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4 = ' Transit Mix Concrete Co. <br /> observed between the shallow uniform flow (sheet flow) and the channel flow that occurs <br /> in small streams. No additional response to this adequacy issue is necessary. <br /> Response: No further response is necessary. <br /> 26)Comment: 100-foot horizontal and 1-foot vertical offsets for mining activities... The <br /> response is adequate. <br /> Response: No further response is necessary. <br /> NEW COMMENTS <br /> 27)Comment: Page G-18,Table G-5. There appears to be a discrepancy between a sediment <br /> pond label in Table G-5 when compared to the Mining Phase figures(Figures G-6x through <br /> G-12) and the SEDCAD sediment pond sizing model. Table G-5 lists "FI-DET-1" that <br /> cannot be found on the figures,nor in the SEDCAD model,but it has the same contributing <br /> area (149.13 acres) as the sediment pond labeled "P-DET-1" on Figure G-6A and in the <br /> SEDCAD model. Please correct Table G-5 to be consistent with the figures and SEDCAD <br /> model labels. <br /> Response: This sediment detention basin has been labeled P-DET-1 in Table G-5 to <br /> match the figures and SEDCAD reports. <br /> 28)Comment: Figures G-6A, B & C. <br /> a. The former Figure 6 has been converted from one drawing to three which provide <br /> a great deal more hydrologic and stormwater management information. However, <br /> portions of the drawings are difficult to differentiate the different kinds of <br /> information and the lack of major contour labels and arrows indicating direction of <br /> flow make it difficult to interpret the intent in some areas. For example, it is <br /> difficult to determine which subbasins contribute to which sediment ponds. Please <br /> provide major contour labels and channel/ditch flow direction arrows. The <br /> Division suggests using different colors to differentiate undisturbed subbasins(and <br /> their culverts and/or ditches) from affected area subbasins that have runoff <br /> intercepted and directed to sediment ponds. In this case, it would be helpful if <br /> affected area subbasins and their labels were the same color. <br /> Response: Figures G-6A, B, and C have been revised to include flow direction <br /> arrows along the ditches. The ditches are also shown using blue for downdrain <br /> ditches and cyan for clean water ditches. The total watershed contributing to each <br /> sediment detention basin is also included with green boundaries. <br /> b. On both Figures G-613 and C,there are two rational method subbasins labeled"F 1". <br /> Both have 5.30 acres, and 0.46 and 0.60 runoff coefficients for the 10- and 100- <br /> year events. Please correct the drawings. <br /> Hitch Rack Ranch Quarry Permit Application M-2016-010 <br /> September 15, 2016 8 <br />