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Premining Vegetation <br />Two vegetation types will be affected by the scraper mining operation. <br />These are the mixed brush type and the aspen type (identified as the aspen <br />subtype of the mixed brush type). Tab 10, Vegetation study of the Seneca <br />Mine permit discusses premining vegetation types in detail. Worst case <br />disturbance acrezoes are 9.0 acres for the aspen type and 21.2 acres for <br />the mixed brush type. These acreages relate only to disturbances for <br />stockpile BB, the actual scraper mining disturbance and the temporary <br />diversion. It should be noted that these acreages were to be affected by <br />the normal mining advance as detailed on Exhibit 12-1 "Operations Plan" <br />contained in the Seneca Permit Renewal document. The scraper mining will <br />result in disturbance of the areas annotated on the attached er,hibits <br />earlier than originally anticipated. <br />REVEGETATION PLAN <br />Temporary Reclamation. The previously described mining operations will <br />• result in three areas of temporary reclamation. These areas include <br />stabilization of topsoil stockpile BB, seeding of the temporary diversion <br />ditch, and temporary reclamation of approximately 8.2 acres of rough <br />graded spoils in the southern portion of the mining area. <br />As noted in the topsoil salvage and handling discussion, salvaged topsoil <br />will be placed in stockpile BB. As backfillina and grading operations <br />progress, a portion of the salvaged topsoil will be taken from stockpile <br />BB and respread on the areas that have been final graded. Because <br />redisturbance of this stockpile will occur in a relatively short time <br />after establishment, seeding of Seed Mix No. 3 (Topsoil Stockpile hlix) <br />will not be done. A small catchment ditch will be constructed around the <br />stockpile to control runoff and sediment. If the topsoil stockpile BB is <br />to receive further disturbance within a year, only a cover crop of wheat <br />or barley as specified in Seed Mix No. 4 will be applied. If the <br />stockpile is to remain undisturbed for longer than a year, Seed Idix No. 3 <br />• will be applied. <br />5 02/13/87 <br />