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The north decline east and west non-discharging sumps are designed to contain <br />the 25-year 24 hour storm event without discharge. The sumps were dry during the <br />inspection. The sumps were certified by Larry M. Reschke, P.E. on December 21, <br />1992. Based on visual observations during the inspection and a hand level survey of <br />the depth of the sumps, the sumps have excess capacity plus the following design <br />capacity: <br /> Water Sediment Total <br />East Sump - A-F 0.08 N/A 0.08 <br />West Sump - A-F 0.32 N/A 0.32 <br />The sewage lagoons located at the unit train loadout consist of an aeration lagoon and <br />a series of three non-discharging lagoons. During the inspection, the aeration lagoon <br />and first lagoon were dry. The second and third lagoons (cells 3 & 4) contained some <br />water at approximate elevation 4758. The capacity of the lagoons is not considered <br />important and is therefore not presented. The lagoons are inactive. The embankment <br />on all of the lagoons needs to be graded to smooth out erosional features. Plans are to <br />delay maintenance of the embankments until the sewage lagoons have been re- <br />activated. Reclamation will likely occur before the system is activated. <br />To the best of my knowledge and belief, the impoundments with the exception of the <br />sewage lagoons, have been maintained as designed and in accordance with the <br />approved plan and applicable regulations. ~~~~~ ~~.~ ~~~ <br />~~ <br />6.p}'~~7s~C~ - ~a~ d <br />a ~ "` ~ Date <br />James E. Stover ~' ~ ~~~=-~i1-, ~ <br />Colorado Professional: ~ineer ~';~~ <br />Registration No. 192` ,~ , , ,, <br />~~ ~J~ <br />~' <br />® ~raa~, G <br />-4- <br />