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Subsidence Handbook Volume III, Exhibit 15 <br />• below stockponds, unless that mining occurs beneath the stock pond in overburden depths <br />of 500 feet or less, then only panel or main development mining should be conducted <br />within a 280 foot horizontal radius of the stock pond. <br />Reoair Procedure -Short-Term <br />Significant Ponds <br />1. Drain pond. <br />2. Install pond lining per manufacturer's recommendations. <br />3. Refill pond with hauled water or run-off flow. <br />Streams <br />1. Fill flow interrupting crack with native material and if necessary; <br />2. Seal flow interrupting crack with impervious material or liner. <br />3. Install a culvert across the crack. <br />Material Required -Pond Liner Material & Culverts -Local suppliers (24-hour <br />• delivery). No pond liner required on mine site. <br />Randall Industries, 745 Struthers Ave, Grand Junction, phone 242-3787 <br />Grand Junction Pipe, 2868 I-70 Business Loop, Grand Junction, phone243- <br />4604 <br />Repair Procedure -Long Term <br />Significant Ponds and Streams <br />The short-term repairof ponds and streams will be satisfactory for long-term effects. <br />The subsidence crack should close up due to relocation of the subsidence-induced <br />tension zone and natural healing due to erosion and sedimentation. <br />C~ <br />J <br />PR-04 37 01/01 <br />