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c) Measurement and Payment <br /> No measurement for payment shall be made for mobilization and <br /> demobilization. A lump sum bid for mobilization and demobilization shall <br /> be reflected unaer Item 1 of the Bid Schedule. Payment of two-thirds of <br /> the lump sum price will be made with the first monthly progress payment <br /> after completion of the work described above for mobilization . Payment <br /> of one-third of the lump sum price will be made with the final progress <br /> payment for the work if demobilization has been completed. If the price <br /> bis for mobil ization and demobil ization is greater fi fteen percent (15%) <br /> of the total contract price, invoices supporting the mobilization costs <br /> will be required before payment is approved. <br /> TASK 2 Coal Spoil Removal and Placement �" _ i& 250 yds <br /> a) Strip-Pits p 1'r 2 — 26 (,SO y�,5 <br /> Q11-3 — 22 300 yd <br /> The three strip-pits have been designated PIT 1 , PH 2, and PIT 3 from <br /> north to south (See site map ). PIT 1 is an elongated NW-SE trending <br /> double high-wall trench which tapers in width ana decreases in depth to <br /> the northwest. The estimated volume of PIT 1 is 16,250 cubic yards. A <br /> bridge of unexcavatea material separates PIT 1 from PIT 2 to the <br /> southeast. PIT 2 is rectangular and has steep walls on both the east and <br /> west sides . The northern end of this pit has a relatively gradual <br /> profile. The southern end of PIT 2 adjoins the east-northeast side of <br /> PIT 3, which is a 40 foot, south-facing single high-wall open cut. The <br /> estimated vol umes of PIT 2 and PIT 3 are 26 ,650 cubic yards and 22,300 <br /> cubic yards respectively. Total estimated volume of the existing <br /> strip-pits is 65,200 cubic yards. d✓S <br /> (Jog- l-I SIL - I(o/ D0© y <br /> b ) Coal Spoil Piles c5-1" SPO it- — l000ycIs <br /> Coal spoil available for backfil 1 ing is distributed in two areas. The <br /> largest spoil pile, located at the northern end of the project area, <br /> consists of a flat-topped, fan-like pile with a central cone. This pile, <br /> designated NORTH SPOIL, is estimated to contain 16 ,000 "in place" cubic <br /> yards of material . A small coal spoil pile located southwest of the <br /> NORTH SPOIL will also be used in pit backfilling. This material is <br /> designates WEST SPOIL and has an estimated "in place" volume of 1 ,000 <br /> cubic yards. Coal spoils existing on the east side of the project area <br /> will remain in place. Estimated total "in place" volume of usable coal <br /> spoil material on site is 17 ,000 cubic yards. <br /> In this phase of the project, the CONTRACTOR will excavate, transport, <br /> and backfill coal spoil into existing strip-pits to maximize depth of <br /> burial of coal spoil in each pit. Coal spoil shall be backfillea in <br /> maximum two foot lifts and each individual lift shall be wheel <br /> compacted. The distribution of coal spoil into pits will be roughly as <br /> foll ows: <br /> -6- <br />