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CROPLAND REFERENCE AREA <br />Production. The results obtained from the 107 production trar~sec:ts sampled on this site are presented <br />in Table 3, Cropland Reference Area -Production. The average total production on this site was <br />detemuned to equal 31.14 g~V2mz. Perennial grasses contributed an average of 2.74 gN2mz or 8.80 <br />percent of the total forage production and perennial forts, which was almost exclusively, Alfalfa, <br />contributed an average of 28.39 g/1l2m2 or 91.20 percent of the total production. Examination of Table 2, <br />Trapper Mine Sample Adequacy Caculalions, documents that the forage production on this site at the 90 <br />percent confidence interval was detemrined to equal 212.8 transects. Trapper received written approval <br />from Mr. Dan Mathews of the DMG to stop sampling at 107 trar>.sects. Documentation of this approval <br />is found in the attached memo dated 16 August 2004 ,which states that by using the two sample, one <br />sided, reverse null success demonstration approach , an adequate number of production trarlsec;ts had <br />been sampled. The locations of the 107 production trursects are shown on Map 1, Cropland and <br />Rangeland Reclamation -Vegetation Transact Location Map. Copies of the original field data sheets for <br />this area are found in Exhibit A -Copies of Cropland Reference Area -Production Field Data Sheets. <br />CROPLAND RECLAMATION BLOCK CR 994 <br />Productiou. The results obtained from the sampling of the 30 production transects on <br />Cropland Reclamation Block CR-93-94 are presented in Table 4, Cropland Reclamation Block CR-93- <br />94 -Production. Forage production on this reclaimed block averaged 128.35 gN2mZ. Since this forage <br />• production value exceeds the Cropland Reference Area value of 31.14 g~V2m2, it can be concluded that <br />the forage production on this site satisfies the revegetation success standard for the reference area. <br />Perern~ial grasses averaged 53.12 g/1/2m2 and contributed 41.39 pereznt of the forage and perennial <br />forts, which was mostly Alfalfa, contributed an average of 75.23 gMrn2 or 58.61 percent of the forage <br />produced on this site. <br />The locations of the 30 production transects sampled on this area are shown on Map 1, <br />Cropland and Rangeland Reclamation -Vegetation Transect Location Map. Copies of the <br />field data sheets concsponding to this site are found in Exhibit B - Copies of Cropland Reclamation <br />Block CR-93-94 -Production Field Data Sheets. Exvnination of Table 2, Tiaplxr Mine Sample <br />Adequacy Calculations, reveals that sample adequacy at the 90 percent confidence interval was equal to <br />53.0 tiarLSects. Since the production on this reclaimed site (128.25 g/1/2rrrZ), exceeds the Cropland <br />Reference Area value (31.14 g/1l2rnZ), using the DMG's proposed reverse null approach, sampling can <br />stop with 30 transects, therefore, a sufficient number of samples was taken. <br />RANGELAND RECLAMATION BLOCK AD&H-A/B -995 <br />Plant Cover. The results obtained from the sampling of the 20 plant cover transects on this site are <br />presented in Table 5, Rangeland Reclamation Block AD&H-AB-93-95 -Plant Cover. Total plant cover <br />on this site averaged 51.90 percent and litter averaged 34.45 percent (Table 5, Rangeland Reclamation <br />Block AD&H-AB-93-95 -Plant Cover). <br />The revegetation success standard for this site is 52 % "allowable cover" which includes at least 33 <br />