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June 16, 2022 <br />90 <br /> <br />(c) If stormwater management information provided in accordance with Section 6.06 (b) of <br />this Ordinance indicates that the existing stormwater management system on the subject <br />tract does not meet the requirements of this Section, then stormwater management <br />facilities must be designed and proposed to meet the requirements of this Ordinance. <br />(d) When the proposed stormwater management system will utilize or be integrated into an <br />existing stormwater collection or conveyance system, the existing facilities within the <br />proposed subdivision shall be improved to the standards of this Ordinance. The applicant <br />shall determine the impacts of any proposed improvements of the existing system to <br />downstream properties. If, in the opinion of the Planning Commission, the improvements <br />will cause adverse impacts on downstream properties, the applicant shall mitigate such <br />impacts. <br />(e) Stormwater Management. All major subdivision applications shall include stormwater <br />management data in a form acceptable to the Planning Commission. The stormwater <br />management data shall identify all proposed stormwater management facilities and <br />supportive information as required by this Ordinance. Stormwater management data <br />shall be prepared by individuals registered in the North Dakota to perform such duties <br />and include the certification illustrated in Figure 16 below. <br /> Figure 16. <br /> Storm Drainage Plan Certification <br />I hereby certify that, to the best of my knowledge, the storm drainage facilities shown and described <br />hereon are designed in conformance with the Cass County Subdivision Ordinance. <br />___________________, 20___ *________________________________________________ <br /> <br /> <br />** <br /> <br />__________________________________________________________________________________ <br />*Signature of the registered engineer or registered surveyor responsible for the preparation of the plan <br />**Seal of the engineer or surveyor <br />Developers and consultants are urged, but not required to discuss stormwater <br />management design approaches for specific projects with the Planning Commission staff <br />prior to the submission of the Preliminary or Final Plat. <br />(f) General Design Data. <br />1. Location of Easements. To the fullest extent possible, easements shall be adjacent to <br />property lines. <br />2. In the interest of reducing the total area of impervious surface, preserving existing features <br />which are critical to stormwater management and reducing the concentration of