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RULE 4 PERFORMANCE STANDARDS <br /> Rills and gullies which form in areas that have been regraded and topsoiled and which either (1) <br /> disrupt the approved postmining land use or the reestablishment of the vegetative covers or (2) <br /> cause or contribute to a violation of water quality standards for receiving streams will be identified <br /> during the spring of each year. Regraded and topsoiled areas will be visually inspected and rills <br /> and gullies identify. Colowyo will submit a report which provides a general description of the <br /> identified rills and gullies, activities undertaken to remediate these areas, time frames of repair, a <br /> description of any re-topsoiling and re-seeding activities, and a map idenfying the problem areas <br /> on a scale of 1-inch equals 500-feet. This report will be submitted annually no later than June 15 <br /> of each year. <br /> As rill or gully features are identified for remediation Colowyo will utilize appropriate manpower <br /> and equipment depending on the ground conditions and the extent of the erosion. This shall <br /> include but is not limited to small track dozers, blades, and small rubber tired farm tractors. <br /> Repairs will take place within three months of the visual inpsecitons being completed. If ground <br /> conditions are such where soil conditions are not favorable, repair will commence as soon as <br /> ground conditions allow equipment to access the area without creating additional disturbance. As <br /> soon as any repair takes place the area shall be seeded with the appropriate seed mixture. <br /> Generally, remediation work will commence when soil conditions are suitable each year. <br /> During repair of any rill or gully Colowyo will first identify and salvage any topsoil that may have <br /> been repositioned by erosion. This topsoil will be salvaged, stockpile in a location that is easily <br /> accessible by equipment making repairs, and re-applied after the repair of a rill or gully is <br /> complete. Once repairs are complete,topsoil will be re-applied to the disturbed area and re-seeded <br /> to the appropriate seed mixture. Colowyo is committed to preserving the topsoil resources and <br /> utilizing it appropriately through approved reclamation practices. <br /> Remediated areas will be monitored for one year following repair, and should the area appear to <br /> be stabilized monitoring will be discontinued for that area. Areas that continue to exhibit unstable <br /> conditions will be remediated again and monitored for another year. <br /> 4.15 Revegetation Requirements <br /> 4.15.1 General Requirements <br /> Colowyo will establish on all affected land within the mine plan area a diverse, effective and <br /> permanent vegetative cover of the same seasonal variety as that native to the area. On lands <br /> revegetated prior to 2008 the vegetative cover will be comprised of native and introduced species <br /> that are desirable and necessary to achieve the approved postmining land use as required under <br /> Section 4.15.2. The original seed mixture to be planted is shown in Section 2.05 on Table 7, <br /> Reclamation Seed Mixture. On lands revegetated in 2008 and thereafter,the vegetative cover will <br /> be comprised of native species that are desirable and necessary to achieve the approved postmining <br /> land uses as required under Section 4.15.2 (with modest exceptions). However, additional seed <br /> mixtures, revegetation metrics, and bond release protocols designed to target specific post-mining <br /> land use components are presented within the context of this section (4.15) as well as the <br /> reclamation plan, Section LOS. <br /> Rule 4 Performance Standards 4-46 Revision Date: 1/22/20 <br /> Revision No.: TR-136 <br />