Laserfiche WebLink
COMPREHENSIVE SEWER PLAN <br />Sanitary Sewer Design Criteria <br />September 15, 2020 <br />Curves used to describe this ratio, called the Peak Flow Factor (PFF), indicate a decreasing ratio of peak <br />flow to average flow with increasing average flow. <br />The PFF values applied in this study are shown in Figure 3-1 as a curve and in tabular form. These <br />values are generally conservative and widely used throughout the state for municipal planning. They <br />include a standard allowance for 1/1, which is typical of new sanitary sewer construction as well as <br />properly operating existing sewers. The design flows for each sewer subdistrict are presented in <br />Appendix C. <br />Figure 3-1 - Peak Flow Factors <br />PEAS FLOW FACTORS <br />PEAR FLOW <br />AVERAGE DAILY <br />FACTOR <br />FLOW LIMITS (MCD) <br />4.0 <br />0.00 - 0.11 <br />3.9 <br />0.12 - 0.18 <br />3.8 <br />0.19 - 0.23 <br />3.7 <br />0.24 - 0.29 <br />3.6 <br />0.30 - 0.39 <br />3.5 <br />❑.40 - 0.49 <br />3.4 <br />a.50 - 0.64 <br />3.3 <br />❑.65 - 0.79 <br />3.2 <br />0.80 - 0.99 <br />3.1 <br />1.00 - 1.19 <br />3.0 <br />1.2❑ - 1.49 <br />2.9 <br />1.50 - 1 .89 <br />2.8 <br />1.90 - 2.29 <br />2.7 <br />2.30 - 2.89 <br />2.6 <br />2.90 - 3.49 <br />2.5 <br />3.50 - 4.19 <br />2.4 <br />4.20 - 5.09 <br />2.3 <br />5.10 - 6.39 <br />2.2 <br />6.40 - 7.99 <br />2.1 <br />9.00 - 10.39 <br />2.0 <br />10.40 - 13.49 <br />1.9 <br />1a50 - 17.99 <br />1.8 <br />18.00 - 29.99 <br />1.7 <br />OVER 30.00 <br />4.0 3.5 3.0 2.5 2.0 <br />PEAK FLOW FACTOR <br />is <br />16 <br />14 <br />4 <br />2 <br />0 <br />1.5 <br />0 <br />B <br />v:\1938\active\193804167\reports\2018 csp\submitted to city 9-8-2020\moundsviewcsp_formcesreview-09152020_updateddraft.docx <br />3.6 <br />