Laserfiche WebLink
would be the placement of light riprap facing over geotextile fabric. This work should be scheduled for <br />the next planting season, or, in the case of enhanced protection, during the dry season to avoid disturbance <br />to other reclamation work. <br />The following items of special interest are recommended for next year quarterly inspections: <br />At a time of high water levels, the areas of burrow activity need to be probed with a rod to determine <br />iF seepage is occurring (no seepage or signs of prior seepage were noted during this inspection). <br />Continued monitoring of rodent activity is recommended. Should burrows continue to be a problem, <br />implementation of additional (to those recommended) rodent control procedures to halt the <br />burrowing activity on the dam may be required. <br />Annual Certification <br />The basis for this certification is Rule Number 4, Section 4.05.9 (11) of the Regulations of the Colorado <br />Mined land Reclamation Board for Coal Mining. References within this certification quote Rule Number <br />4 unless otherwise noted. <br />al Existing and reauired monitoring procedures and instrumentation. <br />Inspections of the pond are required quarterly [Section 4.05.6(13)]. The appropriateness of three of the 1994 <br />quarterly inspections is the subject of a Notice of Violation. This issue is being addressed under separate <br />cover. Rodent burrowing activity has been recommended as an item of special interest in next year quarterly <br />inspection reports. There is no existing or requircd instrumentation associated with the dam. <br />(h) The design depth and elevation of any impounded waters at the time of the initial certification report or <br />the average and maximum depths and elevations of nny impounded waters over the past year for the annual <br />certification reports. <br />The design depth of the impounded waters was 6 feet (between the base of the dam and the invert of the <br />emergency spillway), and the design maximum elevation of impounded waters was 8200 (elevation of the invert <br />of the emergency spillway) feet, at the time of the initial certification report (Figure 2, Mining and <br />Reclamation Plan, March 30, 1981, with 6 Revisions). The average depth of impounded waters observed <br />(reported) in the 4 quarterly reports is 2.6 (get, an elevation of 8196.6. The maximum observcd depth was 4.5 <br />fee[, an elevation of 8198.5. <br />(cl Existing storage capacity of the dam or embankment. <br />A cursory survey of the dam was accomplished during the forth quarterly inspection. Reduction of the survey <br />information indicates an exiting storage capacity of ten acre-feet. <br />(d) Any fires occurring in the construction material up to the date of the initial certification or over the past <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 />Canadian Mine Pond # 1, Quarterly Inspection Report and Annual Certification, 24 October 1994 <br />Page 4 of 5 <br />