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<br /> <br />LI <br />PART1 GFNRRAT. <br />' 1.1 GRADING <br />SECTION 02200 <br />EARTHWORK <br />A. Perform grading at areas where designated by the RESIDENT PROJECT <br />REPRESENTATIVE using only on-site materials. Grade surfaces at a relatively <br />uniform slope towazd natural drainageways and towazd culverts so that no areas of <br />ponded water or localized depressions exist. <br />1.2 ADIT CLOSLTRE <br />' A. Close six (6) mine adits in accordance with the State of Colorado Department of <br />' Natural Resources, Division of Minerals and Geology regulations and in accordance <br />with the requirements of this Contract and Specifications. <br />' B. The adits to be closed and the method of closure is summarized below: <br />• Site A Backfill Closure <br />• Site B Backfill Closure <br />1 • Site C Backfill Closure <br />• Site D Backfill Closure <br />• Site E Rock Bulkhead Closure <br />• Site F CIP Bulkhead Closure <br />The RESIDENT PROJECT REPRESENTATIVE may, based on site wnditions and at <br />his discretion, elect to close the mine adits by a method other than the respective <br />closure methods assigned above. Should this happen, the newly assigned closure <br />method will be one of the methods listed in these Specifications. <br />1.3 MINOR BACKFII.LING <br />1 A. Place and compact minor backfill where required to restore to existing natural grade. <br />Backfill will be provided on site using existing materials. Fill material shall be placed <br />' in 1-foot lifts and compacted to 85 percent of standard proctor density. <br />' Cry <br />