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drill rig positioned over the surface casing will then be utilized to drill a 12 1/4 inch diameter <br /> hole to a depth of approximately 2,000 feet and circulated clean. Occasionally drill core may <br /> be cut in the saline zone to confirm geologic predictions as well as for grade control. <br /> The drilling operations will have blow out preventers to prevent the accidental release of <br /> methane during drilling. <br /> Deviation surveys will be periodically conducted during drilling to ensure that the hole does <br /> not exceed 1 to 2-degree drift from the vertical. High strength carbon alloy steel 9 5/8 inch <br /> intermediate casing will be placed to the total depth (near the top of the mining horizon) in <br /> each hole, with approximately 12 centralizers and a drillable float shoe at the bottom. A best <br /> management practice attempt will be made to cement the annular space of the 9 5/8-inch <br /> casing from the top of the mining interval to surface. High sulfate resistant and heat <br /> resistant cement will be used to cement the casing from the top of the mining horizon to at <br /> least the bottom of the B-Groove. If the cement does not reach the surface, the remaining <br /> annular space will be filled with a gel-type mud (9 pounds per gallon or greater weight). <br /> Figure 4-3 shows a typical completed production well. The locations of the wells are shown <br /> on Figure 1-2. When wells are completed a temperature log, cement bond log or cement <br /> evaluation log will be run to determine the cement height and quality of the cemented <br /> casing. <br /> Tanks will be used to store water at the drill pads for use during drilling operations. All drill <br /> cuttings will be placed in mud pits located near each well. Mud pits will be used for one to <br /> two wells and will be reclaimed after drilling. <br /> In order to protect critical winter range for mule deer, exploration, drilling and other <br /> development activity will be closely coordinated with the U.S. Bureau of Land Management. <br /> Following the completion of a production well, the well will be properly tested for mechanical <br /> integrity, a production tubing(s) will be installed in the well. There may be up to three <br /> production tubings installed with intermediate annular gas spaces for insulation and cap gas <br /> injection. The well head and pack off assembly will be placed on top of each well with <br /> injection/extraction lines connected to the well head assembly. <br /> G:%LM1M78W.00ZMinePlanWINEPLAN.DOC 4-6 <br />