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13 stockpiles shall be broadcast seeded at double the drill- applied rate for vegetative erosion control. Following topsoil removal, stockpiling, and erosion proofing Unit I shall be stripped of the remaining overburden, estimated to average 3 feet, by dozing it into two separate r berms just outside of the north and south borders of Unit I. 1 ~, ------ ~ /~ ~ ~ ~~ topsoil /RO 9 ~ I LlD71z II ~ ~~ . i /~~~ T~' 1 ~ t` ~ i i ~ ~ u ~ PROC ~~~ `b overburden / /~ ~ I j UNifl' 1 STOCK ~ overburden ~~ s.w.. ~ ~ ~ / coy. ~ i , ~ r-- -T--a .~ Extraction and simultaneous processing of Unit I gravel deposits shall commence at the east edge of Unit I and proceed west at the grade-level full 8- to 12-foot depths and the full 150-foot width of the deposited resources to the west edge of Unit I. Gravel deposits are underlain. by decomposed silty claystones and fine-grained sandstones of the Dakota sandstone formation. Processing operations of crushing and screening shall occur in the above described Proc/Stock area immediately east of mining Units I S II. A wheeled front-loader shall extract the gravel resource from the Unit I pit and load it into the feeder for the primary crusher or screen plant. Belted conveyors shall move the product between equipment units and to the belted radial stacker for stockpiling. Occasionally a wheeled front-loader shall be used to move products around the site. Sand and gravel products stockpiled at the site shall be truck hauled to area markets from the site via the existing on-site access road to Montezuma County Road 21, and beyond. When Unit I mining area extraction is nearing completion at the northwest corner, overburden backfilling into the excavated south edge of the pit may begin by dozing the stockpiled overburden over the south edge. A stable 3- Horizontal to 1-Vertical (3H 1V) slope shall be graded into the south edge headwall, using overburden as fill material, as backfilling proceeds to the west. When Unit I