Item A: Green Infrastructure and Low-Impact Development

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all six stormwater basins was that public capital facilities at specific locations would be the most appropriate and cost-effective option. To address predicted water quality problems related to development, the conclusion for all six stormwater basins was that private on-site controls would be the most appropriate option. Public capital facilities would not fully address the development-related water quality problem given the limited nature and location of vacant land to site public water quality facilities. The public cost to maintain large capital facilities was also a consideration. The basin planning analysis confirmed the appropriateness of on-site controls for development and provided justification for pursuing the recommended course of action: adoption of city-wide stormwater quality development standards. The basic elements of a future stormwater development standards ordinance were established during the basin planning process including what the standards would be, where and how they would apply, and what the public and private maintenance responsibilities would be. Specific elements of a future stormwater development standards ordinance were assigned to a separate process. The basin planning stormwater management strategies were reviewed by the Public Works Stormwater Department Advisory Committee from February 1999 through June 2000, and subsequently presented to neighborhood and interest groups. By August 2002, updated Basin Plans had been completed for six of Eugene’s seven stormwater basins: Amazon, Willow Creek, Bethel-Danebo, Willakenzie, Willamette River, and Laurel Hill (see attached figure for basin locations and approximate boundaries). An initial study towards the development of a River Road - Santa Clara Basin Plan was also drafted by August 2002 but was not completed pending collaboration with Lane County on addressing inter-jurisdictional issues and the need for additional stormwater system information in that area. The new Basin Plans, adopted administratively in 2003, guide the management of stormwater throughout the study area. They are used by City staff for background/contextual information, for development of the City’s biennial Capital Improvement Program, for contextual support for proposed development standards and waterway protections, and for evaluating technical information about the stormwater system. The Basin Plans are not used to regulate conduct or activities of the public. Stormwater Development Standards Subsequent to the completion of the six new Basin Plans, separate implementation processes were initiated including the development of a proposed stormwater development standards ordinanceand associated design manual. A subcommittee of the Stormwater Department Advisory Committee volunteered to review the implementing ordinance for consistency with the basin planning context, and for appropriateness in implementation at the higher level of detail reflected in the ordinance. The stormwater development standards ordinance now under consideration by City Council primarily addresses the destination (i.e. conveyance) of stormwater for flood control and the quality of stormwater from developing sites. The destination provisions in the ordinance (Section 9.6791) are not new code requirements, but already exist in City code (Section 9.6510). The ordinance moves the destination provisions so that stormwater standards related to development are in one location of City code for clarity. The destination requirements ensure that there is adequate capacity in the system to convey stormwater from the developing site and those stormwater conveyance systems for developing sites meet a certain level of flood protection. The destination provisions of the ordinance provide the basic design standards but do not require that stormwater be conveyed by any particular