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Conveyor Alignment 40 + 90' to 90 feet 1.79 <br /> 51 + 25' <br />Same 53 + 25' to ~0 feet Greater than the <br /> 55 + 25' above by analogy <br />The applicant has committed to backfilling each of the roadway and conveyor cuts to the <br />approximate original contour. <br />Road Drainage Control <br />Road drainage ditches aze designed to convey surface runoff resulting from the 10-year, <br />24-hour stone event. All culverts conducting drainage beneath road surfaces will safely <br />pass 10-yeaz, 24 hour peak flows and will be appropriately installed. In some cases, <br />dischazges from the culverts may be at velocities which aze erosive. Caze must be taken <br />at all culvert dischazge points to dissipate energy due to these high velocity dischazges. <br />Grand Valley Coal Company has installed protective devices at culvert discharge points <br />at existing operations which demonstrate little or no erosion. If the applicant continues to <br />use these measures during the proposed operation, there should be little problem with <br />erosion at discharge points. <br />The proposed road culvert installation scheme does not conform with performance <br />standazds of Rule 4.03.1(4)(e)(vi)(A) regazding culvert spacing. Adherence to these <br />spacing requirements ensures that drainage systems will not be breached and excessive <br />erosion will not result. Alternative specifications aze allowed under the provisions of <br />4.03.1(4)(e)(vi) if the applicant can demonstrate that such specifications will not result in <br />an increase in erosion. In this particulaz case, the Division would recommend the <br />installation of additional culverts, particulazly in azeas of steeper road gradients, wherever <br />a drainage crosses the road (as indicated by contour lines on a topographic map). <br />The following stipulation is therefore required: <br />Stipulation ?Jo. 16 <br />PRIOR TO CONSTRUCTION OF THE HAUL ROAD, THE APPLICANT MUST <br />PROPOSE THE INSTALLATION OF ADDITIONAL ROAD SURFACE DRAINAGE <br />CULVERT:I TO MEET THE SPACING REQUIREMENTS OF RULE <br />4.03.1(4)(e)(vi)(A). ALTERNATIVE SPECIFICATIONS MAY BE UTILIZED <br />UNDER THE PROVISIONS IN RULE 4.03.1(4)(e)(vi) IF THE APPLICANT <br />DEMONSTRATES THAT THESE SPECIFICATIONS WILL NOT RESULT IN AN <br />INCREASE [N EROSION. <br />23 <br />