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~_ . WATTI2 HAI1~ trPr]A'IF: FOR (S2TPPf F. ~ AND VIClDTt GOLD MINII~ CQ4PANY- 1989 OPERATIONS Pad No. 4 - Fartlard Pad During 1988, 672,000 DST of ore was placed on Pad No. 4 as the first ore to this pad. With one very small exception (< 50,000 T) this was con~leted/sprayed in a single lift ranging frrun 8-30 ft. and averaging 20-25 ft. in depth. Also during 1988, further capital improvements and design changes were made such that not only can most modules be operated completely i.rrleperrlently, but a) all Pad 4 solutions can be directed either to Fad 3 Fonds or Pad 4 Fonds and b) Fad 3 Ponds arri Pad 4 FbrrLs can exchange solutions by gravity flow/p4mg~s (4 to 3) or Via pumps (3 to 4) . This oonq~lete interwnnecti~ of ponds vastly improves operating flexibility and ~Y~m~zes the solution storage capacity acoesss form both sets of ponds. A. Anrnral Water FSalarne Calculations Annual water balance calculations are based on a worst~:ase analysis using a max;nnim precipitation value of 33 inches of water (the naxinnntt value of record). The sprayirg/leaching season is assumed to cover the months of late-March thrvuc~r mid-November with targets of about 100 days of spraying on Pad No. 3 coupled with 240 days on Pad No. 4. High precipitation years typically show 75 to 80 percent of the annual precipitation during these months. The operating plan for 1989 production on Pad No. 4 calls for operation of the pad using both sets of ponds: a. enlarged Victory Pad ponds -Pad No. 3 Fonds and, b. new ponds constructed solely for use by Pad No. 4 -Pad No. 4 Porrls. Pad No. 3 will be operated during the season to spray old ruck for residual gold production. Pad No. 3 will be sprayed only frmn the Pad No. 3 FbrKl system, while Pad No. 4 will be sprayed fr~n both porn systems. Total spray capacity front the combined systems is 1100 GFM, and will be directed to only Pad No. 4 during peak production, or split partially to Pad No. 3 during about 100 days of the year. During these periods, proportionately less ore will be sprayed on Pad No. 4. In general, part of the flow (trp to 400 GPM) will be direc-~ked to F*ad No. 3 for old rock early in the season (when all of Pad No. 4 is not ready for spray) and later in the season (when most of Pad No. 4 rock has been leached). Most annual operations will direct all 1100 GFM to Pad No. 4 aryl use both pond systems for solution handling. During periods of split flow (about 700 GPM Fad No. 4 + 400 GFM Pad No. 3) as well as periods of full Pad No. 4 spray, both pond systems will provide solution surge capacity. 1