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1 <br />Annual Certification <br />' :KSttCY4'9~"C~N.Wy~R'p:'RSY::C(`~`~O%~ <br />Operator. Kaiser Ventures, Inc. <br />Facility: Chimney Rock Mine, C-81-023 <br />Pond Identification: Pond Number 004 <br />Type of Pond: Sedimentation. Earthen embankment. Riprap-lined earthen emergency spillway. <br />Corrugated metal pipe (CMP) riser (with weep hole) and barrel primary spillway. <br />' Rules 4.05.9 (10) and (11) <br />' The requirement for this section of this certification is Rule 4.05.9 (10) and (11) of the Regulations of the <br />Colorado Mined land Reclamation Board for Coal Mining. References within this certification quote Rule <br />Number 4 unless otherwise noted. <br />The elevation datum for this certification is the top of the primary spillway riser at 89.0'. <br />(e) Existing and reQUired monitoring procedures and instrumentation. <br />' Inspections o[ the pond are required quarterly [Rule 4.05.6(13)]. Quarterly inspections were made on 328/96, <br />627/96, 92/96, and 29 October 1996. <br />A stake (instrumentation to monitor sediment volume, Permit, Para 2.05.3, page 2.05-2, Rev. 3-1-94) is in <br />place. <br />(b) The design depth and elevation of anv impounded waters at the time of the initial certification report or <br />the average and maximum depths and elevations of anv impounded waters over the past rear for the annual <br />certification reports. <br />' Based on the quarterly inspection reports over the past year, the average equivalent depth and elevation of <br />impounded waters was 0.8' and 80.8', and the maximum equivalent depth and elevation was 2.6' and 82.6', <br />' respectively. <br />(c) Existing storage capacity of the dam or embankment. <br />' The existing (29 October 1996) storage capacity of the pond is estimated to be approximately 3.1 acre feet <br />[from the sediment level to the invert of the emergency spillway (reference Sedimentation Pond As-built, Rev. <br />1, 5-30-91, and 1996 4th Quarter Inspection Report)]. <br />' (d) Anv fires occurring in the construction material up to the date of the initial certification or over the oast <br />year for the annual certification reports. <br />' No fires were reported up to the date of the initial certification, and no indication of fires in the construction <br />materials of the dam was observed during the past year. <br />' Chimney Rock Mine Pond #004 Certification, 3 December 1996, Page 1 of 3 Pages <br /> <br />