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Each layer of the embankment will be completed, leveled and compacted before the succeeding <br />layer is placed. Testing of the adequacy of compaction of the cut zone subgrade and fill zone <br />embankment shall be by Proof Rolling, utilizing loaded mine haulage equipment as directed and <br />evaluated by the Mine Engineer. Proof Rolling shall be conducted at intervals, elevations and <br />frequencies determined by the Mine Engineer. All Proof Rolls shall be observed by the Mine <br />Engineer or designated representative. Any section of roadway subgrade, or any lift of roadway <br />embankment fill which yields excessively, in the judgment of the Mine Engineer or his <br />representative, shall be reworked utilizing one of the following standard geotechnical <br />engineering methods: <br />Excavate the soft area to the depth designated by the Mine Engineer, moisture <br />condition (wet or dry as required) the material removed, replace and recompact the <br />same material in lifts as directed by the Mine Engineer. Repeat the Proof Roll test, or <br />2. Excavate the soft area to the depth designated by the Mine Engineer, dispose of the <br />material excavated and replace it with select imported fill placed in lifts and <br />compacted as directed by the Mine Engineer. Repeat the Proof Roll test, or <br />3. Excavate the soft area to the depth designated by the Mine Engineer, dispose of the <br />material excavated and replace it with imported Pit Run Gravel placed in lifts and <br />compacted as directed by the Mine Engineer. Repeat the Proof Roll test. <br />4. The Mine Engineer may at his discretion direct that the replacement fill noted in <br />items 1, 2, & 3 above shall be placed on geotextile or geogrid where deeper <br />subsurface conditions make such action necessary and appropriate. <br />The Mine Engineer or designated representative shall prepare and maintain records of all <br />subgrade and embankment Proof Roll tests and of any remedial work undertaken as a result of <br />said Proof Roll tests. <br />The gravel structural section for mine access and haul roads shall be constructed in conformance <br />with the project plans prepared by a professional engineer. Aggregate shall be placed in lifts not <br />exceeding twelve (12") thick, moisture conditioned as needed to facilitate compaction and shall <br />be compacted by wheel rolling using mine haulage equipment. The Mine Engineer shall <br />determine the number of passes required for the compaction equipment based upon the type, <br />weight and load of the equipment and upon observation, experience and evaluation of the <br />response of the gravel being placed to repeated passage of the compaction equipment. <br />The Mine Engineer or designated representative shall prepare and maintain records of all Proof <br />Roll tests of the aggregate structural section and of any remedial work undertaken as a result of <br />Section 2.05.3(3) Page 6 Sept. 2015 (TR -11) <br />