Laserfiche WebLink
Monitoring or Water-Supply Well Completion -CCR anticipates coverting drillholes CCU013, <br />CCU014, CCU021 and CCU025 into groundwater monitor wells. These drillholes will be completed <br />as underburden monitor wells (e.g., will be used to monitor groundwater in the stratigraphic unit <br />below the Wadge coal seam). In addition to these underburden monitor wells, a hole will be drilled <br />and a well completed at each exploration site (CCU013, CCU014, CCU021 and CCU025) to monitor <br />groundwater in the Wadge coal and overburden units. The drillholes and monitor wells are <br />designated as "a" and "b" for the Wadge coal and overburden monitor wells, respectively (e.g., <br />CCU013a and CCU013b; see Table 2). In compliance with applicable provisions of 43CFR <br />3484.1(a) and 37-92-602, C.R.S, prior to conversion of an exploration drillhole to a monitor well, <br />authorization will be obtained from the appropriate regulatory authority(s). <br />Monitor well permit applications have been submitted to Colorado Department of Water Resources <br />(CDWR). Per Rule 5.2.31 (2 CCR 402-2), a temporary drillhole can be converted into a monitoring <br />or observation well within one year of being drilled after proper notice of intent is given CDWR. The <br />well permit applications constitute proper notice of intent; consequently, CDWR permit issuance is <br />not needed prior to initiating the exploration activities. <br />Monitor wells will be constructed in accordance with the Water Well Construction Rules (2 CCR <br />402-2). In general, monitor well construction will involve placement of steel surface casing, casing <br />the open drill hole with solid steel pipe (0.188-inch minimum wall thickness), placing perforated-slot <br />screen and 8/12 silica sand or apre-packed, stainless steel or PVC well screen in the desired <br />completion interval, establishing bentonitic plugs above and below the screened interval and grouting <br />the well annulus to prohibit vertical migration and cross-contamination of aquifers. Following <br />construction, the monitor well will be developed by successively flushing and pumping the well bore <br />to remove drilling fluids, drill cutting and other materials introduced into the borehole during the <br />drilling process. Figure 2, Typical Monitoring Well Completion, illustrates typical completion <br />methods. <br />In accordance with Rule 14.2.6 (2 CCR 402-2), a well completion report (Form GWS-31) will be <br />submitted to CDWR within 60 days of completing the well. Once the well is no longer needed, it <br />will be plugged and sealed in accordance with the appropriate rules and regulations (Rule 16, 2 CCR <br />402-2). If CCR permits the Cow Camp project as an underground mine under Regulations of the <br />Mined Land Reclamation Board for Coal Mining, all relevant well permit and completion forms will <br />be included as part of the permit application package. <br />Proposed Reclamation Methods: The proposed exploration program is designed to minimize new <br />surface disturbance by utilizing existing roads and trails to the extent possible, placing drill pads <br />adjacent to existing roads, utilizing previously disturbed areas for drill pads, and limiting pad size. <br />Surface disturbance, and reclamation requirements and costs calculated by CCR are summarized on <br />Table 3, 2008 Exploration Program Reclamation Cost Estimate. <br />Upon approval of the NOI, CCR will file a corporate surety with the Land Mined Reclamation Board <br />to ensure that the reclamation obligations are fulfilled. If CDRMS completes an independent bond <br />calculation estimate as part of the NOI review CCR may choose to file a corporate surety for the least <br />cost estimate. <br />The following sections describe the specific proposed reclamation practices to be used to return areas <br />disturbed by the exploration activities to a stable condition and productive use. <br />Drill Hole or Well Plu~~ing= Sealing and Abandonment: All drillholes will be plugged, sealed, and <br />abandoned unless they are converted into a groundwater monitor well. Deeper drillholes will be <br />plugged with a minimum of 6 cubic yards (about 750 feet) of cement slurry -this is the off-road <br />Cow Camp Project - 200R N01 <br />a/l5/08 12 <br />