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(4) In imposing charges, it is necessary to establish a methodology that undertakes to make <br />them just and equitable. Taking into account the status of completion of the system, past <br />methods of recovering system costs, the topography of the city and other relevant factors, it <br />is determined that it would be just and equitable to assign responsibility for some or all of the <br />future costs of operating, maintaining and improving the system on the basis of the acreage <br />of land to be developed er- Fedeveleped. <br />(5) Assigning costs and making charges based upon expected typical stormwater runoff <br />cannot be done with mathematical precision but can only be accomplished within reasonable <br />and practical limits. The provisions of this subdivision undertake to establish a reasonable <br />and practicable methodology for making such charges. <br />(Ord. No. 214 2nd series, § 1(2), 12-10-2001) <br />Sec. 14-283. Rates and charges <br />(a) Establishing. The stormwater trunk fee charges, for various land uses, shall be included <br />in the city fee schedule and shall be changed as necessary by resolution of the council. <br />(b) Determination. The city has developed a surface water management plan that includes <br />design criteria for stormwater systems and preliminary design information for a <br />comprehensive stormwater system in the city. In general, stormwater trunk fees are <br />calculated by dividing the total cost of system construction, by the number of developable <br />acres the system will serve. The appropriate base trunk fee per acre, to be used on a citywide <br />basis, shall be determined as necessary using this methodology. <br />(c) Acreage equivalency factors. Recognizing that different types of land use generate <br />different amounts of stormwater runoff, an equivalency factor multiplier is assigned to each <br />land use type. The two -acre residential lot is considered as the standard in the city, because a <br />large percentage of the land in the city is zoned for two -acre single-family residential land <br />use. The two -acre single-family residential lot will be assigned an equivalency factor of 1.0. <br />The table below lists the equivalency factors for different land uses. These equivalency <br />factors will be applied to the base trunk fee per acre. <br />TABLE INSET: <br />Land Use <br />Equivalency Factor <br />Single -Family Residential 5 -Acre Zone (0 (2) <br />0.8 <br />Single -Family Residential 2 -Acre Zone (3) <br />1.0 <br />Single -Family Residential 1 -Acre Zone <br />1.3 <br />Single -Family Residential 112 -Acre Zone <br />1.5 <br />Multifamily Residential 4 Units/Acre or Less <br />1.8 <br />Multifamily Residential Greater than 4 Units/Acre <br />2.1 <br />Commercial or Industrial <br />2.4 <br />qi­ <br />NMI -104' <br />Page 2 of 6 <br />