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1F; f' *j— 11 \ 111.111 ; nl <br />.. .,... <br />• <br />ILLUSTRATION 7 <br />"D" PORTAL AREA SEDI� POW <br />AND DI:'ERSION DITCH <br />DESIGN CALCULATION'S <br />Revised January 1981 <br />L J <br />RECEIVED <br />JA IV 21 <br />C MI N E D <br />DtA OF NON -CON) <br />NAIUR'U kEYOURCES <br />C � <br />J <br />