Laserfiche WebLink
VII. Backfillin¢ and Grading <br />1. The Division has approved a vaziance from meeting approximate original contour <br />for reclaimed azeas located at the lower Hubbazd Creek azea and at the Bear Creek <br />facilities area (both azeas aze pre-law disturbance). The Division has approved a <br />modification in the general grading requirements of 4.14.2 since sufficient spoil will <br />not be available (4.14.2(1)). <br />VIII. Reveeetation <br />1. Previously the Division had approved the use of introduced species in the <br />reclamation seed mix. The seed mix was revised in TR-27 to include all native <br />species. TR-40 revised the seedmix again to provide. for additional forbs and woody <br />plants to enhance overall stand diversity. Cicer milkvetch (anon-native species) was <br />added to the mix and the grass component was modified by a reduction in overall <br />seeding rate and increased diversity. Specific exceptions were made for some small <br />disturbed areas on US Forest Service land. <br />2. The Division has approved the use of mulching with straw at the rate of 4,000 <br />pounds per acre crimped in on slopes less than 3H:1 V. On steeper slopes, <br />hydromulch or straw held down with netting will be used as a means to meet soil <br />stabilization requirements (4.15.4). <br />3. Methods to measure herbaceous cover and production aze discussed in Appendix H <br />of the permit application. The methods follow those suggested in the DMG Bond <br />Release Guideline, 1995. The Division has granted Oxbow Mining's request for the <br />elimination of the woody stem density standard for the reclamation of the mine site. <br />The Division has approved these techniques (4.15.7(1)). <br />4. Species diversity will be determined successful for bond release azeas greater than <br />10 acres when at least four perennial species have a relative cover between 3% and <br />60%. Of the four species at least one will be a forb or shrub, and applicable <br />perennial grasses will be cool-season species. Species diversity for areas less than <br />10 acres will be determined successful when at least three perennial species will <br />have a relative cover between 1% and 60%. Of the three species, at least one will be <br />a forb or shrub, and applicable grasses will be cool-season species. <br />5. Comparisons between reclaimed and undisturbed azeas, in order to demonstrate that <br />the success criteria of 4.15.8, 4.15.9, or 4.15.10 have been met, will be based on the <br />following: <br />1) Comparison of cover and production on most revegetated azeas with reference <br />areas established during the baseline vegetation study. <br />25 <br />