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' Sady Plm~ Ocsign <br />Results of these analyses are also presented in Appendix I. <br />' • A "reference plot" with existing vegetation in the vicinity has been selected and fenced <br />for future reference. This is the sagebrush-wheatgrass reference area which is <br />approximately 2.0 acres in size. <br />• Success criteria will be defined on the basis of cover, woody plant density (number of <br />woody plants in unit area), species diversity, and production (gm/m2) as they relate to the <br />vegetation in the reference plot. The success criteria will be established consistent with <br />DMG's Regulation, Section 4.15.8. <br />' This phase helped WFU and DMG determine the mix of topsoil/subsoil cover which was <br />placed on the refuse pile and set a procedure for conducting statistical evaluation of the <br />revegetation success. <br />' Test Plot Reclamation Plan <br />The test plot reclamation plan consisted of the following tasks. <br />• Eight test plots, each 100' x 100' in size, were established and fenced in RP-1. Four of <br />these plots have northern exposure. The other four plots have southern exposure. <br />Figure 1 shows the location of these plots. The test plots were labelled as to their cover <br />thickness. <br />• Each set of the four test pots were covered with varying thicknesses of topsoil/subsoil: <br />12-inch, 24-inch, 36-inch and 48-inch. All pots have 12-inches of topsoil cover. On the <br />12-inch cover plot, all of the material is topsoil with no subsoil. The other three plots <br />have 12-inch, 24-inch, and 36-inch of subsoil under the 12-inches of topsoil. The test <br />plots were constructed in July, 1990 concurrent with the reclamation of the refuse pile <br />RP-1. The seed mix which was utilized on the test plots is contained in Table 1. <br />• The test plots were mulched with straw, and seeded with a rangeland seed drill to form <br />a crimped mulch. <br />4 <br />