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TRAPPER MINING INC. SAND AND GRAVEL SITE C~ Exhibit E Contd. - Page 3 ities will be in a broad, flat flood plain. All drainage from disturbed areas will be into the mined out pit or through a sump or sediment trap to the Yampa River. 2.2 Topsoil Salvage and Replacement Sufficient topsoil shall be removed to replace an average depth of between 16 and 19 inches on reclaimed surfaces. All topsoil stripped from the area to be disturbed will be placed in stockpiles. Possible locations of topsoil stockpiles are shown on Exhibit C. However, actual locations and numbers of stockpiles may vary. Topsoil stockpiles will be graded to slope no greater than lv:3h. Seeding of topsoil stockpiles will occur in the fall. Excess overburden may need to be removed and stockpiled. These piles will also be seeded in a manner similar to topsoil stockpiles. However, these piles won't be marked. Seeding overburden stockpiles will help lower fugitive dust emissions. Topsoil replacement will occur once all regrading of the area disturbed by mining is complete. No mechanical treatment of the overburden to prevent • slippage and promote stability is necessary. With the exception of the pond embankments, the reclaimed area is basically Level. Appropriate soil fertility tests will be performed on all replaced top- soiled areas. Based on these tests and the plant species seeded, amend- ments will be applied. In order to promote species diversity and enhance wildlife habitat, a variable depth of topsoil is proposed. In no even[ will topsoil depths be less than 10 inches. However, if suitable material exists, depths up [o 24 inches may occur at random across the topsoil replacement area. The average depth of topsoil will be between 16 and 19 inches. 2.3 Revegetation Once topsoil replacement is complete, appropriate seedbed preparation will be used to prepare the replaced topsil Eor seeding. These practices may include discing, fertilizing, dragging, harrowing, roller packing, etc. Once a suitable seedbed is prepared, the replaced topsoil will be seeded in the fall to an appropriate mix of perennial plant species. A concep- tual example of a mix is shown in Table E-1. No mulching of the site is proposed due to the lack of erodible slopes. • Contd.