />exists, create small islands within the pond and shape the pond after mining so <br />that it looks as natural as possible. <br />