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• DESIGN PARAMETERS <br />SEDIMENTATION PONDS <br />Parameter <br />Area (Acres) - Disturbed Actual <br />Area (Acres) - Undisturbed Actual <br />Curve Number - Disturbed Area 90 <br />Curve Number - Undisturbed Area 59 <br />Curve Number - Weighted (Where appropriate) Calculated <br />Drainage Basin <br />Time of Concentration Calculated <br />Muskingum's Routing Parameters Calculated <br />Precipitation <br />• Frequency Duration 25-Year, 24-Hour <br />(Inches) 2.0 <br />Frequency Duration 10-Year, 24-Hour <br />(Inches) 1.1 <br />• <br />23-54 <br />