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water crossing will allow water to drain from the north to the south side of the road, moving the water into apre- existingdrainage Swale. PROJECT MANAGER will mark the location of each low water crossing in the field pdor to construction beginning. Specifications The low water crossings shall be constructed to the specifcations of Figure 1, Low Water Crossing. The crossings will be constructed atabout athirty-degree (30 u) angle to the axis of the road, and will have a fall of five percent (5%) across the axis of each crossing. Ingress and egress routes shall be no steeper than 6H: 1 V. The down hill slope of the crossings will be over filled to accommodate anticipated volumes of water passing through the low water crossings. The crossings shall be slightly longer than the width of the road above and below the crossing in order to capture water from the ditch above each crossing, and in order to allow the water to move into the pre-existing drainage Swale below each crossing. Durable rock shall be placed at the base and on the sides of each crossing. The rock shall be placed as a blanket with a coarse of screened one-inch (1 ") underlying a coarse of screened two-inch (2") rock. A course of clean four-inch (4") rock shall be placed over the other two (2) courses at the base of the crossing. Durable rock rip rap shall be placed from the end of each low water crossing into the pre-existing drainage Swale for a distance of thirty feet (30') below the end of each crossing. The rock placed in the pre-existing shall consist of two-inch (2") screened rock, overlain by clean four inch (4") rock. The rock shall be placed within these channels, which are approximately twelve inches (12") wide at the base, and onto the side slopes for an additional twelve inches (12") per side, as measured from the outside margin of the base of each channel. Durable rock is defined as rock material which gives off a ringing sound when struck with a hammer. Measurement and Payment Payment shall be made per low water crossing installed. Payment shall be made at the unit price established in the Bid Schedule, Item 1. The unit price bid will cover all costs for excavation, and rock placement per specifications. The price bid shall be considered full compensation for all equipment and materials necessary and incidental to completing the low water crossings to the specifications of this Task. Payment shall be as this Task is completed and approved by the PROJECT MANAGER. Task 2 Rolled Dip Construction A rolled dip will be constructed on the Pits 2 13 Road approximately four hundred feet (400') above the low water crossing completed during Task 1, above. This rolled dip will be constructed in order to move water from the south to the north side of the haul road. This rolled dip will be constructed to the specifications of Figure 2, Rolled Dip Construction. The dips will be constructed on an angle thirty degrees (30~) from perpendicular to the road length. Excavated dirt shall be placed on the down slope side of the dip. The slopes of the dips shall not be steeper than 5H: 1 V. The depth of the ditch at the outlet as measured from the downslope side of the road adjacent to the dip shall be two feet (2'). Durable rock rip rap shall be placed within the rolled dip, including the base and the side slopes. The rock placed in the rolled dip shall consist of two-inch (2") screened rock, overlain by clean four inch (4") rock. Durable rock is defined as rock material which gives off a ringing sound when struck with a hammer.