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CHAPTER 2. DEVELOPMENT OF CAPACITY CHARGES
<br />Capacity Charge Unit Costs
<br />Capacity charge unit costs for each functional cost category shown in Table 2 -2 are developed
<br />using the asset values from Table 2 -1 for each category and dividing them by the capacity of the
<br />wastewater system for each category. The development of unit costs is shown schematically in
<br />Figure 1 -1. These unit costs may be used to calculate a capacity charge for any new connection.
<br />Table 2 -2. Capacity Charge Unit Costs
<br />Asset Class
<br />2008
<br />2009
<br />2010
<br />2011
<br />2012
<br />2013
<br />2014
<br />Asset Valuation
<br />Allocation $ (a)
<br />Flow
<br />$169,207,500
<br />$174,284,250
<br />$179,512,500
<br />$184,897,500
<br />$190,444,500
<br />$196,158,000
<br />$202,042,500
<br />BOD
<br />$27,073,200
<br />$27,885,480
<br />$28,722,000
<br />$29,583,600
<br />$30,471,120
<br />$31,385,280
<br />$32,326,800
<br />SS
<br />$29,329,300
<br />$30,209,270
<br />$31,115,500
<br />$32,048,900
<br />$33,010,380
<br />$34,000,720
<br />$35,020,700
<br />Design Capacity (b)
<br />Flow, gpd
<br />10,600,000
<br />10,600,000
<br />10,600,000
<br />10,600,000
<br />10,600,000
<br />10,600,000
<br />10,600,000
<br />BOD, Ibs /day
<br />41,471
<br />41,471
<br />41,471
<br />41,471
<br />41,471
<br />41,471
<br />41,471
<br />SS, Ibs /day
<br />39,186
<br />39,186
<br />39,186
<br />39,186
<br />39,186
<br />39,186
<br />39,186
<br />Unit Costs
<br />Flow, $ /gpd
<br />$15.96
<br />$16.44
<br />$16.94
<br />$17.44
<br />$17.97
<br />$18.51
<br />$19.06
<br />BOD, $ /Ibs /day
<br />$652.82
<br />$672.41
<br />$692.58
<br />$713.36
<br />$734.76
<br />$756.80
<br />$779.50
<br />SS, $ /Ibs /day
<br />$748.46
<br />$770.92
<br />$794.05
<br />$817.87
<br />$842.40
<br />$867.68
<br />$893.70
<br />Notes:
<br />a. Asset allocation values are from Table 2 -1.
<br />b. The design capacities for
<br />flow, BOD and SS
<br />were obtained
<br />from
<br />Technical Memorandum
<br />No. 1 Flow and Loading Evalution
<br />dated February
<br />2009.
<br />Values are Average Day
<br />Maximum Month (ADMM) from Table 1. 12, Influent Flow and Loading Projections WPCP Rehabilitation Project.
<br />Current, Allowable and Recommended Capacity Charge Unit Costs
<br />The capacity charge unit costs shown in Table 2 -2 are those that are allowable based on the
<br />selected development methodology. Recommended unit costs are equal to the allowable unit costs
<br />in all years.
<br />Current and recommended capacity charge unit costs are shown in Table 2 -3.
<br />Table 2 -3. Current and Recommended Capacity Charge Unit Costs
<br />Actual Recommended
<br />Asset Class 2008 2009 2010 2011 2012 2013 2014
<br />Unit Costs (a)
<br />Flow, $ /gpd $5.70 $5.87 $16.94 $17.44 $17.97 $18.51 $19.06
<br />BOD, $ /Ibs /day $344.10 $354.80 $692.58 $713.36 $734.76 $756.80 $779.50
<br />SS, $ /Ibs /day $362.67 $373.94 $794.05 $617.87 $842.40 $867.68 $893.70
<br />Notes:
<br />a. Capacity charge unit costs are from Table 2 -2.
<br />2 -3
<br />
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