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Task 2 Rolled Dip Construction <br /> A rolled dip will be constructed on the Pits 2/3 Road approximately four hundred feet (400') <br /> above the low water crossing completed during Task 1, above. This rolled dip will be <br /> constructed in order to move water from the south to the north side of the haul road. This rolled <br /> dip will be constructed to the specifications of Figure 2, Rolled Dip Construction. <br /> The dips will be constructed on an angle thirty degrees (30°) from perpendicular to the road <br /> length. Excavated dirt shall be placed on the down slope side of the dip. The slopes of the dips <br /> shall not be steeper than 4H: 1V. The depth of the ditch at the outlet as measured from the <br /> downslope side of the road adjacent to the dip shall be two feet <br /> Durable rock rip rap shall be placed within the rolled dip, including the base and the side slopes. <br /> The rock placed in the rolled dip shall consist of two-inch (2") screened rock. <br /> Durable rock is defined as rock material which gives off a ringing sound when struck with a <br /> hammer. <br /> Measurement and Payment <br /> Payment for construction of the rolled dip shall be at the unit price bid in Item 2 of the Bid <br /> Schedule per rolled dip constructed. Such payment shall be considered full compensation for <br /> all labor, materials, equipment and all other items necessary and incidental to the construction <br /> of the rolled dips. Payment shall be as this task is completed and approved by the PROJECT <br /> MANAGER. <br /> Task 3 Sediment Pond Dewatering Device Repair <br /> A sediment pond is located at the upper end of the Pit 4 haul road. This pond is known to leak <br /> water from the base of the corrugated metal pipe (CMP) dewatering device. The goal of this <br /> Task is to seal the base of the CMP through excavation and placement of bentonite and <br /> concrete. <br /> The pond dewatering device is a forty-eight inch (48") CMP riser, which is about ninety-two <br /> inches (92") tall., as measured from the base of the CMP at the water line. A horizontal CMP <br /> spillway is connected to the CMP riser on the embankment side of the riser. The integrity of the <br /> spillway (ie: its elevation and slope angle, as well as the integrity of its connection to the riser) <br /> must be maintained throughout the duration of the Project. <br /> The riser is positioned at the base of the pond embankment so that the bottom of the riser is <br /> located just above the base of the pond. The pond embankment rises from the base of the <br /> pond at an approximately 2H: 1V slope to its crest. The base of the riser is anchored by a <br /> concrete apron of approximately ten inches (10") in width. The thickness of the concrete apron <br /> is unknown. Water is observed to pipe around the outside of the concrete apron. <br /> In order to remediate problems associated with the CMP riser, CONTRACTOR shall <br /> accomplish the following: <br /> The CMP riser shall be cut so that the top surface of the riser is six inches (6") above the <br /> elevation of the embankment immediately adjacent to the riser. Because the embankment <br /> slopes upward to its crest, the CMP cut will parallel the slope angle. CONTRACTOR shall <br /> properly dispose of the remnant CMP material off site. <br /> The embankment shall be excavated a minimum of five feet (5) in all directions (including <br /> 4 <br />