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• DESIGN PARAMETERS <br /> CULVERTS <br />Parameter Culvert Identification Number <br /> <br />Area (Acres) - Disturbed Actual <br />Area (Acres) - Undisturbed Actual <br />Curve Number - Disturbed 90 <br />Curve Number - Undisturbed 69 <br />Curve Number - 81 Reclaimed Area 68 <br />Curve Number - 83 Reclaimed Area 64 <br />Curve Number - 86 Reclaimed Area 72 <br />Drainage Basin Actual <br />Time of Concentration Calculated <br />Muskingum's Routing Parameters Calculated <br />_ Precipitation <br />Frequency, Duration 10-year, 24-hour <br />(Inches) 1.7 <br />Culvert <br />Design Precipitation Event 10-year, 24-hour <br />Inlet Type Projecting, Headwall <br />Shape Circular CMP <br />Calculation Method <br />Culvert Size Nomograph; U.S. Bureau of <br />Public Roads <br /> <br />23-60R Revised - August, 1991 <br />