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Revegetation. <br /> Revegetation activities in 1990 included temporary and permanent revegetation of <br /> disturbance areas at the Nucla Mine. All areas seeded in 1990 are shown on Exhibit 1. <br /> Temporary revegetation using Seed Mix #3 (Tab 22 Nucla Permit C-81-008) was completed at <br /> topsoil stockpiles 8 and 13 and on topsoil berms located adjacent to the monitoring well <br /> access road in the western portion of the permit area. Stockpiles 8 and 13 were <br /> broadcast seeded at the specified rate for this seeding method. The topsoil berms and <br /> access road were seeded using a combination of broadcast and drill seeding at the rate <br /> specified for each method. Seed Mix #3 was also used to temporarily revegetate sediment <br /> ponds 001, 002, 004, 005, and 006. The seeding of these ponds included the embankment <br /> areas and the pond areas above the designed high water line. The pond areas were <br /> broadcast seeded using Seed Mix #3 at the specified broadcast rate. <br /> Permanent seeding was completed on 15.3 acres in the Pit 2 reclamation area and the <br /> former locations of topsoil stockpiles 9 and 10 (Exhibit 1). Seedbed preparation in these <br /> areas consisted of disking operations on the contour. The permanent seed mix (Seed Mix 1, <br /> Tab 22) was drill seeded at the specified rate in the fall of 1990. <br /> All permanently revegetated acres were mulched with clean grain straw at a rate of one <br /> ton/acre. The applied mulch was anchored by crimping. There was no mulching conducted on <br /> temporary revegetated areas. <br /> There were no weed control or revegetation monitoring activities conducted at the Nucla <br /> Mine in 1990. <br /> Chronological History of Revegetation <br /> Previously revegetated areas at Nucla Mine are listed by field number in Table 5 and shown <br /> on Exhibit 2. The revegetation field identification consists of a two digit number <br /> identifying the year the field was final seeded (e.g., 90=1990), followed by either a <br /> single number or a combination number and letter (e.g., - 1 or - 1A). The single number <br /> or combination number and letter is unique to each field. A single number following the <br /> seeding year indicates the field was revegetated using a particular seeding treatment or <br /> seed mix. <br /> 4 <br />