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<br />6. On sheet 5 of 5 of Drawing 2.05-M4, the natural stream symbol located in the <br />northwest corner of the IIW gob pile is shown to pass through the clean water <br />diversion ditch and onto the gob pile. Please revise the drawing to show that the <br />natural stream stops at the diversion ditch. <br />7. On sheet 5 of 5 of Drawing 2.05-M4, the east end of the IIW upper haul road <br />ditch is shown to travel uphill before it empties into IIW culvert 1. Please revise <br />the positions of these two ditch and culvert symbols shown on Drawing 2.05-M4, <br />sheet 5 of 5. <br />On sheet 5 of 5 of Drawing 2.05-M4, please add the permit boundary line to the <br />drawing and in the drawing legend. <br />9. On sheet S of 5 of Drawing 2.OS-M4, please add drainage symbols for the bench <br />ditches located on the IIW gob pile. <br />10. Because of the proximity of the railroad line to the Pond E concrete dam, the <br />Division believes that Pond E should be classified as a Class B dam, as defined in <br />Technical Release No. 60 (TR60) of the U.S. Department of Agriculture, October <br />1985. As required in Rules 4.05.9(2)(d) and 4.OS.9(10), please provide Sedcad <br />designs that demonstrate that the emergency spillway of Pond E can pass the <br />precipitation event, with the required freeboazd, as defined in Table 2-S of TR60. <br />1 I. Because the height of the Pond E dam, as measured from the bottom of the <br />channel up to the emergency spillway invert, is ~Sfeet, Rule 4.05.9(3) requires <br />that the pond design be in compliance with C.R.S. 37-87-105. Please provide <br />proper documentation that the designs for Pond E have been filed at and approved <br />by the office of the state engineer. <br />12. Please demonstrate that the existing railroad culvert just below the Pond E dam <br />can pass the design precipitation event outflow from the emergency spillway. <br />cc: Sandy Brown <br />Byron Walker <br />c: /word/elkcreek/tr43 adegmemo 1 <br />