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Recipient <br />Page 2 of 2 <br />Date <br />acre feet. (See page 4 in the proposed SEDCAD run for the 10 -year storm.) <br />7. Regarding Ditch C-9, it appears that the left sideslope was entered incorrectly. Should it be 2:1? (See <br />page 7 in the proposed SEDCAD run for the 10 -year storm.) <br />8. Regarding Page 10 in the SEDCAD run for the 10 -year storm, please explain why the dead space <br />increased to 20% from 0% with this submittal. <br />9. Regarding Page 11 in the SEDCAD run for the 10 -year storm, please explain why the trap efficiency <br />increased to 66% from 0% with this submittal. <br />10. Regarding Page 4 in the SEDCAD run for the 25 -year storm, please explain why the total runoff <br />volume out of structure #2 increased significantly while the peal-, discharge decreased significantly <br />with this submittal. <br />Please contact me if you need additional information regarding the Division's concerns. <br />Sincerely, <br />Janet H. Binns <br />Environmental Protection Specialist III <br />Cell Phone: 970-688-0626 <br />CC: Chris Gilbreath, Tri-State Generation and Transmission Assoc. Inc. <br />P.O. Box 33695, Denver, CO 80233 <br />