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Some of these factors can be measured ahead of time for the broad scope of a revegetation project <br />but unique inclusions and microsites frequently are overlooked when using a site specific approach. <br />Most factors we can only make an educated guess at. The situation becomes even more complex <br />when factors start to interact and compound. The complexity of the controlling factors dictates the <br />need for diverse seed mixes to achieve the success criteria. The greater the influence the adjacent <br />vegetation has on a given site decreases the need for additional species in a seed mix. Voids in filling <br />minor niches will allow native species from adjacent lands to establish. Tables V-10 and V-11 provide <br />a list of revegetation species and recommended seed mixes for large permanent sites, small and linear <br />sites, and interim and drill sites. These mixes were formulated to be adapted to the wide range of <br />conditions that occur at the Deserado Mine. The locations to which these mixes apply are further <br />explained on Table V-15. Interim sites refer to areas revegetated to stabilize the area but where future <br />disturbancesand subsequentpermanentrevegetationare planned. <br />The general context in which seed mixes are specified here refers to the broad spectrum of the <br />revegetation of a site. Interspecies competition and the revegetation success criteria may drive the <br />seeding of select species or groups of species at the exclusion of others over limited portions of a site. <br />These special seedings generally require applying the desired specie(s) at 1 to 10 times the normal <br />rate stated for the sites seed mix on the specific area seeded. <br />Suitable growth media are replaced to depths between 4 and 24 inches on permanently revegetated <br />sites. The shallower areas correspond to sites where shallow soils were present prior to the removal <br />of topsoil. The thicker replacement depths correspond to those areas where maximum depths of <br />native soils occurred. The use of container shrub tubelings as transplants into revegetated areas is not <br />recommended initially. Revegetation projects in the region have demonstrated significant success with <br />seeding shrub species in highly channery soils. The sites revegetated in these projects were prepared <br />by ripping to produce maximum micro-sites and mulched with natural materials. Emergence and <br />establishment of seeded shrub species was significantly greater than that typically expected for <br />tubeling transplants (CSU 1979, C-b Shale Oil Venture E.B. Baker pers. comm. 1980). <br />ExhibitE-Reclamation Plan Rio Blanco Special Use Permit#81-1 September2000 <br />V-18 <br />