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drainage courses either on -site or downstream, including, but not limited to, <br />erosion, scouring, turbidity, or transport of sediment due to increased peak flows <br />or velocity. <br />(11) Lots proposed for development with one - family detached dwellings shall <br />comply with EC 9.2790 Solar Lot Standards (these standards may be modified <br />as set forth in subsection (12) below). <br />(12) The PUD complies with all applicable development standards explicitly <br />addressed in the application except where the applicant has shown that a <br />modification is consistent with the purposes as set out in EC 9.8300 Purpose of <br />Planned Unit Development <br />(13) For any PUD located within or partially within the boundaries of the South Hills <br />Study, the following additional approval criteria apply: <br />(a) No development shall occur on land above an elevation of 900 feet except <br />that one dwelling may be built on any lot in existence as of [effective date <br />of this ordinance to he inserted later]. <br />(b) Development shall be setback at least 300 feet from the ridgeline unless <br />there is a determination by the city manager that the area is not needed as a <br />connection to the city's ridgeline trail system. For purposes of this <br />section, the ridgeline trail shall be considered as the line indicated as being <br />the urban growth boundary within the South Hills Study plan area. <br />(c) Development shall cluster buildings in an arrangement that results in at <br />least 40% of the development site being retained in 3 or fewer contiguous <br />common open space areas. For purposes of this section, the term <br />contiguous open space means open space that is uninterrupted by <br />buildings, structures streets, or other improvements. <br />(d) Residential density is limited as follows: <br />1. In the area west of Friendly Street, the maximum level of new <br />development per gross acre shall be 8 units per acre. <br />2. In the area east of Friendly Street, the maximum level of new <br />development per gross acre shall be limited to 5 units per acre. <br />3. Housing developed as Controlled Income and Rent Housing shall be <br />exempt from the density limitations in subsections 1 and 2 above, but <br />are subject to the other applicable development standards and review <br />procedures. <br />9.5330 <br />Site Alteration Unless specifically permitted by the hearings official, vegetation, <br />topography, and other natural features of areas proposed for a PUD shall not be <br />substantially altered until final PLTD approval, and then only as authorized by the final <br />PUD approval. "Substantially altered" includes, but is not limited to, site grading and <br />removal of trees or other vegetation. If a subdivision is required, site alteration shall <br />not be permitted until after tentative subdivision approval is granted. <br />Ordinance - 360 <br />