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The proposed development will not increase the runoff rate or decrease the natural rate of <br />absorption of storm water. All developments shall be consistent with the City's Surface <br />Water Management Plan, other adopted policies, or engineering methods approved by the <br />City Engineer. <br /> <br />The development is consistent with the reasonable preservation of the views of the river <br />corridor from land and views of land from the river corridor. Negative impacts to views <br />of the river corridor or views from the river corridor to land shall be minimized. <br /> <br />Erosion protection measures shall make maximum use of natural in-place vegetation <br />rather than the placing of new vegetation on-site as erosion control facilities. The use of <br />natural erosion control devices shall be preferred to the maximum extent over the <br />construction facilities. Slopes which are susceptible to severe erosion shall be maintained <br />in a natural state in order to avoid damage from erosion, increased runoff and <br />sedimentation. <br /> <br />During site development planning, an emphasis shall be placed on minimizing the <br />amount of site disturbance by limiting the extent of site disturbance during and after <br />construction. The removal of vegetation and alteration of the natural topography shall be <br />limited to the area needed for project development. <br /> <br />The management and retention of trees and vegetation shall be considered during site <br />development. Methods to minimize the impact to existing vegetation shall be developed <br />prior to site work. The applicant shall demonstrate that there are no feasible or prudent <br />alternatives to cutting trees on the site; and if trees are cut, the density of trees shall be <br />restored to that which existed before development, but in no case shall the applicant be <br />required to raise the density above 10 trees per acre. The applicants shall demonstrate <br />that all grading which takes place will be conducted in a manner that preserves the root <br />zone aeration and stability of existing trees and provides an adequate watering area equal <br />to at least one-half of each tree's crown cover. <br /> <br />10. The grades of any streets shall not exceed 10 percent. <br /> <br />11. <br /> <br />The use of constructed drainage devices such as culverts, pipes, and holding ponds for <br />stormwater management shall be minimized to the degree possible. Natural green <br />infrastructure systems and other innovative methods for stormwater management are <br />preferred in site design and system or regional surface water approaches. <br /> <br />12. <br /> <br />The applicant shall demonstrate that the types and densities of land use proposed shall be <br />suited to the site and soil conditions and shall not present a threat to the maintenance of <br />the groundwater quality, a potential increase in maintenance cost of utilities, parking <br />areas or roads and shall not be subject to problems due to soil limitations, including but <br />not limited to, soil bearing strength, shrink/swell potential and excessive frost movement. <br /> <br />I3. <br /> <br />The quality of water runoff and water infiltrated to the water table or aquifer shall be <br />improved through the implementation of techniques described in this section and others <br />that may become available. <br /> <br />14. The proposed development, both vehicular and pedestrian, shall be adequate and <br /> consistent with local transportation and thoroughfare planning. <br /> <br />page 7 <br /> <br />Mississippi River Overlay District <br />Draft - Oct '05 <br /> 101 <br /> <br /> <br />