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Prior to seeding, which will be initiated as soon as practical after final grading, topsoiled sites will be chisel- <br />plowed in order to alleviate compaction and promote water infiltration. Chisel-plowing has been a highly <br />effective means of temporary stabilization prior to vegetation establishment. Dollhopf et al. (1977) reported that <br />chisel-plowed topsoil at the Savage, Beulah and Colstrip Surface Mines were only surpassed by the radical <br />treatment of dozer basins in reducing overland water flow from reclaimed mine sites. The water detention <br />capacity of chisel-plowed topsoil is reported by Dollhopf et al. (1977) as 176,400 liters per hectare, or 2,521.3 <br />cubic feet per acre. <br />Another stabilization technique which serves to minimize erosion is contour furrowing. Disturbed land within <br />the proposed permit area will be contour furrowed following seeding. Atypical cross section of a contour <br />furrow is depicted in Figure 12, Design of Typical Contour Furrow. According to data derived from studies at <br />the Energy Mine No. 1, the water detention capacity of these furrows, when spaced thirty feet apart, is 2,599.7 <br />cubic feet per acre. <br />MR09-235 2.05-106.2 02/16/09 <br />