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III IIIIIIIIIIIIIIII <br />9~ <br />Cap Allen Engineering <br />145 East 13th Street • Durango, Colorado 81 301-51 30 <br />Kevin Martinez <br />Blue Flame Mine <br />James Pendleton <br />Colorado Mined Land Reclamation Board <br />REF: BLUE FLAME MINE RETENTION POND REPAIR <br />(303) 247.0088 <br />~~~~~~~® <br />OCT 1 2 1990 <br />Mined Land <br />Reclamation Division <br />At the request of Kevin Martinez, I have prepared plans showing modifications to the <br />existing Blue Flame retention pond that will bring the outside berm slope into conformance <br />with the 3:1 slope regulations and the width of the top berm in conformance as well. <br />Because the pond as built is substantially bigger than needed, the pond can be cut down, as <br />much as 2S feet in places, allowing for a broader base. There will still be a problem of <br />encroachment along the access road near the outlet pipe. <br />I have used the topo survey provided by MLRB of the pond plus my own field gathered <br />information to provide a base map. The map shows existing volumes at one foot intervals. <br />By cutting the spillway elevation from 8002.25 to 8000, the volume is still in excess of that <br />required for retention. <br />I would appreciate any feedback to know if this modification is acceptable to you both prior <br />to b~ginni construction. <br />`~ ou, <br />Cap Allen <br />10/3/90 <br />