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m. The ditch terminology across the design packet and text is unclear. Some terminology <br />references "upper" and " lower" ditches, other references "north and "south" ditches. <br />Please coordinate terminology in the document and label all ditches ina n legible sized <br />font. <br />n. The overall site plan drawing is unclear, there is an inset with its own scale and north <br />arrow that appears to be the outlet of cell 4. Please label what this inset references, and <br />locate the structure on a map <br />Please clarify: <br />o. where ditches discharge (provide a map that explicitly indicates channel origin and <br />ending for all ditches) <br />p. Please quantify the volume of water to be pipped into the MN6 pond from the 4 cell <br />passive treatment system. <br />The Design Details page shows numbered inset drawings. <br />q. For inset drawing #1 "Vortex stones" are called out but not shown. Please explain. <br />r. For inset drawing #2 it appears to DRMS that weep holes may be needed, particularly at <br />the discharge end of the cascade structure. Please consider adding weep holes and if not <br />added, please explain why not. <br />s. What criteria were used in sizing the stones for the cascade. <br />t. The cascade must be well tied in with the bank. This aspect of the engineering is not <br />indicated in the drawings. Please show on all drawings how the cascade will be <br />stabelized into the banks. <br />Maps reference North and South Ditches and SedCAD references upper and lower diversion ditches or <br />ditches as per their structure number. <br />u. Please update the font on all maps so that it is: <br />o Not less than size 12 in any tables embedded in maps <br />o All font is right side up when reading the map in its north orientation <br />o All font size is legible — must be at least size 10 in maps <br />11. Section 4.6 of proposed Exhibit 49EE contains a discussion of the basis for the design of the <br />North and South Diversion Ditches. The diversions are depicted in the cross sections provided in <br />Appendix C to Exhibit 49EE. In accordance with Rule 4.05.3(7) the diversion design shall <br />incorporate the following: <br />a. Channel lining, including channel riprap, shall be designed using standard engineering <br />practices to pass safely the design velocities. <br />DRMS Response December 2018 <br />Rip rap appears adequately sized. <br />b. Freeboard shall be no less than .3 feet. <br />The discussion in section 4.6 of Exhibit 49EE and the cross-sections in Appendix C do not show <br />how the designs meet the above requirements. Please revise the design to incorporate these <br />requirements. <br />DRMS Response 28 November 2018 <br />Freeboard for each of the ditches exceedes .3 foot as per above mentioned rule. <br />