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<br />10. The maximum slope other than the working face shall be sloped on all sides no steeper than a <br />rate of 2 foot horizontal to 1 foot vertical. In no case shall the slope of the working face be <br />left unattended with a slope greater than 2 feet horizontal to 1 foot vertical. When mining <br />operations are anticipated to be discontinued for an interval greater than two working days, <br />the slopes shall be flattened to a grade no steeper than 4 feet horizontal to 1 foot vertical. <br />Final slopes shall be consistent with the plan submitted and shall be no steeper than 12 feet <br />horizontal to 1 foot vertical. <br /> <br />11. Prior to commencing any grading operations, a cash escrow or letter of credit approved as to <br />form by the City in the amount of Ten Thousand Dollars and no cents ($10,000.00) shall be <br />deposited with the City. This financial guarantee may be used by the City to pay for the cost <br />and expense of repairing any public right of ways or regrading and stabilizing eroded areas <br />due to the grading operation, pay for any cost associated in administering the requirements of <br />this Chapter of the City Code, and to pay for any restoration of the worksite not properly <br />restored upon completion. The Permit Holder agrees to permit access to the property by the <br />City to facilitate restoration, if necessary. <br /> <br />12. The Permit Holder shall implement sediment and erosion control practices. No grading <br />activity shall occur within twenty-five (25) feet of a property line unless silt fence is placed <br />along the property line to prevent sediment from washing onto the adjoining property. Any <br />erosion which causes gullies of greater than one (1) foot within twenty-five (25) feet of a <br />property line shall be regraded within forty-eight (48) hours of the precipitation event that <br />caused the erosion. <br /> <br />13. There shall be no stockpiling of graded materials, other than the topsoil on a temporary basis <br />in the locations specified in the application submittals, allowed within the boundaries of the <br />Subject Property. <br /> <br />14. The permit holder shall file with the City a liability insurance policy or certificate of such <br />insurance acceptable to the City and issued by an insurance company authorized to do <br />business in the State of Minnesota. <br /> <br />a. The policy shall insure the permit holder for the sum of at least $300,000 for injury to one <br />person and $500,000 for one accident, and at least $1,100,009 property damage. <br /> <br />b. Said policy shall be for the full period of the permit and shall provide for the giving of 10 <br />days prior notice to the City by registered mail of termination, cancellation or amendment <br />of the policy. <br /> <br />c. In the event said policy is terminated for any reason, the permit shall be automatically <br />suspended upon the day the policy terminates unless a new policy complying with this <br />item is obtained and filed with the City prior to the termination of the policy in force. <br /> <br />15. The maximum noise level at the perimeter of the worksite shall be within the limits set by the <br />Minnesota Pollution Control Agency and the Environmental Protection Agency of the United <br />States. <br /> <br />t;3 <br />