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March 19, 2018 <br />Page 2 <br />3. There appears to bean error on proposed Exhibit 7-23B, Table]. The slope listed on <br />Table 1 for Ditch D-1 is 24.2%. However, 21% was used in the SEDCAD model as well <br />as reflected in Exhibit 7, Item 23, Figure B-2. Please update Exhibit 7-23B, Table 1 to <br />reflected Ditch D-1 's correct slope. <br />Response: Exhibit 7-23B, Table 1 has been updated with the correct slope for the D-1 <br />Ditch as requested. <br />4. In Exhibit 7, Item 23C, SEDCAD demonstration titled "Temporary Spoil Pile West Side <br />Model " (both 10 yr. — 24 hr. and 25 yr. - 24 hr.), the area directly above the Sidehill <br />Pond (Structure 6) isn't taken into consideration with the Immediate Contributing Area. <br />Please provide the Division on explanation for this or update the SEDCAD model to <br />reflect this area. <br />Response: As discussed over the telephone with the Division on March 15, 2018, the <br />area directly above the Sidehill Pond (8.5 acres) was included in the SEDCAD model. A <br />decision had to be made on the routing of that sub watershed and it was routed to <br />Structure #8 as shown on the sub watershed hydrology detail sheet. Structure #8 is then <br />routed to Structure #6 which is the Sidehill Pond. Therefore, this area has been <br />accounted for accordingly. <br />5. Asper the discussion between Colowyo and the Division as well as proposed text in <br />Exhibit 7, Item 23, Part D, the Division was under the understanding that given the very <br />temporary nature of the proposed access roads, that graveling the roads were <br />unnecessary and would not be required. However, when reviewing Exhibit 7-23 Figure <br />D4, the designs show the temporary access roads as graveled. Please update Exhibit 7- <br />23 Figure D4. <br />Response: Colowyo fully agrees with the Division and has updated Exhibit 7-23 Figure <br />D4 as requested. <br />6. In proposed Exhibit 13C, there appears to be table numbering duplication as well <br />missing table numbers associated with the exhibit. Table 13C-13 has been associated <br />with two different tables and Table 13C-24 has been associated with three different <br />tables. Please provide a reasoning for this or update the Table numbering. <br />Response: The numbering issue for all tables presented in Exhibit 13C has been <br />corrected, and all citations to the tables has also been corrected. <br />7. Table 13C-3 has been excluded from Exhibit 13C. Discussion on page 3 states Tables <br />13C-1 through 13C-6present required items and associated volumetrics to reclaim the <br />Collom Haul Road. Not included in this is Table 13C-7 Revegetation Requirements for <br />the Collom Haul Road. It appears to the Division that a numbering shift may have <br />AN EQUAL OPPORIIN ffY/AFFNWATMAMONE1E LOYER <br />A Touchstone EneWCooperative <br />