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<br />:;,J\r-,.. <br /> <br />i <br />~ <br />'C' <br />;-..1. <br />w; ~ <br />f; <br /> <br />10-04. Reinforced Concrete Box Culverts. The culverts through the <br />levees were designed primarily through the use of an indeterminant <br />frame analysis computer program. Concrete sections were sized in <br />accordance with the ACI Building Code (318-63), using moments from <br />the computer output data. A minimum concrete thickness of 8" would <br />be observed. Hydraulic uplift was considered in the design of the <br />structures. Two configuration concepts were considered for <br />Consolidated Irrigation Ditch Intake Structure: <br /> <br />~ <br /> <br />1. A short conduit with flaring wingwalls. <br /> <br />2. A longer conduit with 900 wingwalls. <br /> <br />The second concept was selected because the greater conduit length <br />would lessen the chances of water piping beneath the structure. <br />Also, the 900 wingwalls would require less concrete than would the <br />flaring wingwalls of the first concept. A walkway would be furnished <br />to facilitate the operation of the water control gates at this <br />structure. The wingwalls of this structure would be designed for <br />moment due to horizontal loads using a hinged condition at the bottom <br />and a fixed condition at the conduit. Wingwall footings would be <br />unnecessary. The open trench method of installation would be used on <br />all the RCBC's. The downstream channel for a distance of 10 feet <br />below each RCBC would be protecced against hydraulic scour by the <br />placement of riprap. Concrete seep rings would be installed on all <br />RCBC's. Water control gates were selected from gate manufacturer's <br />specification catalogs. <br /> <br />{ <br />'- <br /> <br />32 <br />