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consult'rig eng'neers d'vers'f'ed ' <br /> p.o. box j. osseo, minnesota 55369 Ln (612) 425-2181 <br /> <br />civil <br />municipal <br />planning <br />environmental <br />land surveying <br />geotechnics <br /> <br />Honorable Mayor and City Council <br />City of Ramsey <br />May 30, 1978 <br />Page 2 <br /> <br />one percent. <br /> <br />The capacity allocation now proposed to be provided in the CAB facility will <br />acconmodate saturated development of the urban planning area at normal urban <br />densities and for saturated develotx~_nt of the transitional area at an average <br />density of six persons per gross acre,iWith minimal excess capacity that oould <br />be used by the rural area. <br /> <br />The basis for evaluation of the CAB design capacity allocation has been an assumed <br />annual average sewage contribution of 7'0 gallons per capita as opposed to the 100 <br />gallons per capita assumed in the Ramsey Comprehensive Sewer Plan. <br /> <br />The 100 gallon per day assumption has .been reconmendedby the Mi~nesota Pollution <br />Control Agency for use in designing entirely new sanitary sewer systems with no <br />previous records of flow. Flows measured~throughoutthemetropolitanarea since <br />that report was prepared have shown values near 70 gallons per capita to reflect <br />the actual current contribution. : <br /> <br />In sunmary, the system capacity alternatives are: <br /> <br />Alternate Total PE* <br /> <br />Ave. Annual Flow <br /> <br />9 PE/Acre @ 100 GCD <br />(Plan I Ramsey CSP 1974) <br /> <br />148,195 14.82 MGD <br /> <br />6 PE/Acre @ 100 GCD <br />(Plan II Ramsey CSP 1974) <br /> <br />123,775 12.38 MGD <br /> <br />CAB CapacityAllocation <br />Saturated Development, Urban <br />Planning Area, 6 PE/Acre <br />Transition Area @ 70 GCD <br /> <br />112,429 7.87 MGD <br /> <br />* PE = Population Equivalent <br /> <br />keith caswell jr. u :darrell schneider uJ richard sha <br /> <br /> <br />