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GCC Rio Grande, Inc: Red Rock Mine Drought Management Plan Other Soil Surface Stabilisation Measures Supplemental soil protection and water conservation measures can be applied to drought affected reclaimed azeas where permanent vegetation is being established. These measures may include bonded fiber matrix or an assortment of erosion control blankets. These materials and their application are described in the permit application. These soil stabilization measures will be selected based on site-specific conditions within the drought-affected azea, and the manufacturer's design criteria and application recommendations. WATER HARVESTING & RETENTION A variety of water harvesting and retention measures are provided in the Red Rock Mine revegetation plan. They include mulching, cover cropping, placement of erosion control fabrics and surface roughening. As discussed above, this plan also provides for the placement of wind barriers that can reduce evapotranspiration potentials and promote increased soil moisture content through snow capture and retention. STORMWATER RUNOFF CONTROL Storm water runoff control is an integral part of the Red Rock Mine Plan. Surface roughening that harvests and retains water on site is the primary runoff control feature for reclaimed areas. For concentrated surface water flows, stable drainage channels will be reconstructed that will convey runoff safely through the reclaimed areas. Reconstructed drainage channels will be properly constructed to minimize erosion and avoid the formation of gullies. Gully head-cutting and down-cutting can adversely impact storm water runoff infiltration and the formation of shallow groundwater resources along reconstructed drainage channels. Preventing gully formation promotes reclaimed azea stability and supports development of local groundwater resources. This in turn serves to enhance plant growth and the development of vegetation communities. Habitat Management, Inc. 9 03J03)2003