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,! <br /> <br />-2]- <br /> <br /> trunk * >:; then, estimate of laterals = >: - ester, ate of trun~t. Ti~e <br /> <br /> averaging over 40%, as a result of its growth management system. . <br /> <br /> Estimate of Cost Savings <br /> <br /> Estimates of co~ts per mile of pipe (by trunk, by lateral) by <br /> service ~'ere calculated using actual bids f°r j°bs in Br°°klyn Park in <br /> 1967 and 1972. Th~ mi]es of pipe added (by truck, by laleral) by <br /> eeL-vice were then calculated fo~ each of two'oariods' 19o7 1972, 1972 <br /> <br /> conservative method of=calculating cost savings. Cost per mile of <br /> pipe increased from 25% to 103%, depending on the service, between <br /> ~967 and 1972 Therefore, applying the cost estimate fr~m the first <br /> <br /> year of the period to the total miles of pipe added over the 4-5 year <br /> period tends to underestimat~t_h ua costs for p~ dded during <br /> the periocL_~l~_--$-ati-sp~ays the ~esulta.9 -------_ _.._~..~ <br />I ~The tabldshows a {airly sizeable cost saving per ~e~iod p~ <br /> service. Assuming the cost savings were equa~in each year acrossJ <br /> 10 <br /> for tru2ik]d2n]nlai[~]~jn~d]e~%f~nterest rate,-- the total sevinr the three se~-~ices between 19~ <br /> and 1976 i~ 1976 d°llars might Be very c°nservatively e~at <br /> <br /> DISCUSS ION-~----- ' <br /> For the three public services most central to the Brooklyn Park <br /> "Growth Management System -- sanitary sewer, water and storm sewer <br /> <br /> <br />