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' Transit Mix Concrete Co. <br /> RESPONSES TO SECOND ADEQUACY REVIEW - EXHIBIT G, <br /> WATER INFORMATION (AUGUST 30, 2016) ON HITCH RACK <br /> RANCH QUARRY PERMIT APPLICATION M-2016-010 <br /> DRMS COMMENTS-TIM CAZIER <br /> 1) Comment: Page G-3,paragraph a,Little Turkey Creek. Figure G-5 provides the requested <br /> cross-section demonstrating the horizontal and vertical mining offsets, but does not <br /> indicate positive drainage will be promoted for either the North Pit Area or the Plant <br /> Area/South Pit. The North Pit contours show positive drainage from the northwest towards <br /> the southeast, but the southeast portion of the North Pit appears to be contained by an <br /> unmined "block" ranging in height from 20 to possible 80 feet. This is also apparent in <br /> Figure F-2 for the reclamation plan. A similar,but less prominent blockage may be present <br /> in the Plant Area/South Pit, as shown in cross-section A-A' on Figure G-5 where it shows <br /> an approximately five-foot rise near Little Turkey Creek that might prevent positive <br /> drainage at closure if the rise persists along the creek and until after reclamation is <br /> complete. Please provide additional discussion and figures demonstrating how positive <br /> drainage will be maintained during operations and after reclamation. <br /> Response: The stormwater drainage network will maintain positive drainage during <br /> the operational and reclamation periods. During the operational period, runoff from <br /> mine areas will flow through sediment detention basins before being discharged though <br /> an outlet culvert to Little Turkey Creek or Deadman Creek. During the reclamation <br /> period, runoff will flow down ditches directly into Little Turkey Creek or Deadman <br /> Creek. Where the mining has left a pitwall/block/rise at the ditch outlet, a notch will <br /> be excavated through the pitwall to provide positive drainage. These will be <br /> constructed during reclamation and are shown on Figures C-12,F-1,F-2,and G-12. <br /> 2) Comment: Page G-9 [now p. G-101, paragraph b, Deadman Creek. The response is <br /> adequate. <br /> Response: No further response is necessary. <br /> 3) Comment: Page G-9 [now p. G-10], paragraph c, Drainage Discussion. The response is <br /> adequate. <br /> Response: No further response is necessary. <br /> 4) Comment: Page G-11 [now p. G-12], 100-year,24-hour storm. The response commits to <br /> designing stormwater structures using the 100-year,24-hour storm event as required by the <br /> Division, but continues to defer to El Paso County rules and regulations regarding <br /> precipitation data, which may be outdated. As explained below,the Division requires the <br /> application acknowledge and utilize current references for precipitation data. <br /> Hitch Rack Ranch Quarry Permit Application M-2016-010 <br /> September 15, 2016 4 <br />