Item A: Low Impact Development: Results of Review

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removal of significant trees and subsequent actions impacting trees on property subject to an approved conditional use permit, planned unit development, site review, or subdivision that includes a tree removal/preservation plan or conditions related to tree removal or preservation. Exemptions from standards include development activity not subject to land use conditions on certain residential lots under 20,000 square feet. For lots of 20,000 or more square feet and not subject to land use conditions, removal of up to 5 significant trees within a period of 12 consecutive months is exempt. Low Potential: Develop more restrictive standards or reduce exemptions to provide for additional tree preservation. Existing standards already attempt to balance various objectives. Barriers: Complexities of developing and implementing land use regulations. Additional preservation requirements could adversely affect utilization of area for site design, and impact density/lot sizes. Standards for Driveways and Internal Circulation Driveways and access isles typically represent a small percentage of impervious areas on developed sites. There may be some potential to review for consistency between LID practices and private driveway and internal circulation standards; e.g. reduce driveway widths or allow adjustments to encourage use of pervious surfaces and ribbon wheel paths. Low Potential: Encourage, allow or require reductions in impervious area within driveway standards. Barriers: Complexities of developing and implementing land use regulations; potentially competing objectives between LID practices and elements of the standards. B. Local Policy and Regulatory Compliance Both local policy (Eugene’s CSWMP and Stormwater Basin Plans) and compliance with State and Federal regulations (Clean Water Act and Eugene’s NPDES municipal stormwater permit) provide the framework for the city’s adopted stormwater management approach and stormwater development standards, and thus guide implementation of LID practices. Comprehensive Stormwater Management Plan (CSWMP) CSWMP forms the local policy framework to respond to stormwater quality mandates of the Clean Water Act as well as other stormwater-related community values such as the protection/enhancement of wetlands and other natural resources that provide stormwater functions. CSWMP incorporates a multiple- objective stormwater management approach which is wholly consistent with the implementation of LID practices in the community. No changes to CSWMP are necessary to remove barriers or increase use of LID practices in the community. Low Potential: CSWMP is already consistent with the implementation of LID practices. Barriers: Complexities of modifying land use plans/policies (CSWMP was adopted as a refinement to the Metro Plan). National Pollutant Discharge Elimination System (NPDES) Permit Eugene’s NPDES permit, a municipal stormwater (MS4) permit administered by Oregon Department of Environmental Quality (DEQ) for direct discharge into the Willamette River and related indirectly draining waterways, is currently undergoing a periodic renewal application process. As part of the renewal requirements Eugene is required to review its programs and activities to make sure that they collectively reduce pollutants to the maximum extent practicable, contain certain program elements, and address certain problem pollutants. While the current NPDES permit provisions generally support and complement LID practices, the permit itself does not mandate or implement use of LID practices. It is anticipated for renewal of the City’s NPDES MS4 permit that DEQ will incorporate additional permit conditions related to LID practices including requirements to: Review codes and development standards and, where possible, remove barriers to LID practices. September, 2008 City of Eugene LID Report, Page 10 of 26