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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. The <br />vegetative cover will be comprised of native and introduced species that are desirable and <br />necessary to achieve the approved postmining land use as required under Section 4.15.2. The <br />seed mixture to be planted is shown in Section 2.05 on Table 7, Reclamation Seed Mixture. <br />The details of the revegetation plan are discussed in Section 2.05.4. <br />4.15.1(4) Vegetation Monitoring <br />The monitoring plan to evaluate the success of shrub plantings, mature transplants, natural <br />reinvasion by sagebrush, as well as initial herbaceous vegetation success is as follows: <br />1. To facilitate identification, sampling of herbaceous vegetation will take place during <br />the peak of the growing season when the vegetation reaches the mature stages. This <br />period oftime is generally from late June to early August. <br />Unlike sampling for bond release purposes, sampling will not be required to meet <br />statistical adequacy. <br />2. During the first growing season of a reseeded area, a visual determination of seeded <br />and volunteer species will be performed. From-this information, any apparent <br />revegetation issues will be determined for the seeded species, and unsatisfactory <br />stands of any component can be identified for corrective action. <br />3. During the second and fourth growing season of a reseeded area, herbaceous cover <br />and woody plant density information will be gathered. This information will be <br />gathered at the species level and will reflect the effectiveness of the seed mixture and <br />volunteer species. Colowyo will also monitor areas seven years and older to assess <br />their status toward approaching the maturity necessary for bond release testing. <br />4. The data and an assessment of the monitoring results will be submitted in the Annual <br />Reclamation Report. A map will be included to delineate the reclaimed areas being <br />sampled each year. The Annual Reclamation Report will also provide details <br />regarding restricted interseeding or other mitigative measures implemented as a result <br />of the vegetative monitoring program. <br />5. Weed control measures may include mowing, discing (conventional cultivation), <br />burning, grazing, or applying an approved herbicide. Weedy species provide initial <br />site stabilization and moisture conservation. Seedings on reclaimed sites have greatly <br />out competed initial weed infestations within three or four growing seasons. Weed <br />control will be implemented for any noticeable weed concentration of species listed <br />in the Colorado Noxious Weed List. Other weed species that seriously threaten the <br />long term continued development of desired vegetation will also be managed using <br />well accepted agronomic methods. <br />4.15-1 Revision Date: 3/2/06 <br />Revision No.: MR-81 <br />