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FHWA Urban Drainage Design Program, HY-22 <br />HYDRAULIC PARAMETERS OF OPEN CHANNELS <br />Circular X-Section <br />Date: 10/01/2009 <br />Project No. :Permit No. M-1983-176 Amendment AM-04 <br />Project Name.:Speer Pit Perimeter Drain <br />Computed by :Allen Sorenson Colorado DBMS <br />Project Description <br />Calculate Flow Capacity of Proposed Perimeter Drain <br />INPUT PARAMETERS <br />1. Pipe Slope (ft/ft) 0.0015 <br />2. Pipe Diameter (in) 12.0 <br />3. Manning's Coefficient 0.013 <br />4. Discharge (cfs) 1.380 <br />OUTPUT RESULTS <br />Full Flow Conditions <br />Depth of Flow (ft) 1.00 <br />Velocity (ft/sec) 1.76