02-11-1985 Council Packet - Laserfiche WebLink

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Excess Common Channel Excavation shall he deposited as spoil banks adjacent to the excavation. Where the excavation is a channel change, the excess material shall he used to fill the old channel, so far as is practical. Spoil hanks shall be not less than 4 feet from the excavation, shall be neatly shaped and shall be provided with sufficient openings to permit natural drain- age from the adjacent land. No mechanical compaction of spoil banks and fill in abandoned channel, the topsoil in the excavation shall he spread on the top of the fill. 2105.3.5. Placing Embankments; Excavations below subgrade shall be back - filled with selected soil or sand gravel material as specified in the con- tract. Embankment material shall he deposited and spread in relatively uni- form layers approximately parallel to the profile grade and extending over the full width of the embankment. Topsoil may not he used as fill. All topsoil shall be placed and respread on the boulevards and backslopes after completion of the grading. 2105.3.6. Compacting Embankments: Roadway embankments shall be compacted by the method hereinafter described as "Ordinary Compaction". In the "Ordinary Compaction" method, the embankment material shall be deposit- ed and spread in uniform layers approximately parallel to the finish grade and extending over the full width of the embankment. The layers in the upper 3 feet of the embankment shall not be more: than 8 inches thick (loose measure- ment) and those in the lower portion shall not be more than 12 inches thick. Each laver shall be compacted with a tamping roller which has a weight of not less than 200 pounds per square inch of tamping surface on all the tamping feet in one row approximately parallel to the axis of the roller. Pneumatic - tired rollers having a weight of not less than 200 pounds per inch of overall rolling width and vibratory compactors may be used provided they produce a density equal to that which would he obtained with a tamping roller. In any case, compaction shall continue until there is no evidence of further com- paction. Each layer of embankment shall he leveled prior to and in conjunction with compaction operations to insure uniform compaction over the entire area. A crown shall be maintained or the roadway to permit free surface drainage of embankment areas during the grading operation and until final acceptance. 2105.4. METHOD OF MEASUREMENT: Excavation items will be measured by volume of the material in its original position. Volume will be computed by the average end araa method. TnpaoiI stripping in excavation areas will be cross -sectioned along with Common Excavation. Stripping in embankment areas will be cross -sectioned after completion of the stripping operation. The qualiry for stripping in embankment areas 'h;iwn on the plans will he used for pay quantities, unless there is a «ubstantial change in Mans. 210'5 3 9!a-4--00?4A Copvrisht 1984 R�nAstr�+n, Rosene, Anderlik 4 Associates. Inc.