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1. Provide a high level of protection from flows stemming from a 100-year storm centered on <br /> Green Mountain for the Brookfield Development(Solterra) along the south and east side of the <br /> mine <br /> 2. Maintain the operational flexibility for General Shale to operate the mine in an economically <br /> viable manner <br /> 3. Provide a solution for General Shale Corporate that is cost effective <br /> Assumptions <br /> Dedicated Detention Storage <br /> There will be no dedicated detention storage. Said storage interferes with the ability of General Shale to <br /> mind the assets located underneath. <br /> Outer Ditch Characteristics <br /> Alignment <br /> There are areas along the south and east South Chieftain Mine property line where Brookfield has <br /> indicated they are using the South Chieftain Property Mine property for their drainage. The area along <br /> the eastern property line is draining to the swale in the SE corner of the South Chieftain Property. The <br /> area along the southern property line is draining to the west to the original channel that existed before <br /> the mine was constructed. <br /> Since the outer ditch corridor is to be semi-dedicated, it will be located as far and east as possible yet <br /> respecting the areas where Brookfield has indicated they wish to use South Chieftain property as <br /> indicated in the paragraph above. This outer ditch will outlet into the original channel that existed <br /> before the mine was constructed. The corridor for this location is shown on design sheets C-2 and C-3. <br /> This location provides the protection that Brookfield is seeking and the operational flexibility that <br /> General Shale needs to operate the mine economically efficiently. The rest of the mine in the same <br /> drainage area and located above this alignment either drains into the existing outer channel or inner <br /> channel constructed by General Shale. The contribution to the outer channel has been accounted for in <br /> the Hydrology and Hydraulics sections above. Contributions to the inner channel currently drain and <br /> will continued to drain to the pit in the center of the mine. Water from said pit is pumped to the original <br /> channel that existed before the mine was constructed. <br /> 8 07/30/2017 <br />