2022-11-07_REVISION - C1981041 (2)

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5. Consumptive use of water at the Roadside Mine consisted of domestic water used at the surface facilities and preparation plant, mine water used at the preparation plant, applied to underground roadways, and adsorbed to the coal and refuse,and water from the Highline Canal used for dust suppression on surface roads. Quantities of water consumed at the mine were reported annually in the Annual Hydrologic Report. Quantities consumed during active operations in water year 1992 were as follows: Gallons Used Location Used Domestic Water 1,397,000 Surface Facilities 2,150,000 Preparation Plant Mine Water 3,350,000 Mining 3,150,000 Preparation Plant 750,000 Underground Roads Highline Canal 1,170,000 Surface Roads The operator has shown appropriate documentation of right for water consumption. Domestic water is supplied by Palisade Domestic Water. Since cessation of mine and wash plant operations in 1999, water consumption has declined dramatically, and is now limited to surface dust suppression associated with reclamation operations and loadout operations. All mining and operations have ceased. No additional depletions are anticipated other than mine water gravity discharge at Outfall 016. Surface Water Quality Possible hydrologic impacts on quality of surface water due to the Roadside and Cameo Mines include impacts to: I. Colorado River water due to mine water discharge, and 2. Runoff from surface disturbance. 1. As discussed in Section ILA. of this document,the operator previously submitted a report to the Colorado Department of Health(CDOH)addressing the feasibility of treatment approaches to reduce salt contribution to the Colorado River. Based on review of the report, CDOH determined that no action was required of the operator to reduce salt contributions to the river and the operator has been exempted from specific numeric limitations or construction of new treatment 33