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<br />In researching how other municipalities have implemented stormwater development standards, <br />? <br /> <br />staff determined that the exemption for single-family residential developments on existing lots, <br />and minor partitions is consistent with how several other agencies have applied these standards, <br />although admittedly there is a wide spectrum of applicability criteria and exemptions. Locally, <br />the City of Springfield likewise exempts single-family in-fills and partitions treating stormwater <br />runoff. <br />On existing residential lots of record, site specific constraints (e.g. steep slopes, soil types, <br />? <br /> <br />sensitive natural resources, limited space) may prevent developers from finding suitable <br />locations for stormwater facilities. Stormwater infrastructure may already in place, further <br />constraining options for pollution reduction and flow control facilities. <br />Lack of proper maintenance is considered to be the leading cause of failure of on-site stormwater <br />? <br /> <br />control facilities. For single-family sites, developers may be responsible for maintenance for a <br />certain period of time (e.g. via a maintenance bond), but at some point the maintenance of <br />facilities would become the responsibility of the property owner and can be overlooked when <br />property owners change. New owners may not adequately understand the requirement for <br />maintenance. In some cases, the need for maintenance may not be acknowledged until a <br />significant problem such as flooding occurs. <br />Stormwater runoff from residential sites has been shown to have lower concentrations of most <br />? <br /> <br />pollutants of concern relative to runoff from industrial and commercial sites. <br />The proposed stormwater development standards comprise one element of a multi-faceted <br />? <br /> <br />stormwater program which includes the following activities expected to help address municipal <br />stormwater, including runoff from small residential sites on existing lots of record and partitions: <br />stormwater education, neighborhood water quality capital projects, bacteria pilot study, erosion <br />prevention and construction site management, street sweeping and other operations and <br />maintenance activities. <br />With the proposed exemptions, staff is comfortable that it can ensure there will be adequate <br />? <br /> <br />resources for permitting, maintenance, inspections, and enforcement, while still maintaining <br />broad coverage of the new standards. <br /> <br />Proposed Ordinance and Implementation <br />Stormwater development standards are regulations for locating, designing, constructing, and <br />maintaining stormwater facilities, applicable to new development. The existing land use code <br />addresses only stormwater destination (flood control). The proposed ordinance amends the land use <br />code to also address stormwater quality from new development via pollution reduction, flow control, <br />oil control, and source control requirements as well as operation and maintenance standards for <br />stormwater facilities. <br /> <br />A companion design manual, the Eugene Stormwater Management Manual will be adopted <br />administratively. A draft of the manual is available on the City’s web page: www.eugene-or.gov <br />under Public Works>PW Services>Stormwater. <br /> <br /> <br />RELATED CITY POLICIES <br />The proposed code amendments are intended to implement stormwater development standards as a <br />component of the City’s Stormwater Program initiated with the adoption of the Comprehensive <br />Stormwater Management Plan (CSWMP) and as required through the Department of Environmental <br />Quality (DEQ)’s issuance of the City’s National Pollutant Discharge Elimination System (NPDES) <br />Permit. <br /> <br /> L:\CMO\2006 Council Agendas\M060508\S0605087.doc <br />