Laserfiche WebLink
CnK CONTINENTAL MATERIALS CORPORATION <br /> g. Stormwater diversion during reclamation: It will take some time to place sufficient fill to construct the <br /> upper area stormwater diversion channels. Please address how stormwater will be prevented from <br /> entering the slide area until the closure channels are constructed. <br /> Response: There are existing diversions that divert runoff from the northern drainages water off the <br /> slide area. Water from the southern drainage will be routed along the road and south of the slide area. <br /> This temporary diversion will be installed when reclamation grading commences. <br /> 34. Benched vs Backfilled Highwalls: Narratives and reclamation maps submitted to date do not make it <br /> clear as to how much, if any benched highwalls are proposed for final reclamation. Please provide <br /> additional figure(s) in Exhibit F depicting which areas will be backfilled to between 2H:1V and 2.25H:1V; <br /> and where benched highwalls are to be left. Also include any planned earthwork backfill depictions for <br /> benched highwalls (e.g., Exhibit C-3 "Close Up" in AM-03). <br /> Response: The requested map has been included in Exhibit F. <br /> 35. Revegetation Timing: Given the steeper proposed reclamation slope,timing of topsoil placement, <br /> grass seeding,tree planting and interim topsoil stabilization are important aspects of a successful <br /> revegetation program. Please address the following: <br /> a.Topsoil protection: How will topsoil be stabilized on the steep slopes until vegetation is established? <br /> Will a tackifier or other BMPs be used? <br /> Response: <br /> • We would like to retain the option of using an appropriate soil stabilizer tackifier such as <br /> Super Tack®, or another Best Management Practice, such as long or short fiber mulches, or <br /> some combination of practices. <br /> • Given the proposed final slopes, it may not be safe to apply soil tackifiers on steep slopes <br /> with a slope length which cannot be reached by application equipment. For bonding <br /> purposes, we recommend the application of Super Tack® (60-100 lbs./acre) be used in <br /> combination 2000 lbs. of wood fiber mulch per acre. <br /> • On steep slopes, other techniques may be used.These areas will likely be broadcast seeded. <br /> Proposed techniques include ripping and/or gouging the soil surface prior to broadcast <br /> seeding.These techniques may be done on the contour or up and down the slope.They will <br /> trap snowmelt and rain fall and retard runoff.The broadcast seed will be trapped in creases, <br /> cracks and depressions. <br /> b. Grass seeding: How will grasses be planted? Drill seed, hydroseed, broadcast. etc. (note the DRMS <br /> requires seed rates be doubled for any method other than drill seeding). <br /> Pikeview Quarry Amendment 4, Response to Adequacy <br /> February 7, 2020 <br /> 10 <br />