Flow Projections. Wastewater flows were not updated in the 2022 Water Demand Forecasting Summary, so information from the Strategic Plan was utilized with the same methodology as those projections. Assumptions from the Strategic Plan were utilized as the basis and were updated as necessary (see Table 8 below). Since the ▇▇▇▇▇▇▇ Springs area is separated from the rest of the NCWSA system, is relatively new, and is limited to eastern Newton County, different assumptions were used for this portion of their system. Residential Per Capita Flow (gpd) 60 60 60 60 60 60 60 Inflow / Infiltration 30% 28% 25% 20% 20% 20% 20% ▇▇▇▇▇▇▇ Springs I/I 12% 15% 17% 19% 20% 20% 20% Uncertainty Factor 2% 5% 8% 12% 15% 18% 20% CII Reserve1 2% 5% 8% 11% 13% 15% 15% MMADF/AADF Ratio 1.4 1.4 1.4 1.4 1.4 1.4 1.4 Covington 90% 100% 100% 100% 100% 100% 100% NCWSA 30% 30% 30% 30% 30% 30% 30% Oxford 20% 20% 20% 20% 20% 20% 20% Porterdale 50% 50% 50% 50% 50% 50% 50% 1CII Reserve is a safety factor used to account for unplanned Commercial, Industrial, and Institutional land use In 2015, approximately 11.2% of the total county population was served by ▇▇▇▇▇▇▇▇▇ sewer, whereas approximately 16% was served by NCWSA. The percentage of the population served by sewer is anticipated to grow, but at this point the total population with on-site (septic) treatment is anticipated to grow at a much slower rate and would most likely occur in the more remote areas of the County. Populations estimated to be served by Covington or NCWSA sewer are detailed in Table 9. Total sewer flow projections are summarized in Table 10 below. 2020 112,843 12% 13,541 16% 18,055 3% 2,821 1% 1,354 2025 122,924 13% 15,980 17% 20,897 2% 2,857 1% 1,500 2030 134,468 14% 18,826 18% 24,204 2% 2,931 1% 1,667 2035 146,708 15% 22,006 19% 27,875 2% 3,008 1% 1,834 2045 169,245 17% 28,772 21% 35,541 2% 3,097 1% 2,149 2055 186,808 19% 35,494 23% 42,966 2% 3,101 1% 2,410 2065 205,115 21% 43,074 25% 51,279 2% 3,097 1% 2,687 2075 228,828 23% 52,631 27% 61,784 1% 3,135 1% 3,043 ▇▇▇▇▇▇▇▇▇ 2.5 3.4 3.2 4.5 3.9 5.4 5.2 7.2 6.6 9.3 8.4 11.8 10.5 14.6 NCWSA West 2.0 2.8 2.5 3.4 2.9 4.1 4.8 6.7 6.0 8.4 7.5 10.5 9.2 12.9 NCWSA East Discharge to sanitary 0.5 0.7 2.6 3.6 3.5 5.0 3.8 5.4 4.3 6.0 4.5 6.3 4.6 6.4 NCWSA East Discharge to IWRF 0.9 1.2 1.1 1.6 2.3 3.3 2.3 3.3 2.3 3.3 2.3 3.3 2.3 3.3 Oxford 0.3 0.5 0.4 0.5 0.4 0.6 0.4 0.6 0.4 0.6 0.5 0.6 0.5 0.7 Porterdale 0.1 0.2 0.2 0.2 0.2 0.3 0.2 0.3 0.3 0.4 0.3 0.4 0.4 0.5 ▇▇▇▇▇▇▇▇▇ WRF1 2.5 3.6 3.3 4.6 3.9 5.5 5.2 7.3 6.7 9.4 8.5 11.9 10.6 14.8 Yellow River WPCP1,2 2.5 3.4 2.9 4.1 3.4 4.8 5.3 7.5 6.6 9.3 8.2 11.4 9.9 13.9 A ▇▇▇▇▇ ▇▇▇▇▇▇ WRF 0.5 0.7 2.6 3.6 3.5 5.0 3.8 5.4 4.3 6.0 4.5 6.3 4.6 6.4 1Includes flow from Oxford 2Includes flow from Porterdale 3Based on latest industry projections in ▇▇▇▇▇▇▇ Springs
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