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rssume <br /> c assessment <br /> -:EE <br /> retention pond volume costs$0.03/gallon <br /> l; hauiin to Stockton wastewater treatment plant costs$0.051gallon <br /> :ase 1 <br /> Annualized 10%interest over 10 ears} <br /> Capital cost _ $153,351 $24,996 <br /> Annual haul and disposal cost $35,865 $35,865 <br /> Total annual cost $60,862 <br /> Case 11 <br /> Capital cost _ $107,133 $17,463 <br /> Annual haul and disposal east $17,776 $17,776 <br /> Total annual cost $35,239 <br /> Case 111 <br /> Capital cos# $61,716 $10,060 <br /> Annual haul and disposal c:ost $152,726 $152,726 <br /> Y Total annual cost $162,786 <br /> Estimate maximum ditch section for runoff <br /> Use rational formula Q--CIA <br /> Assume C= 1 <br /> jAssume t€me of concentration= 10 minutes <br /> 0.25 inches 1.5 inches per hour <br /> a= 16.615 acres assuming site is drained b two ditches <br /> 1-- 25 cfs <br /> Assume ditch slope= 0.0001 fvft <br /> Limit maximum velocity to 2 ft/sec Estimated u ing Manning equation 1.4 ftfsec <br /> Cross-sectional area= 12.9 ft2 <br /> Maximum ditch cross-section 3 ft dee 2:1 sideslo s;12 ft wide <br /> Elevation fall over 2,400 feet 0.24 feet <br /> PN:dtria-.XWATERBALXLS Page 5 of 5 Panted:81311 3:46 PM <br />