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~~ <br />Range Lang Reclamation <br />Trapper is supposed to repl <br />Trapper provided estimates of <br />was collected in one of thre <br />"field data", and 3.) no data <br />2 <br />ace 12" of topsoil on range land. <br />replaced topsoil depths to DMG. Data <br />e ways; 1.) scraper load counts, 2.) <br />available. Greg's topsoil sampling <br />In these areas is summarized below. <br />Load Counts <br />Greg duq 27 holes in 11 parcels, representing 627.3 acres (1 hole <br />per 23 acres). <br />Avq Depth 19.2" (13.5" to 30") <br />Std Dev 7.9" <br />Range 9.5" to 51" <br />All parcels Greg checked had average depths of more than the <br />required 12 inches. On eight of the eleven parcels, Greg's results <br />indicate more topsoil than Trapper had estimated. On three of the <br />eleven parcels, Greg's results indicate less topsoil than Trapper <br />had estimated. These later discrepancies were relatively minor <br />(13.5" vs 16.7", 14" vs 16.7" and 16" vs 16.4"), and occur in areas <br />which appear to have more than the required 12 inches of topsoil. <br />It's worth noting that Trapper estimated only one parcel had less <br />than 12" of topsoil. They estimated parcel C-B-89 had 9.3". Greg <br />found 17.3" on that parcel (12, 17, and 23" holes). <br />Based on Greg's result's, i think DMG should rely on Trapper's load <br />count estimates from past years for parcels where DMG has not <br />independently verified replacement depths. If problems with <br />revegetation are evident on any parcels where topsoil depths have <br />not been independently verified, DMG should investigate that parcel <br />more closely. Otherwise, we should find that Trapper replaced <br />topsoil on these parcels as required by their permit. DMG should <br />attempt to independently verify replaced depths on all parcels <br />during each year in the future. <br />"Field Data" <br />Greg dug 19 holes in 6 parcels, representing 197.3 acres (1 hole <br />per l0 acres). <br />Avg Depth 18.6" (9.75" to 32") <br />Std Dev 9.9" <br />Range 9.5" to 45" <br />