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Tom Bird,GCC Energy, LLC <br /> Page 3 of 3 <br /> 17 July 2019 <br /> i. SEDCAD model for Treated Water <br /> i. In"Revision 5,"please add a map showing SWS areas. <br /> ii. Does Basin F drain to Reach 13 or to the East Clear Water Ditch? The <br /> SEDCAD model implies that it drains to Reach 13 (Structure#10 in the <br /> model),but Map King I-007 suggests that it drains to the CWD. <br /> iii. Please explain why bare ground with soil group D has a curve number of <br /> 77.6. Perhaps the number should be higher. <br /> 13. No additional response required. <br /> Maps <br /> 14. GCC has shown the location of the Topsoil Borrow Area on Map King I-007. Also on this map, <br /> near the Topsoil Borrow Area, GCC has extended the polygon for approved Areal Extent of <br /> Surface Disturbance beyond the Affected Area Boundary. This is not appropriate. Please extend <br /> the Affected Area or reduce the size of the Surface Disturbance polygon. Also,please <br /> explain if this is the 0.7 acre increase noted on the application form for TR-27. <br /> 15. No additional response required. <br /> 16. No additional response required. <br /> 17. No additional response required. <br /> 18. No additional response required. <br /> 19. No additional response required. <br /> If you have any questions feel free to contact me at rob.zubergstate.co.us or(303) 866-3567, extension <br /> 8113. <br /> Sincerely, <br /> Robert Zuber, P.E. <br /> Environmental Protection Specialist II <br />