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34 <br /> <br />2) Existing section line ditches within the proposed subdivision shall have a minimum ditch <br />grade of not less one tenth of one percent (0.1%) with inslope no steeper than five (5) <br />horizontal to one (1) vertical (5:1) and backslope side slopes no steeper than four (4) <br />horizontal to one (1) vertical (4:1) and a minimum ditch bottom of five (5) feet. This standard <br />may extend to the section lines ditches outside of the proposed subdivision at the discretion <br />of the County Engineer. <br />3) Lot grading plans that meet the requirements of the County Engineer shall be submitted <br />(examples will be inserted here). <br />4) All necessary drainage easements shall be provided on the plat. <br />5) Proposed drainage shall demonstrate no adverse impact on surrounding land and drainage <br />systems. <br />6) All proposed developments, except those in townships with adopted flood plain management <br />regulations, shall be built pursuant to the Cass County Flood Damage Ordinance #1998-2, as <br />it presently exists or may hereafter be amended. <br />(d) Lot Density Restrictions. For the purpose of encouraging orderly and economically- <br />feasible growth, preventing new developments from creating economic strains on county <br />residents, protecting the county's valuable farmland and agricultural traditions, <br />promoting development that will more easily convert to an urban environment and <br />implementing the goals and objectives established by the Cass County Comprehensive <br />Plan (2005) the following lot density restriction is established. This density restriction will <br />promote small, truly rural developments that will mesh more easily with existing <br />agricultural land and activities and will encourage larger urban style subdivisions to <br />develop in the urban fringe and other areas with supportive infrastructure. <br />Developments built beyond the density restriction will be constructed with full <br />supportive urban infrastructure, ensuring developments that will more easily transition <br />into an urban development upon annexation without extensive and costly infrastructure <br />upgrades. Except as noted in the exemptions below, no subdivision of land shall exceed <br />one (1) buildable lot per quarter-quarter section (40 acres). <br />1) If the development has followed the transfer of development rights pursuant to this <br />Ordinance and in accordance with all other required provisions of this Ordinance; or <br />2) If the subdivision will be built to full urban design standards and the strictest requirements <br />outlined within Article VII of this Ordinance; including but not limited to paved roads with curb <br />and gutter, a paved access road, municipal sewer system, public water supply system with <br />functioning fire hydrants, storm water facilities, street lights, street trees, street signs, <br />sidewalks, bike paths and park dedications. <br />(e) Watercourse Setback Requirements. <br />1) Purpose. In order to minimize the potential for slumping, bank failures, landslides, other <br />environmental impacts, and the associated damage to structures and property certain <br />requirements are established by this ordinance for all proposed subdivisions adjacent to blue <br />line perennial watercourses, as identified on the most recent version of a 1:100,000 or <br />1:24,000 USGS quadrangle.