2010-09-29_REVISION - M1981185 (12)

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i- Attachment A, Technical Revision to the May Day Mine Permit, September 12, 2009. (5) Proposed Uses H Storage for mining and milling uses on the Ida:io Millsite including but not limited tc. settling of tailings from the mill outlet. (6) Reservoir Surface Area and Dam Dimensions A) Surface area.of reservoir at higll water line, 0,4 acres b) Maximum Dam Height: 13 feet. Maximum height from emergency Spillway to the lowest natural ground surface along the longitudinal centerline of the dam: 10 feet (non -jurisdictional), ca Length of Dam: 200 feet (7) Land Ownership The land upon which the pond will be located is owned by Clements. 10, Tho Augmentation Plan is described as follow,: (A) Out -of- Priority Diversions to be augmented those at the Tdaho Mill Diversion. {BZPIan Details a) When the JMD surface water ri ght is in priority, water will be diverted at MD and distributed directly for Idaho Mill operations, to fill Wildcat Augmentation Ponds l and 2, and to fill the Idaho Mill Settling Pond; if necessary. All out of priority diversions under the MID shall be adir►inistered as 100% depletive to the La Plaut River. When The MM is not in priority, diversions for the mill operations from the IMD will continue only to the extent that augmentation water is available in the two Augmentation Ponds to replace diversions, If no water is avirilable in the Augmentation Ponds, then diversions from DAD will cease, b) When the IMD waterr3ght decreed herein is its priority, up to l c,f.s may be diverted at the IMD to rill the Augmentation ponds and the Idaho Mill Settling Pond, The 1 c.f.s diversion rate will allow the fonds ;o be filled quickly if the U Plata River is off call only briefly. See Paragraph 8(A)(4), The Augmentation Ponds will have low - level outlet pipes with meters and valves to control releases. Theie. will be no dead storage in the Augmentation Ponds. c) Up to 40 gpm will be needed for normO milling operations, 25% of this water (10 9.p-m) will be diverted under the IMD water right, and pumped through a pipeline to the Mill inlet, where it will bd used for mining and milling purposes, The remaining 75% (30 g.p,m.) will be pumped from the Settling Pond back to the Mill inlet, where it will be run through the mill again. The 109pm., once diverted, will be used and reused to exhaustion. From the Mill outlet, water is delivered to the settling pond. From the.