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ITEM 6.0— SAFEGUARD NORTH HIGHWALL AND SITE GRADING <br /> A HIGH PRESSURE GAS PIPELINE RUNS APPROXIMATELY FIFTY FEET(50FT)TO THE NORTH OF THE <br /> HIGHWALL. <br /> UNDER NO CIRCUMSTANCES SHOULD ANY PORTION OF THE NORTH HIGHWALL BE EXCAVATED OR <br /> INTENTIONALLY COLLAPSED TO PROVIDE FILL MATERIAL OR ACHIEVE THE REQUIRED GRADE. <br /> The CONTRACTOR will safeguard an estimated four hundred linear feet (400 Lf) of highwall that <br /> ranges between eight to twenty feet (8 to 20 ft) in height (See attached Site Plan). Approximately <br /> 5,100 cy of fill material will be required. The highwall will be safeguarded by backfilling with onsite <br /> materials against the existing highwall to achieve a minimum slope with three feet of horizontal <br /> distance for every one foot of fall (3h:1v slope). Fill material shall be placed in two foot (2ft) lifts and <br /> compacted with mechanical compaction techniques approved by the PROJECT MANAGER. <br /> Thorough compaction shall consist of a minimum of two (2)passes with a CAT D6 dozer(or approved <br /> equivalent) over all areas so that the marks overlap one another. Equipment shall be tracked forward <br /> in a single pass perpendicular to the slope and return along the same path. <br /> Five onsite stockpiles containing an estimated seven thousand two hundred five cubic yards (7,205 <br /> cy) of fill material are identified in the attached Site Plan. These stock piles may be utilized as fill <br /> material for the completion of Task 6. In the event that a stockpile is only partially utilized then any <br /> disturbed portions of the stockpile must be graded to achieve a maximum 3h:1v slope and <br /> revegetated in accordance with Item 8.1 of the project specifications. <br /> Table 1 - Estimated Stockpile Volumes <br /> Stock Pile Volume (cy) Distance to North <br /> Highwall (ft) <br /> A 3250 400 <br /> B 2400 475 <br /> C 480 450 <br /> D 200 500 <br /> E 125 200 <br /> F 750 400 <br /> Total 7205 <br /> Please note these figures are estimates and the CONTRACTOR is responsible for verifying all <br /> estimates prior to bid submittal. No outside fill or organic matter shall be utilized for backfill or site <br /> grading unless approved by the PROJECT MANAGER. <br /> Final grade elevations must be approved by the PROJECT MANAGER before revegetation begins. <br /> Measurement and Payment <br /> No measurement for payment shall be made for safeguarding the highwall and site grading. Payment <br /> will be lump sum for item 6.0 on the Bid Schedule. The price bid for Item 6.0 will cover all costs for <br /> completing the activities required under this Task. Payment shall be as this task is completed and <br /> approved by the PROJECT MANAGER. Such payment shall be considered full compensation for all <br /> Page 12 of 16 <br />