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<br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />SECTION 02219 <br /> <br />manner, including maintaining surfaces free of weeds or other <br />vegetation, until final completion and acceptance of all the <br />work under the contract. <br /> <br />6. The contractor shall construct separate portions of the <br />embankment below original ground surface, subject to the <br />approval of the Engineer. Above original ground surface, <br />longitudinal bonding surfaces (surfaces parallel to the <br />centerl i ne crest of em,bankment) ",i 11 not be permi t ted. <br /> <br />B. <br /> <br />Placing. <br /> <br />1. The distribution and gradation of the materials <br />throughout the earthfill shall be such that the fill will <br />be free from lenses, pockets, streaks, or layers of <br />material differing substantially in texture, gradation, or <br />moisture from the surrounding material. The combined <br />excavation and placing operations shall be such that the <br />materials, when compacted in the earthfill, will be <br />blended to secure the specified practicable degree of <br />compaction, stability and gradation. Successive loads of <br />material shall be dumped on the earthfill so as to produce <br />the best distribution of the material, subject to the <br />approval of the Engineer and for this purpose the Engineer <br />may designate the location~ in the earthfill where the <br />individual loads shall be deposited. <br /> <br />2. The material shall be placed in the earthfill in continuous, <br />approximately horizontal layers not more than 6 inches in <br />thickness after being compa,ted. If, in the opinion of the <br />Engineer, the surface of the prepared foundation on the <br />compacted surface of any layer of earthfill is too dry or smooth <br />to bond properly with the lsyer of material to be placed <br />thereon, it shall be moistened and/or worked with harrow, <br />scarifier, or other suitable equipment, in an approved manner to <br />a sufficient depth to provide a satisfactory bonding surface <br />before the next succeeding layer of earthfill material is <br />placed. If, in the opinion of the Engineer, the compacted surface <br />of any layer of the earthfill in place is too wet for proper <br />compaction of the layer of earthfill material to be placed <br />thereon, it shall be removed; allowed to dry; or be worked with <br />harrow, scarifier, or other suitable equipment to reduce the <br />moisture content to the required amount; and then it shall be <br />recompacted befor-e the nex t succeedi ng 1 ayer of earthf ill <br />material is placed. <br /> <br />3.02 FOUNDATION PREPARATION <br /> <br />A. No material shall be placed in any portion of the dam <br />embankment until the foundation for each section has been <br />unwatered, stripped, suitably prepared, and has been <br />approved by the Engineer. <br /> <br />B. All cavities, depressions, and irregularities, either <br />e,:isting or resulting from removal of rock fragments found <br /> <br />36 <br />