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Wastewater Capacity Charges Study
<br />Section 2
<br />The value of the wastewater system is allocated among flow, BOD and SS constituents to facilitate the
<br />development of capacity charge unit costs. The unit costs can be used to develop capacity charges for
<br />any new connection. The cost to construct the wastewater collection components of the wastewater
<br />system are proportionate to flow. The cost to construct the wastewater treatment components of the
<br />wastewater system are proportionate to flow, BOD and TSS. The allocation of the wastewater system
<br />valuation is shown in Table 2-2.
<br />Item
<br />2018
<br />2019
<br />2020
<br />Projected
<br />2021
<br />2022
<br />2023
<br />Net Valuation
<br />$296,029,000
<br />$311,264,000
<br />$327,082,000
<br />$343,505,000
<br />$360,555,000
<br />$378,255,000
<br />Asset Allocation
<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 />Allocation Percent
<br />41,471
<br />41,471
<br />41,471
<br />41,471
<br />41,471
<br />41,471
<br />Flow
<br />75.0%
<br />75.0%
<br />75.0%
<br />75.0%
<br />75.0%
<br />75.0%
<br />BOD
<br />12.5%
<br />12.5%
<br />12.5%
<br />12.5%
<br />12.5%
<br />12.5%
<br />SS
<br />12.5%
<br />12.5%
<br />12.5%
<br />12.5%
<br />12.5%
<br />12.5%
<br />Allocation $
<br />Flow
<br />$222,021,750
<br />$233,448,000
<br />$245,311,500
<br />$257,628,750
<br />$270,416,250
<br />$283,691,250
<br />BOD
<br />$37,003,625
<br />$38,908,000
<br />$40,885,250
<br />$42,938,125
<br />$45,069,375
<br />$47,281,875
<br />SS
<br />$37,003,625
<br />$38,908,000
<br />$40,885,250
<br />$42,938,125
<br />$45,069,375
<br />$47,281,875
<br />2.2 System Capacity
<br />Values for the capacity of the wastewater system are based on design flow and loadings associated with
<br />the average day maximum month. Values for flow, BOD and SS are shown below in Table 3-1.
<br />Item
<br />2018
<br />2019
<br />2020
<br />2021
<br />2022
<br />2023
<br />Design Capacity [11
<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 />BOD, lbs/day
<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 />Notes:
<br />1. The design capacities forflow, BOD and SS were obtained from
<br />Technical Memorandum No. 1 Flow and Loading Evalution dated February 2009.
<br />Values are Average Day Maximum Month (ADMM) from Table 1.12,
<br />Influent Flow and Loading Projections WPCP Rehabilitation Project.
<br />2-3
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