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_i <br />although this is not anticipated based upon the patterns of inflow <br />established thus far. <br />Water Importation and Balance <br />_ Approximately 496,000 tons of coal was produced from the <br />' Orchard Valley West Mine from July 1, 1989 through June 30, 1990. <br />Production estimates for the following year remain at approximately <br />600,000 tons. <br />1 Mine water importation is estimated from recorded flows and <br />related tonnages at the Orchard Valley Mine from September of 1985 <br />I through April of 1986. Calculations from recorded measurements <br />indicated approximately 2.5% by weight of imported water (in <br />relation to the total raw coal tonnage) is used for face and <br />roadway dust control. This translates to an import water usage of <br />approximately 2,973,000 gallons from July ,1989 through June, 1990. <br />1 From historical detailed coal sampling at the face and on the <br />surface, an approximate 1% moisture gain from the inplace value to <br />_ the train loadout point is apparent. Consequently, approximately <br />I 1,189,000 gallons of water were imported for face coal dust <br />control. Therefore, approximately 1,784,000 gallons of water were <br />_ used for roadway dust control with a small percentage of this <br />1 evaporating as humidity into the air and being expelled from the <br />mine. <br />Hvdroloaic Impacts <br />No significant increase in mine inflow occurred relevant to <br />undermining Panel H during the last year. Panel H was in fact <br />found to be drier than Panel G mined during the previous year. The <br />Location of Panel H with respect to Steven's Gulch may account for <br />the relatively drier conditions encountered as compared to Panel G. <br />y Inflow amounts are projected to increase slightly with the <br />development of Panels A, A+, and the II West Submains during the <br />_ '90 - '91 reporting period. Potentially elevated mine inflows are <br />anticipated due to the location of mining development with respect <br />to surficial drainage features. Overall mine inflows are again <br />anticipated to be insignificant, short term events with no lasting <br />hydrologic impacts evident. <br />Conclusions <br />Mine inflow into the Orchard Valley West Mine continues to be <br />low. The present flow rate is estimated to be less than 1,000,000 <br />gallons annually. The importation of water continues to far exceed <br />the occurrence of natural mine inflows. Cyprus Orchard Valley Coal <br />1 Corporation anticipates that water inflow into the mine will be <br />1 increasing approximately proportionally to the amount the D seam is <br />I <br />