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1.80- <br />1.60 <br />1.40 - <br />1.20 <br />1.00 <br />0.80- <br />0.60 - <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />Runoff <br />(Inches) <br />Land Use Categories <br />Existing land use was used to determine each property's contribution to the <br />utility. Table 4 illustrates typical runoff curve numbers. <br />Using these criteria, land use categories and the respective curve numbers for <br />use in the runoff equation are illustrated below. For the respective land uses, <br />the curve numbers (CNs) are applied to determine the amount of runoff for <br />an area resulting from a specified amount of rainfall as illustrated in Figure 1. <br />The contribution towards the storm water utility is equated to the percentage <br />of the total runoff for each property type. <br />Figure 1 — NRCS /SCS Runoff Model Runoff Example <br />NRCS /SCS Runoff Model <br />0.40 - <br />0.20 <br />0.00 <br />a <br />cr <br />cr <br />a,� oc o� o �� 3� �� �� o �a �m o CO <br />f o o '9 ■ i v <br />Goc Goc mo ��, ,o, moo, o m° Ica e ti <br />ctr <br />Q C <br />co o'9 <br />o <br />G y J •m <br />y o-\ <br />Qm m � <br />Feasibility Study <br />City of Lino Lakes, Minnesota Page 17 <br />A -LI NOL0602.00 <br />