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W LJ SECTION 120 W -73 EXCAVATION AND EMBANKMENT A. Earthwork, including earthwork for drives and retention ponds outside the right-of-way limits, shall be paid for as regular excavation. Any excavation to the proposed bottom elevation of the select fill shall be paid for as regular excavation. Cost shall include all work specified in this Section and Section 120 of the Standard Specifications. The quantity of regular excavation is provided due to the evaluation that excavated material will not meet the specifications for roadway embankment. Any excavated material that does not meet r the specifications for roadway embankment shall be disposed of by the Contractor with no additional compensation. Such price and payment shall specifically include all cost of any roadway, lateral ditch or canal, and final dressing operations in accordance with Section 4W 120-13.3. B. Earthwork quantities shall be considered as in-place material with no shrinkage or expansion factors. C. Subsoil Excavation — Any excavation below the proposed bottom elevation of the select fill, isolated swale bottom locations, isolated locations for pipe installations, and as approved by 4W the Engineer, shall be paid for as subsoil excavation. Approximately 2.5 ft of subsoil excavation is required in sublateral canals and ditches located under proposed roadway and drainage culvert improvements. Cost of replacement embankment shall be included in w cost of subsoil excavation. Contractor to coordinate with County representative prior to any subsoil excavation. .. D. Embankment: General Requirements for Embankment Materials: Roadway Design Standard Index No. 505, Embankment Utilization Details is modified by the addition of the following: Embankment Select Material (A-1, A-3, A-2-4) shall not contain more than 12% passing the U.S. No. 200 sieve. • Fill materials shall be placed at or slightly dry of their optimum moisture content for compaction as determined by AASHTO T-180. Fill soils will be dried prior to placement in " the embankment. Any stratum or stockpile or soil which contains obvious pockets of highly organic material • may be designated as muck or unsuitable for construction of subgrade by the Owner. Backfill material containing more than 2.0% by weight of organic material, as determined by �. FM 1-T267 and by averaging the test results for three randomly selected samples from each stratum or stockpile of a particular material, shall not be used in construction of the reinforced volume. If an individual test value of the three samples exceeds 3.0%, the stratum or stockpile will not be suitable for construction of the reinforced volume. 1, W -73