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north to the south side of the road, moving the water into a pre-existing drainage swale. <br /> PROJECT MANAGER will mark the location of each low water crossing in the field prior to <br /> construction beginning. <br /> Specifications <br /> The low water crossings shall be constructed to the specifications of Figure 1, Low Water <br /> Crossing. The crossings will be constructed at about a thirty-degree (30 °) angle to the axis of the <br /> road, and will have a fall of five percent (5%) across the axis of each crossing. Ingress and egress <br /> routes shall be no steeper than 6H: 1 V. The down hill slope of the crossings will be over filled to <br /> accommodate anticipated volumes of water passing through the low water crossings. The <br /> crossings shall be slightly longer than the width of the road above and below the crossing in order <br /> to capture water from the ditch above each crossing, and in order to allow the water to move into <br /> the pre-existing drainage swale below each crossing. Durable rock shall be placed at the base <br /> and on the sides of each crossing. The rock shall be placed as a blanket with a coarse of <br /> screened one-inch (1") underlying a coarse of screened two-inch (2") rock. A course of clean four- <br /> inch (4") rock shall be placed over the other two (2) courses at the base of the crossing. <br /> Durable rock riprap shall be placed from the end of each low water crossing into the pre-existing <br /> drainage swale for a distance of thirty feet (30') below the end of each crossing. The rock placed <br /> in the pre-existing shall consist of two-inch (2") screened rock, overlain by clean four inch (4") rock. <br /> The rock shall be placed within these channels, which are approximately twelve inches (12") wide <br /> at the base, and onto the side slopes for an additional twelve inches (12") per side, as measured <br /> from the outside margin of the base of each channel. <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 shall be made per low water crossing installed. Payment shall be made at the unit price <br /> established in the Bid Schedule, Item 1. The unit price bid will cover all costs for excavation, and <br /> rock placement per specifications. The price bid shall be considered full compensation for all <br /> equipment and materials necessary and incidental to completing the low water crossings to the <br /> specifications of this Task. Payment shall be as this Task is completed and approved by the <br /> PROJECT MANAGER. <br /> Task 2 Rolled Dip Construction <br /> A rolled dip will be constructed on the Pits 2 /3 Road approximately four hundred feet (400') above <br /> the low water crossing completed during Task 1, above. This rolled dip will be constructed in order <br /> to move water from the south to the north side of the haul road. This rolled dip will be constructed <br /> to the specifications of Figure 2, Rolled Dip Construction. (NOTE: see facilities figure 3). <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 5H: 1 V. 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 (2'). <br /> Rock shall be placed within the rolled dip, including the base and the side slopes. The rock placed <br /> 3 <br />