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following day. <br />Blasting warning; No surface blasting is done at this mine. The <br />explosive storage area was identified by a sign. <br />Topsoil markers: Posted at all storage areas. <br />Stream course buffer: Not applicable. <br />HYDROLOGIC SYSTEM <br />Drainage control; The upper bench at the mine did not have a <br />ditch as shown in the mine plan. The ditch along the mine access <br />road, the north spoil area road and the drainage swale in the <br />yard were not maintained to design. All of the above were <br />included in Notice of Violation # 92-01 issued by the Division. <br />The drainage plan at the loadout was unclear and did not appear <br />to be in place as shown on the plan map. DMG will include this <br />as part of a permit deficiency for the loadout. <br />Diversions: Not applicable. <br />Siltation Structures: The sediment pond at the loadout facility <br />was an existing structure. DMG took field measurements to <br />determine the adequacy of the structure. A small amount of water <br />was found in the pond. Nothing was found during the inspection <br />to indicate instability. <br />The two sediment ponds at the mine site both contain single <br />closed channel spillways. The company has submitted a revision <br />to include open channel spillways in the ponds but it has not yet <br />been approved by DMG. It is my understanding that the upper pond <br />will contain the runoff from a 25 year, 29 hour storm event even <br />with the spillway closed. During inspection of the Bench pond a <br />discussion with DMG indicated that the single closed channel <br />spillway might be retained. In order to retain the single closed <br />channel spillway the sediment pond must provide containment of <br />the 25 year, 24 hour storm event. <br />8 <br />