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i <br /> 2' MINIMUM <br /> 6' MINIMUM <br /> i <br /> CONCRETE <br /> HEADWALL <br /> j 12' MINIMUM <br /> I---- 50' MAXIUMUM W/❑ DI ---I <br /> NOTES <br /> 1, Flowline of pipe shall be <br /> a minimum of 3' below ditch <br /> flowline and a maximum of <br /> 1/3 diameter of pipe below <br /> ditch flowline, <br /> 2. Pipes shall be <br /> FLOW reinforced concrete, or <br /> j LINE 0,079' galvanized <br /> ! corrugated steel pipe, the <br /> size varies according to <br /> to the hydraulic <br /> requirement. <br /> 3, MInumum culvert <br /> FLOW 3' MINIMUM diameter 12', <br /> LINE 4. 6' minimum cover, <br /> 5. IS' drain Inlet on pipes <br /> up to 24', 24' drain Inlet <br /> on pipe larger than 24'. <br /> 6. Drain Inlet placed <br /> mlmimum every 50' of pipe, <br /> 7. See SJC Improvement ! <br /> Standards CW-D14 and <br /> FLOW CW-M7, concerning 'Inlet <br /> 1/3 DIAMETER and Catch Basin' and <br /> LINE MAXIMUM 'Frame and Grate', ! <br /> respectively. <br />