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Annual Certification 1996 Operator. SLURCO Corporation Facility: Canadian Mine, C-81-026 Pond Identification: Pond Number 2 The basses for this section of this certification are Rules 4.05.9 (10) and (11) of the Regulations of the Colorado Mined land Reclamation Board for Coal Mining. fe) Existing and required monitorlne procedures and instrumentation. Examinations of the pond are required quarterly by a qualified registered processional engineer or other qualified individual under [heir direction [Rule 4.05.6(13) and 4.05.9(13)]. Quarterly inspections were made on 28 March 1996, 9 May 1996, 22 July 1996, and 10 October 1996. The 10 Oc[ober 1996 inspection was accomplished by Mr. William Mahoney, Greystone, under the direction of Mr. Byron G. Walker, a registered professional engineer. Mr. Walker's qualifications are outlined under paragraph (1) below. There is no existing or required instrumentation associated with the pond. (b) The design depth and elevation of env impounded waters at the time of the initial certification report or the average and maximum depths end elevations of any impounded waters over the past veer for the annual certification reports. /This pond was redesigned since the initial certification. The design depth of the impounded waters was 8.5 fee[ (from the bottom of the pond to the invert of the emergency spillway) and the design maximum elevation of impounded waters was 8224.1 (elevation of the invert of the emergency spillway) feet at the time of the revised certification report (Figure 3, Reclamation Project, As -Built Topography, 11/10/87, and Appendix Q, pages Q-1 and Q-2, revised 11/30/94). The average depth of impounded waters (reported in the four 1995 quarterly reports) is estimated as 2 foot (elevation 8217.6). The maximum observed depth was approximately 3.4 toot (elevation 8219.0). (c) Existing storage capaci[y o[ the dam or embankment. The existing storage capacity of the dam is estimated to be approximately 16.2 acre feet (from the bottom of the pond to the invert of [heemergency spillway)(Stage-Volume Analysis Sedimentation Pond #2, Figure Q-4, 11/L9/'94). fd) 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 initial certification, and no indication of fires in the construction materials of the dam was observed during the past year. fel Anv other ascect o[ the dam or embankment effecting stability. Current stability of the embankment is not affected by any aspect of the dam Canadian Strip Mine Pond #2 Certification, 1 November 1996, Page 1 of 3