2022-06-24_PERMIT FILE - C1980007 (2)

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_ • Tamping rollers shall be used for compacting the earth fill. The rollers shall be equipped with tamping feet with one tamping foot per each 100 square inch of drum surface. The roller, when fully loaded shall not be less than 4000 pounds per foot of drum length. During the rolling operation the Contractor should keep the spaces between the tamping feet clear of materials which would impair the effectiveness of the tamping rollers and feet. When each layer of material has been conditioned to have the required moisture, as provided herein, it shall be compacted by passing the tamping roller, as specified above, over it approximately twelve times; but not less than required to obtain 95% of Standard Proctor Density. All backfilling against natural faces shall be compacted to 100% of the Standard Proctor Density. D. Moisture Control The water content of the earth fill material prior to and during compaction shall be distributed uniformly throughout each layer of the material The allowable ranges of placement water content are based on design considera- tions. In general, the placement content will be required to be maintained between 2% below and 2% above the Proctor Laboratory Standard Optimum Condition. This standard optimum water content is defined as, "that water content which will result in a maximum dry unit weight of the soil when subject to the Proctor Compaction Test". ~• 3,03 Ground Water A. Where borings or test pits have been taken and are-noted on the plans, the elevation of the ground water, when encountered, is noted. This data is given for general information only and the Contractor should satisfy himself as to the condition of the ground water prior to the construction. When ground water is encountered in the construction or excavation, the Contractor shall provide for dewatering as required to provide for stability and firmness of the foundation below static water level Such lowered water level shall be maintained until such time as the work is sufficiently advanced to be secure from damage from wetting. In areas where structural backfill or compacted embankment is required, the excavation shall be free of water prior to start of backfill unless, in the opinion of the Engineer, the backfill material is sufficiently granular to allow consolidation by puddling. 3.04 Opencut Excavation A. General All opencut excavations shall be performed in accordance with this section to the lines and grades and dimensions shown on the Drawing or established by the Engineer. During the progress of the work it may be found necessary or desirable to vary the slopes or the dimensions of the excavations from those specified herein. • 02200-8