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A new horizontal well pair was planned in panel #2 and possibly a second vertical recovery <br />• well for 1A cavity. Cavity #3 injection well 93-4AH was to be plugged and abandoned. A <br />new subsidence well was planned to monitor panel #2 mining effects <br />3.1.2 Actual Project Activities <br />NSI produced 77,513 tons of sodium bicarbonate in year 2003 using cavities #1A, 5H and 6H. <br />The plant was maintained on a constant production schedule throughout the year. Routine <br />outages were pertormed every three to four months to clean out scale buildup in the plant and <br />perform repairs/improvements. The plant and wells were down for short periods of less than <br />24-hour outages resulting from well rework, pump problems, replacement of valves and <br />equipment, and power outages. Emphasis for the year was placed on increasing production <br />efficiencies throughout the plant and maintaining production with increased flow and brine <br />grade from the wellfield. <br />The following items were accomplished in 2003: <br />/ Submitted Sundry Notice to recomplete production well 1-3A to a Dissolution Surface <br />aquifer monitoring well, permit number CO-3358-04646. <br />/ Subsidence monitoring well 2M-TDR was drilled and completed to a depth of 1833' with <br />four TDR cables. There was evidence of damage to the cables during the cement phases <br />and all four cables failed. <br />/ Well 3M-TDR was drilled and completed on the same pad as 2M-TDR to a depth of 1833' <br />with four TDR cables. At year-end two cables were operational. <br />4 <br />