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Fork of Dutch Creek to be used as access to the tunnel face-up <br /> and yard area. A multi-plate pipe culvert with a cross-sectional <br /> area of 158 square feet has been installed in the main creek to <br /> gain access to the permanent tunnel spoil disposal area. <br /> Water collected above the rock disposal area will .be diverted <br /> around it to the sediment ponds by a 2800 foot long perimeter <br /> diversion ditch system. <br /> The water control structures associated with the rock tunnel <br /> project are depicted on Exhibits II-B-App .7 Att . 4-1 & 2 found <br /> in map jackets at the rear of this Volume . The sedimentation <br /> pond calculations and portal and yard area cross-sections are <br /> covered in Attachment 4 to this Appendix(II-B-App.7-Att .4) . <br /> F. Coal Refuse Facility Drainage Control Plan <br /> This drainage control plan was accomplished by Geo-Hydro <br /> Consulting Company . Most of the design data can be found on the <br /> ten charts that are in map jackets at the rear of Volume 2 and <br /> lab 1 ed Exhibits II-B-App .5-A-1 thru 14 . Additional design <br /> criteria is covered in Attachment 5 to this Appendix. <br /> G. Sediment Pond Design Certifications and Surveys <br /> The certifications are contained in Attachment 6 to this <br /> Appendix. The "as built" survey maps are contained in map <br /> jackets at the rear of this Volume. <br /> 4 <br />