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Search, 19921. The bulkheads proposed by SGC are intended to return the ground- <br />water system to an approximation of the flow regime which existed under natural, <br />pre-mining, conditions. <br />2.3 Reports Prepared to Evaluate Impacts of Proposed Bulkheads at the Sunnyside <br />Mine <br />This report estimates the influence that local hydrogeology will have on the <br />effectiveness of the proposed bulkheads, and the impact that the proposed bulkheads <br />wilt have on the ground-water flow system in the vicinity of the Sunnyside Mine. Also <br />considered are the probable effects that installing the proposed underground <br />bulkheads will have on the chemistry of ground water and surface water. Two other <br />reports have been prepared to date which pertain to other aspects of the proposed <br />bulkheads. An assessment of the natural (pre-mining hydrologic system and present <br />hydrology was given in "Preliminary Characterization of the Hydrology and Water <br />Chemistry of the Sunnyside Mine and Vicinity, San Juan County, Colorado" dated <br />February 11, 1992 by Simon Hydro-Search. Engineering aspects of the proposed <br />bulkheads, including mechanical strength of the bulkheads and adjacent wall rock, and <br />the chemical and physical integrity of the bulkheads, were addressed in "Bulkhead <br />Design for the Sunnyside Mine, Sunnyside Gold Corp., An Echo Bay Company" by Dr. <br />John F. Abel, Jr., PE. <br />sunnylwpltraci122511Mer1993.Rpt <br />N~f SIR10t1 HYDRO-SEARCH <br />