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1. regrading of slopes to MLRB required 3:1 or less steep ?; removal of stockpiled materials on ridge top 3. establishment of stable slopes covered by native grasses as dominant vegetation 4. control of aggressive weeds in disturbed areas especially diffuse knapweed South Area (98 acres) I. regrading to blend surface with natural land forms and eliminate existing scatt~;red stockpiles 2. establishment of stable surfaces covered with vegeation dominated by native; grasses 3. protection of culrural resources 4. avoidance of impacts to threatened plants or animals such as Ute Ladies' 'T'resses orchid (Sprranthes diluvralis) or Preble's IVleadow Jumping mouse (Zapus hudsonr;rs preolei) 5. integration of wetland and water storage in the reclaimed South Area landscapes. Existing water rights could be exercised in stand establishment and support of long-term growth of some aeeas 6. control of asgressive weeds on disturbed aeeas especially diimse knapweed in conjunction with control operations throughout the area Stockpiled Materials Testing has determined the stockpiles to be of no economic value. The report by Scott, Cox & Associates (see Attachment C) outlines that due to the expansive nature of the material the only use would be for a temporary (dry weather) road or for fill material where e~tpansion is not an issue. Given this information, these stockpiles will be ve^~ costly to move off-site and will be difficult to give away. Staff proposes to offer this material to other City departments for their use and hauling e~tpense, however, the possibiliry of this material being removed from the Varra Pit in the near tuture is very remote. The stockpiles are also infested with knapweed. Weed control will ~:ontinue to be di$tcult on the stockpiles due to their steep slopes until their removal. With many complex issues assocated with the South Area, staff decided to focus efforts on the North Area fast. OnVTarch 13, 1996, the City ofBoulder Open Spats Board of Trustees (OSB~ approved the following reclamation plan for the north gravel area. The Souu`t Area reclamati~m plan will be developed and submitted for OSBT approval in July or August 1996. Implementation is planned for Fall 1996 or Spring 1997. APPROVED PLAN -NORTH ARE? REGR-~DL~TG Do minor regrading using over 24,000 csbic yards of on-site material excluding the gravel stockpiles, regrading the site to a finished slope of 3:1 (Se` Attachment B- Reclamation Gradinc. Plan), add'mg Berasso Water Treatment Plant residuals as topsoil and revegetating with native grasses. This plan meats the MI-RB reclamation requirements. Advantage: creates a finished slope of 3:1, the minimum slope for weed control. the on-site gravel stockpile will be not be moved but grill be offered to other City Departments for their use and hauling expense. Disadvanta;e: cost of regrading using on-site materials as well as portions of the north and south edges of the deep clay pit area. The east clay pit will not be reclaimed until the fate of the stockpiled materials is determined.