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PIT VOLUME OF COAL SPOIL <br /> PIT 1 5 ,400 placed cu. yds . <br /> PIT 2 8,200 placed cu . yds . <br /> PIT 3 3,400 placed cu. yds. <br /> The above stated volumes have a ratio of 3 :5 :2 indicating that for every <br /> 3 yards of coal spoil placed into PIT 1 , 5 yards are placed into PIT2 and <br /> 2 yards are placed into PIT3. Coal spoil shall be placed into strip-pits <br /> to maximize depth of burial in each pit. It will be noted that the above <br /> listed volumes are estimations. On-site approval of coal spoil <br /> backfill ing by the PROJECT MANAGER is required before backfill ing of <br /> overburden material can commence. <br /> c) Measurement and Payment <br /> There will be no measurement for payment. Payment for this task will be <br /> reflected in a lump sum bid under Item 2 on the Bid Schedule. This lump <br /> sum bid price will cover payment of all costs for excavation , transport, <br /> and backfilling of coal spoil into strip-pits. Payment shall be as this <br /> task is completed and approved by the PROJECT MANAGER. Payment for this <br /> task shall be made only for that amount shown under Item 2 of the Bid <br /> Schedule. Any or all incidental costs incurred by the CONTRACTOR shall <br /> be reflected in each Bid Item or shall be paid at the CONTRACTOR's <br /> expense. <br /> TASK 3 Overburden Removal , Placement and Grading <br /> a) Overburden <br /> Following the pre-mining removal of topsoil and subsoil , a series of <br /> shales, sandstones and sandy shales were blasted and removed to <br /> access underlying coal . This material has been placed in PILE C which <br /> has an estimated volume of 75 ,000 "in place" cubic yards. This material <br /> consists of pulverized rock debris and rock fragments . As part of this <br /> phase of the project, the CONTRACTOR will use overburden material from <br /> PILE C to complete the backfilling of the strip-pits . The CONTRACTOR <br /> will determine the most desirable method of removal and transport of <br /> material from PILE C, however, overburden shall be removed to reduce <br /> overall height of C and not removed from just one end or sides Unused <br /> overburden remaining in PILE C will be smoothen to meet final design <br /> profile as specified below. Overburden material will be placed into <br /> strip-pits to backfill remaining void space. Overburden material will be <br /> placed in maximum 2 foot lifts and each individual lift will be wheel <br /> campacted. The PROJECT MANAGER will provide control stakes to delineate <br /> outer pit margins for backfill ing. <br /> -7- <br />