1989-10-10_REVISION - M1988112 (16)

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6.0 FILL MATERIALS • 6.1 General The embankment, disposal area drains, collection pond, access roads, and other appurtenant facilities incorporate different types of fill material as specified herein. Fill materials shall be obtained from approved sites and local borrow areas. Road base and drain materials shall be either produced in the vicinity of the site or imported. No embankment or synthetic materials shall be placed until the foundation and subgrade preparations have been completed and approved by the Engineer. Subsequent placement of fill shall be made only in areas approved by the Engineer. Placement of the fill shall be done to the lines and grades shown on the Drawings. Fill shall be placed in near horizontal lifts unless otherwise approved by the Engineer. Fill placement procedures and equipment • 1 shall be organized and suitable for constructing a relatively uniform fill meeting minimum density and/or compactive effort requirements, if required. fill surfaces shall be graded to drain as materials are placed. The Contractor shall dewater or provide drainage for ponded water conditions in fill areas. The procedures for the construction using fill materials shall be discussed with, and approved by, the Engineer prior to placement. In particular, construction procedures shall be such to prevent damage to synthetic liners and contamination or damage to drain pipes. Construction procedures shall incorporate methods for minimizing traffic over initial lifts of fill above these materials. Open pipes shall be temporarily capped, as needed, for protection from runoff flows or nearby earthwork in progress. Fill shall be of inorganic soil or rock materials. The • suitability of all materials intended for use in fill construction 19