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UNION <br />PACIFIC <br />Some existing UP embankment slopes are very steep (1.5': 1' or less). These slopes can not be <br />cleared and grubbed along with the foundation of embankment areas. These slopes must be <br />cleared in steps (see Section 8.14, last paragraph) immediately ahead of placing embankment lifts and <br />the cleared material wasted over the side of the new embankment. No steps will be left uncovered <br />overnight. <br />8.12 UNSUITABLE MATERIALS - If unsuitable materials are encountered below the foundation <br />of embankments, below subgrade elevation in excavation areas, or in excavated material to be used in <br />embankments, such materials shall be disposed of properly. <br />Unsuitable material removed from below subgrade elevation in excavation areas and from under <br />embankment foundations shall be replaced to proposed grade elevation with suitable materials, <br />compacted to specification. <br />The Engineer shall identify such unstable materials, the limits of removal, and shall approve the <br />replacement material. <br />8.13 EXCAVATION - Before excavation begins, the area shall be cleared and grubbed (see Section <br />8.11). The Industry shall perform all excavation to the elevations and grades shown on the Drawings <br />and as staked in the field. This work shall consist of excavating the material from roadbed areas, or <br />the borrow areas, and placing the material as embankment, shaping and sloping necessary for the <br />construction, preparation and completion of roadbeds and other earthwork. <br />The Industry shall excavate all materials including rock and common materials that must be removed <br />to accomplish the excavation as shown on the Drawings. All excavated materials will be used in the <br />formation of embankments, roadbeds, and other earthwork so long as such excavation material is <br />satisfactory for such use. Materials must be tested by an independent testing laboratory and /or <br />approved by the Engineer prior to placement. <br />Where excess excavation materials or unsatisfactory material exists, such materials will be disposed <br />of in areas on the Right of Way, approved by the Engineer, or off the Right of Way in a legal and <br />proper manner. Industry shall provide the Engineer with a copy of agreements made with any <br />landowner. <br />Excavation shall be done in a manner and sequence that will provide proper drainage at all times <br />No blasting will be allowed without sufficient advanced notice given to the Engineer. Ibis time will <br />permit the safe and continuous operation of the UP. <br />The Industry shall construct intercepting ditches above the cut slopes where natural ground slopes <br />toward the track (see UP Engineering Standard Drawing No. 0003). <br />After cut has been completed, the Industry shall scarify the top six inches (6 ") of material below the <br />top of proposed subgrade, adjust moisture content, and compact such scarified material (see Section <br />8.15). <br />27 <br />