2003-06-16_REVISION - M1999034 - Laserfiche WebLink

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COOLEY RESERVOII2 AND FULTON WILDLIFE AREA PIT AMENDMENT NO. 1 - JERONIMUS PROPERTY (Revised 06/03) EXHIBIT D -MINING PLAN (Continued) Installation of a conveyor and wash pipe crossings of the Fulton Ditch for conveyance o£ excavated material and pipe to bring fresh water to and silt wash from the existing Plant Site. These two crossing points are already disturbed with existing piping and private drives across the Ditch, that the Ditch company utilizes. No new disturbance will be caused by use of these two crossing points, and these two crossing points will remain after mining is completed, therefore these two crossing areas are not and need not be included in the permit area. 4. Topsoil and overburden excavation and stockpiling. When any dryland areas that are mined, 1' 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 flood plain. No stockpiles will be located within 200' of 104°i Avenue. Temporary topsoil and overburden stockpiles that are placed in the 100 year flood plain area shall be a maximum of 20' in height 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 1H:1 V. A Flood Plain Use Permit from Adams County shall be obtained for all operations within the flood plain. 5. Installation of temporary conveyors and temporary internal roadways as needed. 6. Topsoil and overburden stockpiles that are expected to remain undisturbed for less than one year may remain at a maximum slope of 1H:1V, and need not be vegetated. Stockpiles expected to remain longer than one year shall be sloped to a maximum slope of 3H:1 V, and then be revegetated with non-irrigated grasses per the Cooley Reservoir Mix A from NRCS 01/28/03 letter as copied as page 7 of this EXHIBIT to minimize wind and precipitation erosion. For broadcast seeding, this rate shall be doubled. Based on a maximum reclamation need of 10 acres of disturbance to non-wetlands area for revegetation activities, the amount of topsoil stockpiled could be 16,000± cubic yards stored in southeast and northeast comers of the site. Any areas adjacent to existing wetlands that are disturbed shall be revegetated with non- irrigated grasses per the Cooley Reservoir Mix C from NRCS 01/28/03 letter as copied as page 8 of this EXHIBIT. 8. 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.