Laserfiche WebLink
Lyons Quarry ��� <br /> 112d Reclamation Permit Operations <br /> Technical Revision <br /> to the fill slopes. Any remaining prospect pits, drill or auger holes or portal openings will be closed <br /> according to DRMS regulations. <br /> Reclamation areas have been developed based on a site slope analysis. Areas of 1.5H:1 V slope <br /> will be too steep to effectively apply soil amendments and produce a vegetative cover; therefore the <br /> slope will be covered with a 2-foot thick layer of talus riprap (D = 8-12") and compacted using an <br /> excavator bucket. Areas of 2H:1 V slopes will be reclaimed in a manner that allows for livestock <br /> grazing and movement along the slope. These areas will be backfilled and compacted as described <br /> above then covered with a layer of growth medium material (i.e. onsite topsoil, biosolids, or <br /> compost). Native plant shrubs, wetland plugs, willow staking or trees will also be incorporated in to <br /> the reclamation plan as necessary. Areas of revegetation will be watered periodically for at least the <br /> first growing season (April — October) and mowed and/or sprayed to control weed infestation. <br /> Immediately adjacent to the site perimeters on the south, east and west, upland runoff control <br /> drainage channels will be installed. Approximately three thousand five-hundred linear feet (3500 LF) <br /> of berm/ditch will be required as shown on the Site Grading Plan, Attachment B. The berm/ditch <br /> alignment will be established as grading of the Quarry Excavation Area filling nears completion. The <br /> V-shaped berm/ditch footprint shall be cleared and grubbed, cut and filled using native soils on the <br /> slope above the quarry and supplemented with materials from the borrow areas. The berm/ditch will <br /> be lined with geotextile extending from the outside edge of the berm through the ditch and up the <br /> slope opposite the berm. Geotextile will be installed in accordance with manufacturer guidelines with <br /> particular attention to anchoring and overlap requirements. The geotextile liner will be completely <br /> covered by a layer of 12" riprap. Sufficient riprap should be available onsite, but screening will be <br /> required to produce specified grading. Riprap may also be hauled in if necessary. <br /> The existing sedimentation pond will be utilized for dust control during site grading and backfilled <br /> (approximately 1,900 cubic yards) at the end of construction to blend with the surrounding <br /> topography, unless post-mining use dictates otherwise. The final contours will be graded toward <br /> South St. Wain Creek. <br /> June 2016 1 4 <br />