Item 9: Ordinance Concerning Stormwater Development Standards

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9.6791 Stormwater Destination. (1) Purpose. The purpose of EC 9.6791 is to protect life and property from flood and drainage hazards by maintaining the capacity of the city’s stormwater conveyance system through the establishment of destination regulations for stormwater runoff from development. (2) Applicability. Destination standards apply to all development. (3)Standards. Stormwater drainage facilities shall be designed and constructed according to adopted plans and policies, and in accordance with standards in EC Chapters 6 and 7, and the stormwater destination provisions and the facility design requirements set forth in the Stormwater Management Manual. An applicant proposing a new development must submit documentation to the city showing the stormwater destination into which the proposed development will be disposed. The documentation must establish that the new development will be disposed of into existing stormwater drainage facilities that, considering all developments that have received tentative or final plan approval as of the date the developer submits a complete application, have the capacity to handle the stormwater runoff that will be generated by the proposed new development for the flood control design storm, or, if the applicant cannot establish that existing stormwater drainage facilities have such capacity, the applicant must construct storm drainage facilities to accommodate the stormwater draining from the proposed development. (4)Underground Injecton Control Systems. iStormwater runoff disposed of in underground systems is also regulated through the federal Underground Injection Control (UIC) program under Part C of the Safe Drinking Water Act (42 U.S.C. § 300, Chapter 6A, Subchapter XII) and Oregon Administrative Rule Chapter 340, Section 044. 9.6792 Stormwater Pollution Reduction. (1)Purpose. The purpose of EC 9.6792 is to reduce the impacts that urbanization is having on the city’s water quality by providing standards for the capture and treatment of stormwater runoff from development. (2)Applicability and Exemptions. (a) Except as exempt under EC 9.6792(2)(c), the standards in EC 9.6792(3) apply to all land use applications submitted after [effective date of this ordinance] requesting approval of one or more of the following: 1. A cluster subdivision - tentative plan (EC 9.8055); 2. A conditional use (EC 9.8090 or 9.8100); 3. A partition - tentative plan that includes the creation or construction of a street (EC 9.8215 or 9.8220); 4. A planned unit development - tentative plan (EC 9.8320 or 9.8325); Ordinance - 5 4/3/06 - Ordinance includes changes made pursuant to the 1/9/06, 1/10/06 and 2/13/06 PC meetings and the 3/13/06 City Council Work Session. L:\CMO\2006 Council Agendas\M060612\S0606129-attA.doc