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Horizon Elementary School Portables 5/10/2019 <br /> Conveyance Analysis Spreadsheet <br /> Mannings Plan Total Tributary Tributary Qtrib <br /> Pipe Run Size Qfull Tributary Basins Tributary Grass %Full <br /> N Slope Area Impervious (WWHM,100-yr,15-min) <br /> (inches) (fr/ft) (cis) (oc) (oc) (ac) (cls) <br /> 6-inch Pipe to covey roof runoff 6 0.011 0.0100 0.66 Portable Roof 0.046 0.046 0.000 0.07 11% <br />