2010-05-07_PERMIT FILE - C2009087 (47)

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W H W MON7GOMERYWA7SON HARZA July 11, 2002 Robert J Shevling Seneca Coal Company P.O. Box 670 Hayden, Colorado 81639 RE; Stock Pond Hazard Evaluation Dear Mr. Shevling: On November 15,2001 I visited the Seneca II mine site and inspected the following existing stock ponds: T -1, T -3, T-4, T -5, T -7, T -8, T -10, T -11, T -12, T -13, T -15, T -16, T -17, T -20, T -25, T -26, T -28, T -29, T -30, T -31, T -32, and T -33. In addition, I reviewed all the as -built surveys that were completed. Also during the inspections it was noted that reclamation was nearly complete at the site and that there was no residential or commercial structures immediately below any of the existing stock ponds. All stock ponds are constructed in reclaimed areas and are not primary sediment control structures. They all have a relatively small storage capacity (no greater than two -acre feet) and embankment no greater than 5 feet high measured from the invert of the spillway to the up stream toe of the embankment. All the embankments appeared to be in good condition. A few stock pond spillways had erosion problems that were noted on the pond inspection reports submitted to Seneca Coal Company. Given that the existing stock ponds are relatively small in size and there is no residential or commercial structures or mining operations immediately below any of the existing structures, they do not create a threat to public health and safety or threaten significant environmental harm. If you have any question or require additional information please not hesitate to call Sincerely O �Q,�fl . REG /S'��.,, Thomas E Leidich PE = : ~ 31459. • Or • . Supervising Engineer A� •. ; = cam s l0 ; 165 South Union Blvd. Suite 410 Lakewood, Colorado 8022E iel: 303 763 5140 Fix;,30J7§.3 8f` Oeliverino innovetive Projects and Solutions Worldwide