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NOTE: 30 CFR 817.83(a)(2) states, in part, "Uncontrolled surface drainage may not be <br />diverted over the outslope of the refuse pile. Runoff from areas above the refuse pile and <br />runoff from the surface of the refuse pile shall be diverted into stabilized diversion <br />channels..." <br />OSMRE encourages the operator to be more proactive by ensuring that the redistribution of the <br />topsoil and cover material is redistributed on a suitable surface as well as implementing Best <br />Management Practices (BMP's) that will prevent runoff over the face of the refuse pile. These <br />preventative maintenance actions will not only decrease unnecessary maintenance but likely <br />prove to be beneficial when OSMRE is determining reclamation success at bond release in the <br />future. <br />Pond F and associated drainages <br />Riprap in the Pond F drainage is buried as a result of the loose /unconsolidated material <br />immediately upslope. Further down Pond F drainage, tumbleweed, sediment deposition and <br />other organic material was present. Maintenance and monitoring will be necessary to ensure the <br />drainage continues to function as designed. <br />A pile of refuse material was noticed midway on bench 1 of Gob pile 44. There is minimum <br />positive drainage of approximately 100'. A pile of ungraded refuse material is preventing <br />positive flow at the conversion of bench drainage at Gob #4 and F2 ditch. Another pile of <br />soil /material was found at the conversion of the clean water ditch and "C" gulch. This needs to <br />be repaired as it may contribute to the ponding of water and possible drainage over the face of <br />the refuse pile. <br />Pond F has two inflows on the east end of the pond, and both are in good condition. Pond F has <br />been designed to utilize a generator for water removal when needed. This pond also has two <br />emergency spillways (one on the west end of the pond and the other near the west end). The <br />emergency spillway at the west end of the pond was missing riprap and has some sort of <br />corrugated sheet metal used on the outfall side for erosion protection. The pond was holding <br />water but not discharging. <br />Pond C <br />Pond C revealed an oily sheen, water jugs, and a quart container of motor oil floating on the <br />surface. Additionally, we observed a single axle generator pump next to the pond with a leaky <br />substance dripping and making its way to the pond, much like that of what was observed on the <br />surface. This generator pump did not have any secondary containment associated with it as a <br />BMP. Confirmation of the sheen substance could not be determined since no sample was <br />collected. <br />The Colorado discharge permit ( #CO- 0044776) states, in part, 'for every outfall with oil and <br />grease monitoring, in the event an oil sheen or floating oil is observed, a grab sample shall be <br />taken immediately to mitigate the discharge of oil and grease ". <br />Since the Colorado Division of Water Quality enforces the NPDES permit, a phone call was <br />made jointly by DRMS and OSMRE to discuss the details of this situation and also seek <br />