Laserfiche WebLink
Section 816.1161a) Continued <br />Revegetation Success -Kerr Mine Area <br />Pre-law disturbance areas (areas seeded prior to August 3, 1977) will only be subject <br />to a vegetative cover standard, with cover sufficient to control erosion. <br />Otherwise revegetation success will be measured through the use of reference area <br />data combined with baseline data for the Salt Flat vegetation type, where <br />appropriate, for the Kerr Mine Area. As shown on Map 18, Kerr Mine Vegetation, for <br />each vegetation type which will be disturbed by mining, except for the Salt Flat type, <br />a reference area has been established within the permit boundaries. The relationship <br />of the reference areas to their corresponding vegetation types was established by <br />baseline sampling and statistical analysis, as more fully discussed in Section 779.19. <br />In each case, the analysis determined that reference areas were representative and <br />could be used as a standard for the corresponding vegetation types. A summary of <br />analysis results is compiled as Table 31, Summary of Statistical Analysis. Other than <br />use of the boundaries for individual vegetation types to determine disturbance <br />• acreages as a basis for calculation of weighting factors and use of the Salt Flat <br />vegetation data, where applicable, baseline vegetation data will not be used to <br />evaluate revegetation success. <br />Revegetation will be deemed successful relative to the parameters of cover and <br />production when mean sample values for total cover and herbaceous production on <br />the revegetated sites is equal to or greater than the calculated 90 percent confidence <br />interval for the weighted average cover and production. Weighted average values <br />will be based on sampling data for the relevant reference areas and/or Salt Flat <br />baseline data. Statistical analysis based on current DMG guidelines will be utilized as <br />the basis for evaluation of cover and production values. It should be noted, that <br />cover and production measurements will focus on total cover and herbaceous <br />production as explained in Section 780.18. <br />TR-10 816-156 Revised August 1999 <br />