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Lyons Quarry ��� <br /> 112d Reclamation Permit Operations <br /> Technical Revision <br /> re-grading of existing slopes to provide for long term slope stability. It is estimated that <br /> approximately two-thousand (2000 LF) of scour berm will need to be constructed. <br /> Item 7.0— Reclamation Areas and Soil Conditioning <br /> Reclamation areas have been differentiated by a slope analysis of the site as shown on Exhibit F- <br /> Reclamation Plan Map, Attachment C. Areas of 1.5H:1 V slopes will be too steep to effectively apply <br /> soil amendments and produce a vegetative cover; therefore the slope will be covered with a 2-foot <br /> thick layer of talus riprap (D = 8-12") and compacted using an excavator bucket. Approximately 4.8 <br /> acres will require talus riprap coverage. We anticipate that sufficient talus riprap can be generated <br /> from the massive sandstones onsite and will be selectively blasted and screened as needed to <br /> produce specified grading. <br /> Areas with a slope greater than 1.5H:1V will be reclaimed in a manner that allows for livestock <br /> grazing and movement along the slope face. These areas will be backfilled as described above then <br /> covered with a layer of growth medium material (i.e. topsoil, biosolids, compost). Topsoil will be <br /> developed from any available topsoil stockpiled on site and from the excavation and breakdown of <br /> the fine grained sedimentary overburden rock, then blended, scarified, seeded and mulched. This <br /> material will then be uniformly mixed, via rippers or the teeth of an excavator bucket, in to the top 12 <br /> inches of the subsoil. It is expected that the area to receive amendments covers approximately 39 <br /> acres. <br /> Item 8.0 —Sedimentation Pond Reclamation <br /> The sedimentation pond will be backfilled to blend with the surrounding topography, unless post- <br /> mining use dictates otherwise. Backfill requirements shall be the same as those stated in Item 6.0. <br /> Surface water shall be removed from the area prior to backfill activities. <br /> Item 9.0 - Revegetation <br /> This item assumes the seed mix to be used will be specified in cooperation with Boulder County <br /> Open Space. We assumed the affected lands will be reclaimed with the following mixes of grasses, <br /> shrubs, and trees: <br /> Western Wheatgrass, Little Bluestem, Green Needlegrass, Big Bluestem, Sideoats Grama, <br /> Rubber Rabbitbrush, and Mountain Mahogany. <br /> The seeding will be done from March -April 15. If any areas must be prepared in the summer, fall, or <br /> winter, then the topsoil will be mulched at that time and seeded the following spring. We have <br /> assumed that a minimum of 300 pounds (Ibs.) of available nitrogen and 50 lbs. of available <br /> phosphorous per acre will be supplied after seeding and not included with the seeding. A soil <br /> analysis will be made to more exactly determine the fertilizer needs. We have assumed that <br /> immediately following the seeding and fertilizing, the area will be lightly scarified and mulched with <br /> one of the following: <br /> a. Excelsior mats properly staked down <br /> b. Long-stemmed native prairie hay (4000 Ibs/acre) tied down with properly anchored jute <br /> netting. This will apply to areas where hydromulching is not feasible due to access limitations <br /> or slope configuration. <br /> c. Long-stemmed native prairie hay, (4000 Ibs/acre) and a tackifier emulsion (150 gal/acre) <br /> hydromulched. . Hydromulch will be applied to all slopes greater than 1.5H:1 V but less than <br /> June 2016 1 7 <br />