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• Inadequacy Response No. 1, Addendum to Appendix 4-B, September, <br />1986. <br />Ditch D-11 conveys the run-off from the undisturbed area into <br />culvert C-2. The design for ditch C-11 is presented on pages 4- <br />B:7. <br />Ditch D-12 conveys run-off from culvert C-6 across the reclaimed <br />mine site. The design for ditch D-12 is presented on pages 4-B: 8. <br />Collection ditch A conveys runoff from the area immediately below <br />and east of pond P-9 to the refuse pond. Collection ditch B <br />collects runoff from the area above and to the east of pond P-9. <br />The run-off from collection ditch B is directed into pond P-9. The <br />design for these ditches is presented in a section of this appendix <br />titled; Snowmass Coal Company, Collection Ditch Design, Addendum to <br />Appendix 4-B, July 10, 1989. <br />Culvert C-2 is the 18" CMP which conveys runoff under the county <br />road. It is located in reclaimed pond P-1. The design for culvert <br />C-2 is presented on page 4-B:7. <br />Culverts C-6 are the 48" CMPs which convey runoff under the county <br />road and under the site access road. The design for culvert C-6 is <br />presented on page 4-B:8. <br />• Certification <br />The calculations and information presented on the following pages, <br />4-B:3 h 4-B:15, was prepared by me during the month of <br />Octo~~~00 1019h4lSand the information presented is true and correct to <br />the.~~~t•b'•f~Sn~~aiowledae and belief. <br />~* ~ 1`JL3}f Ja~le9 E. Stover, P.E. <br />~,o• Regig~~ed Professional Engineer <br />•~°'•. St~ of Colorado No. 19230 <br />.o,,, •.. .•' ~ <br />• <br />,o -~~- 9¢ <br />Date <br />4-B:2 October 1994 <br />