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SECTION 1 Introduction NPDES Six Minimum Control Measures • Public Education & Outreach • Public Involvement & Participation • Illicit Discharge & Elimination • Construction Site Stormwater Control • Post - Construction Stormwater Management • Pollution Prevention in Municipal Operations Lane County provides stormwater services in accordance with its Stormwater Management Plan (SWMP). Many of the services in the River Road -Santa Clara area are provided by the City of Eugene on behalf of Lane County through Inter - governmental Agreements (IGAs). Lane County's SWMP was updated in July of 2011 and a new Stormwater IGA with the City of Eugene was approved in December 2011. Lane County's current NPDES was to expire on December 31, 2011 but has been administratively extended by the DEQ until a new permit is negotiated and issued. Drywell Elimination Program The regulatory drivers for eliminating most or all public drywells are described in this Basin Plan in Section 4.1.2. Approximately half of the City of Eugene's publicly owned and managed drywells, and most of Lane County's owned and managed drywells, are in the River Road -Santa Clara area. At the time of this information update, the Oregon DEQ has not yet issued any WPCF permits in Oregon, with the exception of City of Portland's permit. While permit conditions are not finalized, based upon the latest draft WPCF permit template, the City of Eugene is proceeding with its strategy, described in Section 4.3 of this Plan, to eliminate public drywells. Once a permit is issued, the City will re- evaluate and refine its strategy if necessary. The County is currently prioritizing risk levels for its drywells and is reevaluating its drywell management /decommissioning strategy with regard to changes in the latest draft WPCF permit template. Where the City and County have drywells in the same area, the agencies will continue to seek ways to partner on projects for the sake of efficiency and cost - effectiveness. Capital project concepts identified in the document to address UIC decommissioning are simply starting points for the project design and implementation. Final designs are likely to differ from conceptual design concepts based on changing circumstances and additional information gathered during the design process. The South of Horn Lane UIC cluster, for example, identified on- street raingardens as the conceptual decommissioning strategy. However at this time, large - scale street improvements are not likely in the near future for this area, and other options such as individual rain gardens will need to be considered. As another example, one of the City's first UIC capital projects to be constructed (A1 -8 -UIC, Escalante, further described in the following paragraph) was conceptually identified as a piped decommissioning project. However, through the dynamic design process a more advantageous solution was developed resulting in a neighborhood vegetated swale as the final design. Capital projects Al -3 -UIC, A14-UIC (Shirley 1 &2), and Al -8 -UIC ( Escalante) were selected for implementation by the City of Eugene first because they include drywells with the least N:ASTORMWATER \City of EugencARR_SC Stormwater Basin Plan\2012 Document \Master_ Plan _9- 18- 12_DR-AFT Word Version.doc 1 -6