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CONTINENTAL MATERIALS CORPORATION <br /> ii.A means to indicate the design gradient of the three different ditch types at specific locations, <br /> Response: Channel profiles of the cross-channel, north channel, and south channel have been included <br /> in Exhibit G to present the ditch gradients.The profiles have been labelled so that the channel segments <br /> and peak flow rates can be determined from the SEDCAD model and Table G-3. <br /> iii. A means to indicate which design peak flow from the SEDCAD model is used for each reach of the <br /> stormwater management system. <br /> Response: The design flows are listed in Table G-3, and the watershed delineations are shown on <br /> Exhibit G-1.The names of the watersheds are included in the SEDCAD model. <br /> iv. Culverts identified in Exhibit G (reference p. G-3, second paragraph). <br /> Response: There are no culverts associated with the reclamation drainage plan.The only culverts used <br /> at the site are for the operation/reclamation period, and these will be removed as the site is reclaimed. <br /> v. Location of the three French drains, noting elevations constructed after the approval of TR-18. <br /> Response: The Waldo Canyon fire destroyed 248 homes in the Mountain Shadows subdivision near the <br /> Pikeview Quarry, and as a service to the homeowners, CIVIC demolished and removed the foundations. <br /> Concrete rubble from the house foundations was imported to the quarry. Ash and debris were disposed <br /> of in the Colorado Springs Landfill, and rebar was recycled by Industrial Recycle.The concrete rubble <br /> was broken into 12-inch pieces and used to construct three French drains as shown on Exhibit G-1. Each <br /> drain was excavated to be 20 feet deep and 20 feet across. Elevations were approximately 7200 to 7210 <br /> and sloped to the east to allow drainage. <br /> e. Water Capture Structure Details:The interception of runoff above the slide area is critical in <br /> preventing stormwater from entering the slide area where it is likely to reduce stability. Please provide <br /> detail drawings demonstrating how the upgradient runoff will be intercepted and conveyed to the <br /> proposed diversion channels. <br /> Response: Runoff from upland areas, particularly the three drainages west of the quarry,will be <br /> intercepted by the cross-channel or south channel and routed north or south of the existing slide area. <br /> The terraces divert any precipitation off the slide area to the north or south.As shown on the maps in <br /> Exhibit C,the fill extends beyond the slide area, so water is routed off the slide and onto stable ground. <br /> f. Record Drawings:As stormwater control is potentially critical to the success of this reclamation plan, <br /> please commit to providing As-Constructed drawings within 60 days of the completion of all reclamation <br /> channel construction. <br /> Response: CIVIC will prepare As-Construction drawings of the reclamation plan as requested. <br /> Pikeview Quarry Amendment 4, Response to Adequacy <br /> February 7,2020 <br /> 9 <br />