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RECEIVED OCT 17 1997 Annual Certification ,;~.i51C,~~;,,,,,,e,~,~~,Gcclony 1997 Operator: SLURCO Corporation Facility: Canadian Mine, C-81-026 Pond Identification: Pond Number 1 The basis for this section of this cettification aze Rtiles 4.05.9 (10) and (11) of the Regulations of the Colorado Mined Land Reclamation Board for Coal Mining. (al Existing and required monitoringprocedures and instrumentation. Examinations of the pond are required quarterly by a qualified registered professional engineer or other qualified individual under their direction [Rule 4.05.6(13) and 4.05.9(13)]. Quarterly inspections were made on February 4, 1997, May 14, 1997, August 8, 1997, and October 1, 1997. All inspections were made under the direction of Mr. Larry D. Baccari, a registered professional engineer. Mr. Baccari's qualifications are outlined under paragraph (1) below. There is no existing or required instrumentation associated with the pond. (bl The design deRh and elevation of any impounded waters at the time of the initial certification report or the average and maximum depths and elevations of env impounded waters over the nest year for the annual certification reports. The design depth of the impounded waters was 6 feet (between the base of the dam and the inven of the emergency spillway) and the design maximum elevation of impounded waters was 8200 (elevation of the invert of the emergency spillway) feet at the time of the initial cenit"ication report (Figure 2, Mining and Reclamation Plan, March 30, 1981, with 6 Revisions). T'he average depth of impounded waters (repotted in the four 1997 quarterly reports) is approximately 3.25 feet, an elevation of 8197.25. The maximum observed depth was 6.5 feet, an elevation of 8200.5. (cl Existing storage capacity of the dam or embankment. The existing storage capacity of the dam is estimated to be approximately 6.4 acre feet (from the equivalent sediment level to the inven of the emergency spillway)(S[age-Storage Curve Sedimentation Pond #1, Figure Q-3, 11/29/94). (dl Any fires occurring in the construction material up to the date of the initial certification or over the past year for the annual certification reports. No fires were reported up to the date of the ittitial cettification, and no indication of fires in the construction materials of the dam was observed during the past year. (el Anv other aspect of the dam or embankment affecting stability. No aspect of the dam currently affects stability. Some areas of sparse vegetation require attention [Rule 4.05.6(g)] Canadian Strip Mine Pond #1 Cettifica[ion, October 8, 1997, Page l of 3