WebPipe Diameter (inches) Use this calculator to compute the required pipe size for a given area and % grade. Smooth Interior Pipe? Yes No Area Drained: Acres: % Grade* *%Grade is the feet of fall per 100 feet of length. *Use commercially available size equal to or larger than size shown. WebDetermining the proper size (diameter) culvert requires: 1) estimating the peak dis- charge of streamflow which would occur at each stream crossing during the 100-year flood, and …
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Culvert Sizing - North Carolina Forest Service
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