Laserfiche WebLink
recompacted before the next succeeding layer of earthfill material is placed. <br />After a layer of earthfill has been dumped and spread, it shall be disked to break up <br />and blend the earthfill materials. Smooth, hard surfaces and deep ruts in the surface <br />of earthfill resulting from the passage of construction equipment during placing <br />operations shall be removed by disking or scarifying. Disking to obtain a uniform <br />distribution of water content throughout the uncompacted layer as detailed below, <br />may be substituted for disking required to break up and blend the earthfill materials. <br />Disking shall be performed with a heavy disk plow to the full depth of the <br />uncompacted layer. The diameter of the disk shall not be less than 24 inches at any <br />time during the disking operations. If one pass of the disk does not accomplish the <br />breaking up and blending of the earthfill, additional passes of the disk may be <br />required. <br />K. Prior to placement of earthfill on or against the surfaces of previously placed and <br />compacted portions of the liner embankment, all previously placed and compacted <br />materials which have become soft or loose due to exposure to weather, which contain <br />erosion channels or cracks, or which are excessively dry, shall be reworked by <br />removing and replacing, or by recompacting as directed by the Engineer. The <br />replaced materials shall be compacted as required by these Specifications for the type <br />of material being compacted. Damaged or loosened surfaces shall be recompacted as <br />originally specified for the material being recompacted. <br />L. At all times during the dumping and spreading processes, the Contractor shall <br />maintain a personnel force adequate to remove all roots and debris from all <br />embankment materials and all cobbles of greater than 2 inches in maximum <br />dimension from impervious Zone I materials. Cobbles so removed and the roots and <br />debris shall be removed from the embankment and disposed of in an approved <br />manner. The entire surface of any section of the embankment under construction <br />shall be maintained in such condition that construction equipment can travel on any <br />part of any one section. Ruts in the surface of any layer shall be removed by <br />scarifying before placing and compacting additional material. <br />M. WATER CONTENT AND DENSITY CONTROL <br />1. General: <br />a. Each layer of the earthfill material on the embankment shall be <br />compacted by a sufficient number of passes, but no less than 2 <br />complete passes, to achieve the specified percent compaction shown <br />below, which shall be the minimum compaction effort to be <br />performed by the Contractor. One pass is defined as the passing of <br />both drums of a double drum tamping foot roller over the material to <br />be compacted. During compaction, the water content of the earthfill <br />materials shall be such that the water content and dry density of the <br />compacted earthfill will be maintained within the control limits <br />specified below. The results of testing specially compacted earthfill <br />will not be combined with the.results of testing earthfill compacted <br />by tamping rollers. <br />Zone I & Zone II fill: 98% maximum dry density. <br />NM Pit #1 Reservoir Liner - Technical Specifications Fill <br />312323 -7 <br />