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"Disturbed" in both the 10 Yr. — 24 Hr. and the 25 Yr. — 24 Hr. As shown in Figure 1, the curved <br /> number for Disturbed is 80 while the Subwatershed Hydrology Detail used a CN of 74.Please provide <br /> the Division with an updated active mining hydrologic case for the Section 16 hydrology models with <br /> the corrected CN. <br /> If you have any questions, feel free to contact me. <br /> Sincerely, <br /> Zach Trujillo <br /> Environmental Protection Specialist <br /> (303) 866-3567 ext. 8164 <br /> Zach.Trujillo@state.co.us <br />