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• iii iiiiuiiiiiu iii • <br />October 4, 1991 <br />To: G.C. Dodson <br />From: J.C. Lenz <br />Subject: September Monthly Operating Report <br />1. Mill Operations <br />1.1 Crushing <br />Approximately 100,132 wet tons of ore were crushed <br />in September. Operating availability of the primary <br />crusher was 80.7$. A new CV-O1 belt was installed <br />and vulcanized on September 5th. Throughput <br />restrictions were lifted by the installation of the <br />new belt. No major operating promlems were <br />experienced this month. The most common reasons for <br />downtime during the month were the alignment of CV- <br />O1 and slab rock blockages of the feeder and the <br />crusher. <br />1.2 Grinding <br />111,709 dry tons of ore were ground during September. <br />Operating availability of the plant decreas@d to 80.9$ <br />this month. Average plant throughput for the month <br />increased to 192 tons per hour. Major downtime was caused <br />by relining the SAG mill which consumed 70 hours of <br />downtime. CV-03 was replaced during September. Power <br />consumption rose to 30.3 kwh/ton. <br />After completion of the mill lining job, tonnage <br />throughput increased to a maximum of 5300 tons on <br />September 30th. <br />