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uaror� <br />'�acrFrc <br />In cut sections where the material to be excavated is solid rock, the Industry shall excavate twelve <br />inches (12 ") below the subgrade elevations as shown on the Drawings and shall replace such <br />excavated twelve inches (12 ") of solid rock with embankment material approved by the Engineer. <br />This twelve inches (12 ") of embankment shall have the moisture content adjusted and be compacted <br />to specifications (see Section 8.15), <br />8.14 EMBANKMENT - Embankments shall be constructed and compacted to the elevations and <br />grades set forth in the Drawings and as staked in the field. <br />After the required clearing and grubbing, the foundations for embankments shall be prepared by <br />scarifying the top six inch (6 ") layer of existing ground, adjusting moisture content, and compacting <br />such scarified material (see Section 8.15). <br />If the quantity of materials required for construction of embankments exceeds the quantity of <br />materials removed from excavation necessary to complete the project, additional embankment <br />material will be obtained by: <br />a) Widening cuts in the grading area. The Industry shall consult with the Engineer before <br />widening any cuts. Cuts shall be cleared and grubbed and widened in such a manner as to: <br />1.) Be at least as stable as the original cut <br />2.) Provide adequate drainage for the roadbed <br />3.) Retain the same, or lesser degree of, slope lines as original cut <br />b) Establishing borrow areas within the right -of -way, if available, or from areas outside of the <br />right -of -way, provided by the Industry, to obtain the additional embankment materials. All <br />borrow areas shall be cleared and grubbed. All imported materials shall be clean and free <br />of any contaminated and hazardous materials. Materials are to be tested at the source <br />by the Industry and approved by the Engineer prior to placement. Copies of laboratory <br />tests are to be given to the Engineer. <br />The Industry shall not place any material that is to be used in the construction of an embankment on <br />top of a frozen surface. With the prior approval of the Engineer, the Industry shall remove all layers <br />of frozen ground and frozen materials in order to prepare a proper foundation for construction of <br />embankments. Furthermore, the material being placed for embankment shall contain no frozen <br />material. <br />Wherever an embankment is placed on or against an existing embankment, the existing embankment <br />side slope will be cut in steps to tie the new embankment into the existing side slope. These steps <br />should not be over one foot (1') vertically and can not be cut until embankment material will be <br />placed immediately following the cutting of these steps. No steps will be left uncovered overnight. <br />8.15 MOISTURE AND DENSITY REQUIREMENTS - In cut sections, after cut has been <br />completed, the Industry shall scarify the six inches (6 ") of material below the top of proposed <br />subgrade, adjust moisture content and compact the scarified material to a dense and unyielding <br />condition and to a minimum of 95% (Modified Proctor) of maximurn density. After cut sections are <br />excavated to subgrade, scarified and recompacted the Engineer shall observe and approve (by <br />proof rolling or other methods) these areas before any subballast is placed. <br />28 <br />