Chapter 12.16 STORM WATER MANAGEMENT


Section 12.16.030 Applicability.

This chapter shall be applicable to all subdivision or site plan applications, unless eligible for an exemption or granted a waiver by the city engineer under the specifications of section 12.16.120 of this chapter. This chapter also applies to land development activities that are smaller than the minimum applicability criteria if such activities are part of a larger common plan of development that meets the following applicability criteria, even though multiple separate and distinct land development activities may take place at different times on different schedules. In addition, all plans must also be reviewed by the environmental services department to ensure that established water quality standards will be maintained during and after development of the site and that post construction runoff levels are consistent with any local and regional watershed plans.
    To prevent the adverse impacts of storm water runoff, the environmental services department has developed a set of performance standards that must be met at new development sites. These standards apply to any construction activity creating 5,000 or more square feet of impervious surface. The following activities may be exempt from these storm water performance criteria:
    1. Any logging or agricultural activity which is consistent with an approved soil conservation plan or a timber management plan prepared or approved by the Soil and Water Conservation District, as applicable;
    2. Additions or modifications to existing single-family structures;
    3. Developments that do not create more than 5,000 square feet of impervious surface, provided they are not part of a larger common development plan;
    4. Repairs to any storm water treatment practice deemed necessary by the city engineer.
    When a site development plan is submitted that qualifies as a redevelopment project as defined in section 12.16.060 of this chapter, decisions on permitting and on-site storm water requirements shall be governed by special storm water sizing criteria found in the storm water design manual. These criteria are dependent on the amount of impervious area created by the redevelopment and its impact on water quality.  Final authorization of all redevelopment projects will be determined after a review by the environmental services department. (Ord. 2002-1015)