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} <br /> Substationl - No. 1 portal. <br /> In review of our previous submittal, the Division commented that: <br /> 1. Additional and supporting documentation for the small <br /> area designations should be paginated and otherwise <br /> designated for inclusion in the permit document. <br /> MCR Response: Please see Attachment 1. <br /> 2. Proposed sediment control measures should be depicted on <br /> site diagrams. <br /> MCR Response: The sediment control measures are indicated on the <br /> enclosed site diagr ms by a cross-hatch design, and these are <br /> included with Attachment 1 for insertion in the permit. <br /> 3 . Specifications as to size for total containment berms <br /> should be included, where these are the proposed sediment <br /> control measures. Total containment berms may not be <br /> practical in some areas, such as the No. 1 Mine south <br /> portal and '�the No. 3 Mine fan area. <br /> MCR Response: <br /> Previously, berms had been placed as the primary sediment control <br /> measure at the No. 1 Mine Substation, the No. 3 Mine fan area, the <br /> No. 1 Mine south portal, and the 016 topsoil pile. <br /> The No. 1 Mine south portal, which consists of rock and does not <br /> contribute sediment, does not require sediment control measures. <br /> After further consideration, Mid-Continent believes alternative <br /> means would be more practical at the No. 3 Mine fan area and the <br /> No. 1 Mine substation. Both of these small areas are flat, and <br /> occupied largely byl concrete slabs, which do not contribute <br /> sediment. <br /> At the No. 3 Mine fan area, Mid-Continent proposes to vegetate the <br /> area(s) of bare ground found between the concrete slabs as a means <br /> of sediment control . The areas to be vegetated are indicated on <br /> the enclosed site diagrams by a cross-hatch pattern. <br /> A different approach is required for the No. 1 Mine substation, as <br /> it is an active power center. For safety reasons, no-one is <br /> allowed inside the area while power is on. As this is the source of <br /> electricity for the fans which ventilate the mine, the power is <br /> required on at all times. Also, no vegetation is allowed within <br /> this area as it could be a potential fire danger. Mid-Continent <br /> proposes to place a 6' deep gravel border outside the power center. <br /> The area to be graveled is indicated by a cross-hatch pattern on <br /> the enclosed diagram. <br /> Mid-Continent 2 TR-20 <br />