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KENNECOTT ENERGY COMPANY <br />COLOWYO COAL COMPANY L.P. <br />ANNUAL IMPOUNDMENT INSPECTION <br />NPDES PONDS AND OTHER HOLDING PONDS <br />DATE: 9119/03 <br /> <br /> <br /> <br />m oundment Name Erosion, Instahility, <br />$lNLlufa Weakness, <br />Hazartlous Conditions <br />4.05.9 15 a <br />Monitoring procedures <br />and lnsimmentation <br />4.05.9 15 b <br />Depth of <br />Impounded Waters <br />4.05.9 15 c <br />Elevation of <br />Impounded Waters <br />4.05.9 15 c <br />Existing Storage <br />Capacity <br />4.05.9 15 d <br />Other Structural Instability <br />or Maintenance Required <br />4.05.9 15 a <br />Experienced <br />Impoundment <br />Ins ector 4.05.914 <br />Streeter Pond - 001 A Ortly, Annual Insp. <br />Work Area Sediment Pond - 002A Only, Annual Insp. <br />Gossard Pond - 003A Ortly, Annual Insp. <br />Gulch APond - 004A Ortly, Annual Insp. <br />Stoker Siding Pontl - OO5A Ortly, Annual Insp. <br />Loop Pond - OO6A Ortly, Annual Insp. <br />Prospect Pond - 007A Ortly, Annual Insp. <br />West Pit Pontl -OOBA Ortly, Annual Insp. <br />Section i6 Pond - 009A Ortly, Annual Insp. <br />East Taylor Pond - 010A Orlly, Annual Insp. <br />Taylor Pump Holding Pond Annual Insp. <br />Evaporation Pond North Annual Insp. <br />Evaporation Pond South Annual Insp. <br />Aeration Pond Annual Insp. <br />Sediiment Sump Annual Insp. <br />W ashbay Pond - 0028 Annual Insp. <br />Stephen R. Hinkemeyer, Colorado P.E. 25436 <br />Date of Certification <br />CF 4.94003 Revised d1102003 <br />I, Stephen R. Hinkemeyer, being a Registered Professional Engineer in the State of <br />Colorado, do hereby cenify that the information displayed in this table has been <br />reviewed by me and is true antl correct to the best of my knowledge and information, <br />the above impoundments were maintained as designed, and in accordance with the <br />approved plan and applicable regulations. <br />Note: (d) impoundment volumes are estimated from pre-existing as-hunt surveys, <br />and estimates of accumulated sediment. <br />