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Wastewater Capacity Charges Study Section 2
<br />
<br /> 2-3
<br />DRAFT Use of contents on this sheet is subject to the limitations specified at the end of this document.
<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 />
<br />Table 2-2. Allocation of Wastewater System Valuation
<br />
<br />
<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 />
<br />Table 2-3. Wastewater System Capacity
<br />
<br />
<br />
<br />Projected
<br />Item 2018 2019 2020 2021 2022 2023
<br />Net Valuation $296,029,000 $311,264,000 $327,082,000 $343,505,000 $360,555,000 $378,255,000
<br />Asset Allocation
<br />Allocation Percent
<br />Flow 75.0% 75.0% 75.0% 75.0% 75.0% 75.0%
<br />BOD 12.5% 12.5% 12.5% 12.5% 12.5% 12.5%
<br />SS 12.5% 12.5% 12.5% 12.5% 12.5% 12.5%
<br />Allocation $
<br />Flow $222,021,750 $233,448,000 $245,311,500 $257,628,750 $270,416,250 $283,691,250
<br />BOD $37,003,625 $38,908,000 $40,885,250 $42,938,125 $45,069,375 $47,281,875
<br />SS $37,003,625 $38,908,000 $40,885,250 $42,938,125 $45,069,375 $47,281,875
<br />Item 2018 2019 2020 2021 2022 2023
<br />Design Capacity [1]
<br />Flow, gpd 10,600,000 10,600,000 10,600,000 10,600,000 10,600,000 10,600,000
<br />BOD, lbs/day 41,471 41,471 41,471 41,471 41,471 41,471
<br />SS, lbs/day 39,186 39,186 39,186 39,186 39,186 39,186
<br />Notes:
<br />1. The design capacities for flow, BOD and SS were obtained from
<br />Technical Memorandum No. 1 Flow and Loading Evaluti on dated February 2009.
<br />Values are Average Day Maximum Month (ADMM) from Table 1.12,
<br />Influent Flow and Loading Projections WPCP Rehabili tation Project.
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