Laserfiche WebLink
In the unlikely event that mining operations should resume, the permittee has committed on <br />page 20 -10 of the permit application to modify the subsidence control and mitigation plan <br />as necessary, prior to resumption of operations within the South Portals mine area. <br />5. Consumptive use of water at the Roadside Mine consists of domestic water used at the <br />surface facilities and preparation plant, mine water used at the preparation plant, applied to <br />underground roadways, and adsorbed to the coal and refuse, and water from the Highline <br />Canal used for dust suppression on surface roads. <br />Quantities of water consumed at the mine are reported annually in the Annual Hydrologic <br />Report. Quantities consumed during active operations in water year 1992 were as follows: <br />Surface Water Quality <br />Gallons Used Location Used <br />Domestic Water 1,397,000 Surface Facilities <br />2,150,000 Preparation Plant <br />Mine Water 3,350,000 Mining <br />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 <br />declined dramatically, and is now limited to surface dust suppression associated with <br />reclamation 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 <br />pond as soon as the discharge can meet effluent limits. Any water that may be detained in <br />the sediment ponds is not put to any beneficial use. The sewage treatment lagoons are <br />designed to treat 0.24 acre -feet within a two -week period. No water rights are required for <br />the sediment ponds or the sewage lagoons. <br />Water depletion projections were updated to reflect current and anticipated future <br />conditions in association with PR -3, in 2007. Annual depletion of 22.1 acre feet was <br />projected, and is described in amended Tab 16, Section 2.05.6(1) of the permit application. <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 />Permit Revision No. 5 30 July 10, 2012 <br />