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GCC Rio Grande, Inc. — Pueblo Cement Plant and Limestone Quarry Exhibit E <br />This seed mixture will be applied at the pure live seeds per square foot rate indicated in Table 3. The <br />stabilization seed mixture will be planted using drill methods as described under Seeding Methods. The <br />cool- season grasses contained in this seed mixture are adapted to growing conditions that occur during the <br />spring and early summer, and fall. Therefore, this seed mixture will be preferentially planted in the late <br />fall or early spring. However, when necessary and without regard to season, the stabilization seed mixture <br />may be planted immediately following completion of earthwork associated with a hydrologic <br />control/treatment structure. Additional care will be taken to monitor the germination and establishment of <br />this seed mixture, since stability of hydrologic control/treatment structures is critical to their proper <br />performance. <br />Permanent Rangeland <br />Permanent rangeland seed mixtures will be used to establish vegetation communities on reclaimed areas. <br />Permanent rangeland seed mixtures will contain a variety of cool and warm season grasses, forbs, and <br />sub - shrubs. Two variations of the permanent vegetation seed mixture will be used at the Mine, including <br />upland prairie and prairie swale. The upland prairie variation will be used on reclaimed lands in upland <br />areas that fall outside of drainage swales (see post- mining topography). A typical upland prairie mixture <br />is presented in Table 4 Permanent Vegetation Seed Mixture The upland prairie variation of this seed <br />mixture will include a large variety of cool- season grasses, warm- season grasses, forbs and sub - shrubs. <br />Initially, the pure live seed composition of the upland prairie seed mixture will be approximately 30% to <br />35% cool- season grasses, 30 to 35% warm- season grasses, 20% to 25% forbs and 15% to 20% sub - <br />shrubs. These life form compositional percentages are general targets only and may be adjusted as <br />permanent vegetation establishment efforts are monitored and evaluated at Mine. <br />The prairie swale seed mixture will be used in drainage swales that will be reconstructed in reclaimed <br />lands during the backfilling and grading process. A typical prairie swale seed mixture is presented in <br />Table 5 Permanent Vegetation Seed Mixture Prairie Swale. The drainage swale variation of the <br />permanent vegetation seed mixture will include a large variety of cool- season grasses, warm- season <br />grasses, forbs and sub - shrubs. With regard to life forms, the pure live seed composition of the prairie <br />swale seed mixture will be similar to the upland prairie mixture. The seed mixtures will vary in that an <br />emphasis will be placed on cool and warm season rhizomatous grass species, with a reduced emphasis on <br />forbs and sub - shrubs. These life form compositional percentages are general targets only and may be <br />adjusted as permanent vegetation establishment efforts are monitored and evaluated at Mine. <br />Shrubs and trees may be added to the permanent rangeland seed mixtures when disturbed lands are <br />reclaimed that have the potential to support woody plant species. Steeper slopes ( >5h:ly) with northerly <br />aspects and rockier soils are best suited for shrub and tree establishment and growth. Slopes with these <br />aspects generally have reduced herbaceous vegetation, increase infiltration, lower evapotranspiration and <br />higher soil moisture availability, all which serve to promote woody plant species growth. Shrubs and trees <br />will be included in the permanent rangeland seed mixture when areas are reclaimed that have the potential <br />to support them. A typical augmentative shrub /tree seed mixture is provided in Table 1 GCC Rio <br />Grande Pueblo Mine Potential Reclamation Species The shrub /tree mixture will be applied at the pure <br />live seed rate indicated on Table 6. The shrub /tree mixture may be combined with the permanent <br />rangeland mixture or it may be seeded separately. <br />Timing of Seeding Operations <br />There are two generally accepted primary periods for conducting planting operations on arid and semi- <br />arid rangelands, including a fall and a spring planting period. When possible and practicable, seeding <br />operations will be conducted during these two general periods. Variations in timing of fall and spring <br />Revised June 29, 2011 <br />E -9 <br />Exhibit E — Reclamation Plan <br />