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G-2 <br /> containing water, but the transmission rate is so poor that it cannot be considered a water source. <br /> Clay and shale are typical aquicludes". <br /> Presence of Wetland Features <br /> As depicted on USGS topographic and other mapping(refer specifically to the Tampa, Colorado 7.50 <br /> Quadrangle; 1950; Photorevised 1978), there is a named intermittent "drainage" (so-identified as <br /> "Ennis Draw")present within the central portion of the Permit Area. CSC has established a"Temporary <br /> Mining Deferral Zone"along this south to north corridor that extends a lateral distance of 300-8.either <br /> side of the map-depicted centerline of the "draw" and/or exterior to field-delineated wetland features <br /> associated therewith. CSC notes that the Ennis Draw feature has been field-examined by the US Army <br /> Corps of Engineers(USACE),and the agency has determined the feature(and its associated wetlands) <br /> to be of a "non jurisdictional" nature; that is, the Ennis Draw feature does not constitute nor is it <br /> tributary to "waters of the United States" (see Attachment Gl: Approved Jurisdictional <br /> Determination—Keenesburg Project). <br /> In addition to securing the USACE "non jurisdictional" status determination, CSC has set aside the <br /> 600-ft. wide corridor (as a Temporary Mining Deferral Zone) and completed baseline wetland <br /> delineation efforts within the corridor to more fully delineate the presence and extent of the wetland <br /> features. This has been done as a first step in the determination of the overall mineability of the zone, <br /> and CSC will be further evaluating the zone to identify potential constraints that may impact its <br /> mineability. Such constraints may include the presence of seasonal or permanent zones of saturation <br /> (potentially introducing equipment operating concerns), wide or localized areas, or vertical horizons <br /> of high silty or clayey sand content(potentially introducing sand quality concerns),or a general thinning <br /> of the sand thickness(potentially rendering the area non-economic from a mining perspective),etc. <br /> As incremental data and/or information is gained within the zone, CSC will continue to evaluate its <br /> potential mineability, in whole or part. If mining is determined to be technically feasible and <br /> economically viable, CSC anticipates potential inclusion of all or part(s) of the zone into the life-of- <br /> mine plan, in which case any changes to the anticipated pit progression would be addressed via <br /> Technical Revision(prior to initiating mining within the zone). <br /> The baseline wetland delineation effort (conducted by qualified wetland biologists) identified the <br /> presence of twenty-five(25)discrete wetland features within the corridor. (RETTEW;2019). Wetland <br /> Keenesburg No. 2 Mine-112 Reclamation Operation—November 22, 2019 <br />