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Colowyo, C1981 -019, PR3 adequacy No. 3 14 July 22, 2011 <br />Item 23) than 14.7 acres, and it contains an undisturbed portion, which does not appear in the <br />model input table. Also, it appears that Sub - watershed #1 for Structure 10 should have a CN of <br />85, based on the map. Please review the model and revise as necessary. <br />11. Regarding Figure A -1, the following questions/comments should be addressed, and any <br />associated changes in the SEDCAD model should be made: <br />b) Why is the ditch in area A26 labeled D15? Is this a mistake? <br />The response is inadequate. The map has not heen revised. <br />CCC has resolved the concerns with this item with the August 9, 2011 submittal. <br />13. Within Exhibit 7, Item 26, on the Little Collom Pond Design Drawing, Figure 1, please address <br />the following errors: <br />1. The Area- Capacity table does not match the Elevation- Capacity - Discharge table in <br />Exhibit 7, Item 23. Please confirm which table is correct and that the contours on <br />the figure are correct and match the correct table. <br />The response is inadequate. The Area - Capacity table still does not match the <br />Elevation- Capacity- Discharge table in Exhibit 7, Item 23. <br />Rule 4.05.7 Discharee Structures <br />1. Please provide documentation that energy dissipation is not required at the downstream end of <br />the lower clear water diversion or provide the design detail. <br />The response is inadequate. The size of riprap and volume for the entire apron seem <br />appropriate, but please provide an explanation of how these values were determined. Provide <br />calculations and/or a reference to an engineering design publication. <br />The response is inadequate. Please indicate where SEDCAD inputs and results are presented <br />for the LCWD outlet apron. <br />Rule 4.05.9 Immoundments <br />Requirements Ibr impoundment embankments are enumerated in Rule 4.07.9(7), (a) thru (e). <br />The application lists some of the required details on Exhibit 7 Item 20 Figure I and in Figure <br />I I of the S &W study. There may be other locations within the application whcrc additional <br />requirements are addressed. Please provide a reference within Rule 4 Section 4.05.9 of the <br />application directing the reader to the appropriate section(s) of the application where each item <br />(a) thru (e) has been addressed. Alternatively. please revise Section 4.05.9 to incorporate the <br />requirements of Rule 4.07.9(7). <br />