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Measurement and Payment <br /> T:sere will be no measurement for payment for ditch and berm elimination, grading, and ripping. <br /> Payment for these portions of Task 3 will be reflected in a lump sum bid under Item 3 on the Bid <br /> Schedule. This lump sum bid will cover all costs for drainage ditch elimination, grading of the <br /> road surfaces to achieve the design specifications, road berm removal, trash and debris <br /> removal road ripping operations, soil distribution and roughening of the Mine 1 /2 Training <br /> Center area. Payment shall be as this task is completed and approved by the PROJECT <br /> MANAGER. <br /> TASK 4: ROLLED DIP CONSTRUCTION <br /> Rolled dips will be constructed along the graded roads. The purpose of the rolled dips is to <br /> channel water from up slope areas off of the graded roads to the out slopes at frequent <br /> intervals. Map 4, Hydrologic Structures, depicts the approximate location of the rolled dips to be <br /> constructed at Roads B, C, D during execution of Task 4. The locations of the rolled dips shall <br /> be marked in the field by the PROJECT MANAGER using wood lathe or other suitable means <br /> prior to construction. <br /> The following table lists each road, and the approximate number of rolled dips to be constructed <br /> on each. Road widths are depicted on Cross Sections B-1 through D-18. The Huntsman Ridge <br /> Road is estimated to average twenty feet (20') in width. <br /> Road Number of dips <br /> B 8 <br /> C 42 <br /> D 31 <br /> Huntsman 20 <br /> Rolled dips will be built to the specifications contained in Figure 1, Rolled Dips. The dips will be <br /> constructed at an approximately thirty degree (300) angle to the road length. Excavated dirt <br /> shall be placed on the down slope side of the dip. The slopes of the dips shall not be steeper <br /> than 3 H : 1 V. The depth of the ditch at the outlet as measured from the downslope side of the <br /> road adjacent to the dip shall be two feet (2'). <br /> Energy dissipation structures will be built at approximately half of the constructed rolled dips. <br /> PROJECT MANAGER will identify in the field which dips will receive the energy dissipation <br /> structures. The purpose of these structures is to disperse the runoff which will pass through the <br /> dips prior to the water flowing down the fill slopes below the rolled dips. <br /> A log will be placed at the outlet of approximately fifty (50) of the rolled dips. Each log must <br /> have a minimum diameter of eight inches (8"), and must be at least six feet (6') in length. The <br /> log will be placed three feet (3') below the outlet of the specified dips, perpendicular to the fall of <br /> the slope, so that the log is centered in relation to the axis of the dip (equal lengths of the log <br /> must be placed on either side of the up-gradient and down-gradient sides of the axis of the dip). <br /> Care must be exercised so that the log is placed as close to level as possible. Each log will be <br /> dug into the fill slope so that at least four inches (4") of the log is buried, and four inches (4") of <br /> the log is exposed. The trenches will be backfilled with the material excavated to create the <br /> trench, and the backfill must be compacted by hand. Each log will be anchored in place by <br /> 13 <br />