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HIVING AND RECLAA9ATION PLAN MT. GUNNISON NO. 1 MINE 4.5.6 Revegetation Maintenance ~i October, 1979 Revised January 30, 1931 Revised March, 1981 Revised October 29, 1981 Revised November L8, 1981 Revised December 1, 1981 Soil erosion may be controlled through the use of mulch, matting, chemical stabilizers, or other appropriate techniques. Gullies will be filled and stabilized. During revegetation, maintenance activities will be conducted parallel to the contour unless such activities prove hazardous to equipment and/or operators. Then grading will be done by working upslopes or diagonally across the slope. Mulch will be used where needed after planting to control erosion until vegetation is established. Bare patches of failed planting will be prepared and replanted. Where there is evidence of poor soil conditions, the area will be retreated or the topsoil replaced as conditions dictate. Attempts will be made to control noxious weeds during reclamation by mowing or other appropriate methods approved by the Division. 4.5.6.1 Riparian Areas Certain facilities will be constructed within the 100 foot riparian buffer zone identified in Figure 4.5.6.1. Such facilities include the water intake gallery, sediment pond overflow ditches, railroad siding, and railroad .loadout facility. Within Section 9 T13S R90 W the 100 foot wide riparian buffer zone encompasses 11.9 acres along the north and south shorelines of the North Fork Gunnison River. Of this total acreage only 1.2 acres is covered by riparian vegetation; the remainder is rock debris and an industrial area as depicted in Exhibit 2.3.S.C. The total disturbance within the riparian buffer zone is 1.3 acres. Of this total disturbed area only 0.4 acres is presently covered by riparian vegetation. See Figure 4.5.6.1 for details. 4-24 --- - - _ - ------ -- ----~--~--~=_'^- = -yam----= __._