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not substantially reduced; (iv) along streams, existing shading of water surfaces is preserved; and (v) these provisions are not applicable to the removal of trees, limbs, or branches that ire dead, diseased, or pose safetY hazards. 2. Topographic Alterations/Grading and Filling. a. Grading and filling and excavations necessary for the construction of structures, and driveways under validly issued construction . permits for these facilities do not require the issuance of a separate grading and filling permit However, a grading and filling permit will be required for the movement of more than twenty. (20) cubic yards of material within 75 feet of a lake and within 50 feet of Clearwater Creek; and b. The following considerations and conditions must be adhered to during the issuance of construction permits, grading and filling permits, conditional use permits, variances and subdivision approvals: (i) Grading or filling in any wetland must have a permit from the Rice Creek Watershed District (ii) Alterations must be designed and conducted in a manner that ensures only the smallest amount of bare ground is exposed for the shortest time possible; (iii) Mulches or similar materials must be used, where necessary, for temporary bare soil coverage, and a permanent vegetation cover must be established as soon as possible; (iv) Methods to minimize soil erosion and to trap sediments before they reach any surface water feature must be used; (v) Altered areas must be stabilized to acceptable erosion control standards consistent with the field office technical guides of the local soil and water conservation districts and the United States Department of Agriculture, Natural Resource Conservation Service (NRCS); (vi) Fill or excavated material must not be placed in a manner that creates an unstable slope; 40 i.