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3,150,000 Preparation Plant <br />750,000 Underground Roads <br />Highline Canal 1,170,000 Surface Roads <br />The operator has shown appropriate documentation of right for water consumption <br />Domestic water is supplied by Palisade Domestic Water. <br />Since cessation of mine and wash plant operations in 1999, water consumption has declined <br />dramatically, and is now limited to surface dust suppression associated with reclamation <br />operations and loadout operations. <br />All sediment ponds in the permit area are designed to retain less than ten acre -feet of <br />water. The largest designed pond is Pond 6, with a maximum capacity of 3.95 acre -feet. <br />This pond has a primary spillway with a gated valve which allows for dewatering of the pond <br />as soon as the discharge can meet effluent limits. Any water that may be detained in the <br />sediment ponds is not put to any beneficial use. The sewage treatment lagoons are designed <br />to treat 0.24 acre -feet within a two -week period. No water rights are required for the <br />sediment ponds or the sewage lagoons. <br />Water depletion projections were updated to reflect current and anticipated future conditions <br />in association with PR -3, in 2007. Annual depletion of 22.1 acre feet was projected, and is <br />described in amended Tab 16, Section 2.05.6(1) of the permit application. <br />Surface Water Quali ty <br />Possible hydrologic impacts on quality of surface water due to the Roadside and Cameo Mines <br />include impacts to: <br />1. Colorado River water due to mine water discharge, and <br />2. Runoff from surface disturbance. <br />As discussed in Section ILA. of this document, the operator previously submitted a report to <br />the Colorado Department of Health (CDOH) addressing the feasibility of treatment <br />approaches to reduce salt contribution to the Colorado River. Based on review of the report, <br />CDOH determined that no action was required of the operator to reduce salt contributions to <br />the river and the operator has been exempted from specific numeric limitations or <br />construction of new treatment facilities. Quarterly total dissolved solids monitoring is still <br />required. <br />Mine discharge from the Roadside Mines were estimated to increase soluble salts in the river <br />by 0.1 percent and dissolved iron by 0.2 percent (November 4, 1982 DMG Findings <br />Document). These predictions have proven to be accurate to date. <br />In its 1982 Findings, the Division also predicted that water quality effects would be "minimal <br />and will not significantly decrease water quality in the Colorado River." Surface and <br />groundwater monitoring to date have supported these projections. <br />30 <br />