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<br />Semi-Annual Subsidence Report Page 4 <br />Southfield Mine <br />March 14, 1995 <br />^ Thompson Ranch Buildings <br />^ Refuse Disposal Area <br />^ Powerlines and Substations <br />^ Florence Waterline <br />1. It appears that not all of the inventoried <br />structures are being ,monitored and not included in <br />the subsidence report. Why has EFCI not included <br />all the above structures in the monitoring plan? <br />V. Recommendations for future reports <br />1. EFCI should include a mine map with the report to show <br />where mining has occurred since the last report and where <br />mining is anticipated during the next report period. The <br />map should also include the structures inventoried and <br />the monitoring network. The map should also show <br />previously mined out areas. <br />2. EFCI should include in subsequent reports, the methods <br />used to obtain the subsidence data. <br />3. Conduct visual inspections for evidence of surface <br />cracking. Provide a summary of the inspections in the <br />subsidence report. <br />The Division requests your assistance in determining the due date <br />for EFCI's semi-annual subsidence report. These dates are not <br />clear in the Division's files. <br />EFCI should respond to the Division's adequacy letter by April 21, <br />1995. Please call if you have any questions, <br />S i~jcez`ely , <br />c <br />~.'hristine E. Joh on ` <br />Environmental P o ction Specialist <br />CEJ/014SUH94 <br />