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roads, access and other uses, wi 11: <br />1. Be set back or screened as necessary to ensure <br />privacy to ad jvi ni ng properties, and <br />2. Avoid unnecessary disruption or removal of attrac- <br />ti ve natural features and vegetati an, and <br />3. Disperse motor traffic from planned unit <br />developments onto more than one public 1 ocal street when : ~ 1 } <br />the planned unit development exceeds 19 lots for units}; or <br />~2} the sum of proposed planned unit development lots for <br />units} and the ex~st~ng lets for units} utilizing a public <br />1 ocal street would exceed 19 lots for units } , and that publ i c <br />1 ocal street i s the s i ngl a means of ingress and egress; unless <br />a finding is made that it is not feasible due to physical <br />constra~ nts, such as topography, the previous 1 ayout of the <br />surrounding area, or similar constraints. <br />Section 3. Section 9.546 of the Eugene Code, 1971 is amended to provide: <br />9.546 Residential Net Densit . <br />~1} Net densities in residential areas are 1 invited as follows: <br />~ a} RA and R-1 districts . Except as provided for i n section <br />9.060, i n the RA and R-1 districts there shat l be a mi n i mum of 4, 500 <br />square feet of lot or development site area per dwelling unit. <br />fib} R-2 district. Between 10 and 24 units per acre. <br />~c} R-3 district. Between 15 and 40 units per acre. <br />~d} R-4 district. Between 20 and 110 units per acre. <br />~2} Buildings and uses conforming to the residential density <br />requirements in the R-2, R-3 and R-4 zoning districts on date of adoption} are <br />exempt from sections 9.612 to 9.620 pertaining to nonconforming uses. This <br />exemption is limited to development sites in the R-2, R-3, and R-4 zoning <br />districts on which residential buildings and uses existed, or in which a building <br />permit or 1 and use application i s pending, on date of adoption} . If such a <br />bu i 1 di ng which i s nonconforming for minimum density i s destroyed by fire or other <br />causes beyond, the control of the owner, the development site may be redeveloped <br />with the previous number of un~t~s} if completely rebuilt within five years. If <br />not completely rebuff 1 t within five years, the level apment site i s subject to the <br />dense ty standards of the s sects on. <br />~3} For purposes of this section, "net density" is the number of <br />dwelling units per. acre .of land i n actual residenti a1 use including areas <br />considered part of the residential use, such as common open space and other areas <br />which are for the exclusive use of the residents i n the development. For <br />purposes of calculating net density, the acreage of land considered part of the <br />residenti a1 use shall exclude dedicated reads, parks, and public foci l i ti es, The <br />acreage a1 so may exclude natural resource areas, at the discretion of the <br />developer. As used herei n, a natural resource area i s def i ned as the area wi thi n <br />the mapped boundaries of any 1 ocal l y inventoried wetland, pond, stream, channel , <br />river, lake or upland wi 1 d1 i fe habitat area. <br />Section 4. Section 9.620 of the Eugene Code, 1911, is amended by adding <br />a new Subparagraph ~d} thereto, to provide: <br />9.620 Exemptions . The following are exempt from these non-conformity <br />Ordinance • 2 <br />