2003-02-12_REVISION - M1999034 (2)

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COOLEY RESERVOIR AND FULTON WILDLIFE AREA PIT AMENDMENT NO. 1 - JERONIMUS PROPERTY E%HIBIT D -MINING PLAN (Continued) Topsoil and overburden excavation and stockpiling. For areas that are disturbed, I' of topsoil shall be stripped and stored for later revegetation activities. Topsoil and overburden stockpiles for use in final reclamation activities will be placed in the northeast and southeast corners of the site out of the 100 year floodplain. Temporary topsoil and overburden stockpiles that are placed in the 100 year floodplain area shall be a maximum of 20' in heieht and 100' in width with 100' gaps between 300' long piles, be placed parallel to the S. Platte River's overflow direction, and have a maximum slope of 1 H:1 V. A Floodplain Use Permit from Adams County shall be Adams County for all operations within the floodplain. All topsail and overburden stockpiles that are expected to remain undisturbed for longer than one growing season shall be drilled seeded with Crested Wheatgrass (Emphraim Variety) at a rate of 5 lbs/acre (Cooley Reservoir Mix A from NRCS 01/28/03 letter) to minimize wind and precipitation erosion. For broadcast seeding, this rate shall be doubled. Based on a maximum reclamation need of 10 acres ofnon-wetlands area for revegetation activities, the amount of topsoil stockpiled could be 16,000+_ cubic yards stored in southeast and northeast corners of the site. Any tall grass areas adjacent to existing wetlands that are disturbed shall be revegetated by drill seeded with Tall wheatgrass (Jose Variety) at a rate of 1 1.0 lbs/acre (Cooley Reservoir Mix C from NRCS 01/28/03 letter). Temporary stockpiling of excavated material, particularly any material from below the water table, to allow the draining of water from the material, prior to conveyance to the Plant Site for processing or off-site for use as borrow material. 10. If demand warrants, direct hauling of borrow material, and unprocessed aggregate material for use as borrow material, from the entrance onto Brighton Road, subject to the requirement that haul trucks shall cover their loads and appropriate temporary traffic control measures as determined by the Adams County Department of Public Works. 11. The filling of lake areas with silt from the wash plant water, backfilling of excavated and stored overburden, recovering disturbed areas with stored topsoil, grading, and planting. Storm water from temporary roads and other disturbed areas will be managed by grading to direct storm water from disturbed areas into the existing lake areas and be contained on site. The existing Storm Water Management Plan (S WMP) and Permit is will be modified to reflect the addition of this property. The Spill Prevention Control Plan for the existing site shall also be followed. A copy of Discharge Permit Approval Letter and the SPCC Plan are included as pages 6 and 7 of this exhibit.