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over the entire width and not concentrated in narrow <br /> tracks . It is the intent to secure a uniformly graded, <br /> dense, watertight dike. <br /> 2 . The density of the upper 6 inches of subgrade and of <br /> each layer of fill shall be checked by the Engineer <br /> after each layer has been compacted. Field density tests <br /> shall be used to check the compaction of the fill <br /> materials . Sufficient tests shall be made on each layer <br /> by the Engineer to assure adequate compaction throughout <br /> the entire area . If the dry densities are not <br /> satisfactory , the Contractor will be required to <br /> increase the weight of the roller or the number of <br /> passes as required to produce the specified densities. <br /> 3. The finished surface shall be made reasonably smooth and <br /> free from irregular surface changes , and to the <br /> dimension shown on the plans. <br /> 3. 05 TRENCH EXCAVATION AND BEDDING <br /> A. General <br /> 1. Excavation for all trenches shall be made to the depth <br /> required for the installation of pipelines and conduits <br /> at the grades indicated on the Drawings . Trench <br /> excavation shall comprise and include the satisfactory <br /> loosening , removing , loading , transporting , depositing , <br /> and compaction in the final location all materials , wet <br /> and dry , necessary to be removed for purposes of <br /> construction; the furnishing, placing , and removing of <br /> all sheeting and bracing ; all pumping , draining , and <br /> handling of water encountered in the excavations ; and <br /> the supporting of structures above and below ground. <br /> B. Excavation <br /> 1. All piping and conduits shall be installed in excavated <br /> open trenches. The bottom of trenches shall be bedding <br /> material, as specified herein. <br /> 2. The trench shall be excavated by machinery to just below <br /> the required subgrade provided that the bottom of the <br /> trench does not vary from the required subgrade by more <br /> than 0 . 2 feet , and backfilled to grade with bedding <br /> material. <br /> 3 . Rock shall be removed to a minimum 8 inch clearance <br /> around the bottom and sides of piping and conduits and <br /> backfilled with bedding material. <br /> 4 . During construction , excavation and filling shall be <br /> i <br /> i <br /> EARTHWORK <br /> 02200-6 <br />