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DIVISION 2 - SITE WORK <br /> SECTION 02290-EMBANKMENT SLOPE LINER CONSTRUCTION <br /> PART 1-GENERAL <br /> 1.01 WORK INCLUDED <br /> Construction of the embankment slope liner as shown on the detail drawings and as specified herein, <br /> including foundation preparation,dewatering, fill placement, moisture control,and compaction. <br /> 1.02 RELATED WORK <br /> A. Section 02140-Dewatering <br /> PART 2-MATERIALS <br /> 2.01 COMPACTED EMBANKMENT SLOPE LINER <br /> The embankment slope liner shall be constructed as zoned embankments in accordance with the detail <br /> drawings. The majority of the embankments will be constructed with Zone 1 soils. The more clayey <br /> material shall be placed in Zone IA,the central portion of the slope liner. The sandier material shall be <br /> placed on the upstream slopes of the slope liner in Zone 113. Since some soil property specifications for <br /> Zone I and I overlap,many on-site soils will be suitable for either zone. <br /> A. Embankment Zone IA <br /> Zone I will be constructed of clayey soils meeting the following criteria: <br /> '35 percent or greater passing the No.200 sieve <br /> 'No more than 40%retained on the No.4 sieve <br /> 'Minimum plasticity index of 12% <br /> 'Unified Soils Classification: CL,SC,SC-GC,CL-CH <br /> Sources for Zone I embankment soils may include the following on-site materials: <br /> 'Mud Lens <br /> °In-place overburden <br /> 'Stockpiled overburden <br /> 'Clay fill <br /> °Claystone bedrock with a liquid limit of less than 50 <br /> 'Select zones of miscellaneous fill <br /> The material shall be obtained from required excavations,borrow areas,or stockpiles. The soils <br /> shall be free of any deleterious materials,including rocks larger than 5",as specified by the <br /> Design Engineer. Oversize rock fragments shall be wasted as approved by the Design Engineer or <br /> stockpiled for use in other zones when found to be acceptable to the Design Engineer. <br /> B. Embankment Zone 1B <br /> Zone I will be constructed principally of material meeting Zone I requirements or compacted <br /> clayey sand soils meeting the following criteria: <br /> 'Between 18 to 55%passing the No.200 sieve <br /> 'No more than 60%retained on the No.4 sieve <br /> 'Unified Soils Classification: CL, SC,CL-SC,GC,SC-GC,SM-SC,GM,GM-GC <br /> 6/10 Section 02290-Page 1 of 6 <br />