OAKLEZGH <br />im ~t u 0 W <br />u9 oae~,ii <br />a .bssan a~iu.80 iY0°::N. C D H O U J I N G <br />!r Findings: The proposed development provides rain gardens, pervious <br />hardscapes, and vegetated bio-swales compliant with EC 9.6790 through 9.6796 <br />Stormwater Management Standards and the 2008 Eugene Stormwater Manual <br />as evidenced by the following: <br />EC9.6791 -StormwaterDestination. <br />(1) Purpose. The purpose of EC 9.6791 is to protect life and property <br />from flood and drainage hazards by maintaining the capacity of <br />the city's stormwater conveyance system through the <br />establishment of destination regulations for storm water runoff <br />from the development. <br />(2) Applicability. Destination standards apply to all development. <br />(3) Standards. Stormwater drainage facilities shall be designed and <br />constructed according to adopted plans and policies, and in <br />accordance with standards in EC Chapters 6 and 7, and the <br />storm water destination provisions and the facility design <br />requirements set forth in the Stormwater Management Manual. <br />On-site infiltration is the preferred storm water destination for <br />development in the River Road - Santa Clara Basin. An application <br />proposing a new development must submit documentation to the <br />city showing the stormwater destination into which the proposed <br />development will be disposed. The documentation must establish <br />that the new development will be disposed of into existing <br />storm water drainage facilities that, considering all developments <br />that have received tentative or final plan approval as of the date <br />the developer submits a complete application, have the capacity <br />to handle the stormwater runoff that will be generated by the <br />proposed new development for the flood control design storm, or,. <br />if the applicant cannot establish that existing storm water <br />drainage facilities have such capacity, the applicant must <br />construct storm drainage facilities to accommodate the <br />stormwater draining from the proposed development. <br />Findings: The proposed stormwater management system has been designed <br />to protect life and property from potential flooding and will be constructed <br />according to all adopted plans and polices pursuant to EC Chapters 6 and 7 <br />and also City of Eugene's Stormwater Management Manual. Since there is <br />no existing stormwater system available and due to the existing conditions of <br />the development site,.infiltration is unadvisable. Destination of the <br />stormwater from the development site, after treatment, will be along the <br />east side of the property and will slowly sheet drain on to the adjacent city <br />property. Flow from the site is reduced to pre-development flow and is <br />dispersed using rip rap; no increase is proposed. This destination was agreed <br />PUD Tentative - June 14, 2013 Page 34 of 46 Oakleigh Cohousing PDT 13-0001 1393 <br />