Laserfiche WebLink
• <br /> i When any drill hole or production well is no longer needed, a Sundry Notice (Form 3160A) <br /> will be submitted to the U.S. Bureau of Land Management. The Notice will outline the <br /> protocol for plugging and abandoning the drill hole. <br /> Well plugging and abandonment is expected to include removing the inner production tubing <br /> and the placement of a cast iron bridge plug at the top of the fluid filled production cavity. <br /> Cement then will be used to fill the casing from the top of the bridge plug to the top of the <br /> Mahogany zone approximately 800 feet or at the same height as the annular cement of the <br /> casing. Then, 9 ppg mud will be used to fill the inside of the casing from the top of the <br /> cement to within 65 feet from surface. A 65 foot cement plug then will be set from the top of <br /> the mud to the surface. The above ground well head will be cut down to ground level and a <br /> surface hole location marker will be installed. The marker will be 6 feet in length and welded <br /> to the top of the casing. The marker will have welded on the surface the name of the <br /> operator, well number, the lease number and the legal description. <br /> 4.4. WATER SUPPLY WELLS <br /> It is estimated that for the 50,000 tpy pilot plant operation, an approximate average flow of <br /> 50 to 70 gpm of water will be required. This water will come from one or more of the <br /> following: <br /> • Shallow wells up to approximately 100 feet deep in the northeastern part of the Lease <br /> area along and within 100 feet of Yellow Creek, in conjunction with a surface water <br /> diversion on Yellow Creek near the shallow wells; and <br /> • A deep well of approximately 1,200 feet into the R-8 Zone and/or A-Groove. <br /> Water from one or more of these sources will be stored in the water storage pond shown in <br /> Figure 1-2. Water use is discussed further in Section 6 Utilities. <br /> Water supply wells will be completed similar to that shown in Figure 4-4 for the deep water <br /> supply well, although a 6 inch surface casing likely will be used for the shallower wells <br /> versus a 9 5/8 inch casing for the deep well. For the latter, a 12 inch to 12 1/4 inch diameter <br /> bore hole will be drilled to approximately 40 feet and a 9 5/8 inch diameter surface casing <br /> will be installed and cemented to surface in the bore hole. An 8 to 8 3/4 inch diameter hole <br /> will be drilled to approximately the A-Groove or a shallower depth for the shallow wells. <br /> G:IMM78545.002%MinePlen%MINEPLAN.DOC 4-8 <br />