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� <br /> DRAINAGE <br /> 10. As shown in the Location Plan, the mining area is surrounded by higher ground on the <br /> northern, western and southern perimeter. <br /> 11. Existing drainage is inward to the center of the area then east to discharge into a wetland <br /> azea in and along the Illinois Central Gulf Railroad. During periods of high rainfall the <br /> wetland will overflow direct to the Sangamon River. <br /> 12. Plans for the development of the site include the installation of 3 feet high berms on the <br /> northern and southern boundaries as shown in the Reclamation Plan. The purpose of <br /> these berms is to maintain the present drainage system by diverting run off to the wetland <br /> area and away from the finished mining excavation. <br /> � 13. Almost all of the ro ert f r whi h i 1 i r li <br /> p p y o c spec a use s equested es within the 100 year <br /> flood plain elevation of 609. During the life of the operation a loss in flood cross section <br /> area of 90 square feet approximately will occur. On completion of mining, a gain in <br /> flood cross section area of 5030 square feet will be achieved as shown in the Mine Plan. <br /> 14. Water level in the finished mining excavation is anticipated to be 589 U. S. G. S. <br />' elevation. All pumping will be closed circuit and no discharge is planned from the <br /> property. <br /> � <br /> 3. <br />