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CLEAR & OBJECTIVE HOUSING: APPROVAL C RITERIA UPDATE <br /> <br /> <br />November 13, 2018 DRAFT Preferred Concepts Report: Significant Issues Page 26 of 59 <br /> <br />COS -03 (20 P ERCENT S LOPE G RADING PROHIBITION) <br />Description : The clear and objective track for planned unit development and subdivision approval includes a <br />requirement that prohibits grading on slopes that meet or exceed 20 percent. This may not be the most <br />effective and efficient way to address potential impacts to steep slopes. It may have the effect of precluding <br />development under the clear and objective track for sites with significant slopes, particularly for properties <br />subject to the South Hills Study, or sites with unusual configurations where a portion of the site over 20 percent <br />slope prevents the development potential of the remainder under the clear and objective track. There is no <br />maximum slope where grading is prohibited under the discretionary track, and slope impacts are reviewed <br />through a geological report. State standards presume that up to 25 percent slopes are developable for purposes <br />of calculating buildable lands for development (OAR 660-008-0005(5)), and Eugene’s Buildable Lands Inventory <br />(BLI) classifies lands up to 30 percent slopes as potentially developable. <br />Applies To : Planned Unit Development, Subdivision <br />Existing Code Section(s): EC 9.8325(5), EC 9.8520(5) <br />Existing Code Language : (Planned Unit Development only provided below) <br />9.8325(5) There shall be no proposed grading on portions of the development site that meet or exceed 20% <br />slope. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Recommendation : Eliminate the existing criterion and rely on the geotechnical requirements. Ensure that <br />revisions to the geotechnical requirements proposed under COS-13 (Geotechnical Requirement) address <br />A. No Change – – + o o –– <br />B. Increase percentage limit to 25% or 30%––+o o –o <br />C. Retain 20% grading prohibition, but exempt <br />certain grading activities. Codify how slope is <br />measured (e.g., using 2’ contours over a minimum <br />run of 10) <br />––+oo –– <br />D. Eliminate 20% grading prohibition and rely on <br />geotechnical review requirements that ensure <br />development will not impact geological stability, <br />or that any impacts will be mitigated <br />++++o ++ <br />E. Replace with new requirement to address soil <br />erosion and slope failure+oo+o o – <br />+ promotes o neutral – inhibits <br />Possible Concepts <br />January 23, 2019, Work Session – Item 1