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4. Determination by a professional engineer of the 100-year high water elevation before and <br /> after the project and the extent of impervious surface within the 10-year floodplain. <br /> 5. Computation by a professional engineer of cut, fill and change in water storage capacity <br /> resulting from proposed grading. <br /> 6. Soil boring results if available. <br /> 7. If not otherwise subject to the District Erosion Control Rule, an erosion control plan <br /> conforming to sections 5, Erosion Control Plan, and 9, Maintenance, of the Erosion <br /> Control Rule. <br /> 8. Any project resulting in greater than 50 cubic yards of fill is required to provide an as- <br /> built survey upon project completion which documents the location and volume of both <br /> fill and compensatory storage. <br /> MCWD DREDGING RULE <br /> 1. Site plan showing property lines, delineation of the work area, existing elevation contours <br /> of the adjacent upland area, ordinary high water elevation, and 100-year high water <br /> elevation(if available). All elevations must be reduced to NGVD (1929 datum). <br /> 2. Profile, cross sections and/or topographic contours showing existing and proposed <br /> elevations and proposed side slopes in the work area. (Topographic contours should be at <br /> intervals not greater than 1.0 foot.) <br /> 3. In the case of projects using hydraulic means of sediment removal and on-site spoil <br /> containment the applicant shall supply: <br /> a. Cross section of the proposed dike. <br /> b. Stage/storage volume relationship for the proposed spoil containment area. <br /> c. Detail of any proposed outlet structure, showing size, description and invert <br /> elevation. <br /> d. Stage/discharge relationship for any proposed outlet structure from the spoil <br /> containment area. <br /> 4. Site plan showing the locations of any proposed outlet structure and emergency overflow <br /> from the spoil containment area. <br /> 5. Site plan showing the proposed location of floating silt curtains. <br /> 6. Support data: <br /> a. Description and volume computation of material to be removed. <br /> b. Description of equipment to be used. <br /> c. Construction schedule. <br /> d. Location map of spoil containment area. <br /> e. Erosion control plan for containment area. <br /> f. Restoration plan for any proposed permanent on-site spoil containment site <br /> showing final grades, removal of control structure, and a description of how and <br /> when the site will be restored, covered, or revegetated after construction. <br /> g. Detail of any proposed floating silt curtain including specifications for the silt <br /> curtain. <br /> 7. In the case of projects where dredging: <br /> a. Might cause increased seepage or result in subsurface drainage, or <br /> b. Will remove sediment to eliminate a source of nutrients,pollutants, or <br /> contaminants, a minimum of two soil bearing logs extending at least two feet <br /> below the proposed work elevation shall be required. <br />