Ordinance No. 20521 - Laserfiche WebLink

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Prioritizing the available stormwater quality facilities in a hierarchical order in which infiltration and filtration are prioritized above off -site stormwater quality management, while still allowing off -site treatment when site conditions or the desired development of the site renders infiltration and filtration facilities impractical will: (1) facilitate (and encourages) a development's incorporation of site - specific management practices that mimic natural surface or predevelopment hydrological functions as much as practicable, optimizing on -site retention based on site conditions; (2) result in reduced site specific post- development stormwater runoff, volume, duration and rates of discharge to the municipal separate storm sewer system (MS4), thereby minimizing hydrological and water quality impacts from impervious surface; (3) encourage and facilitate the applicable and practical uses of low- impact - development or green infrastructure, while allowing other stormwater quality management techniques then use of these approaches is impractical; (4) further the intent to capture and treat 80% of the annual average runoff volume; and, (5) encourage design and implementation techniques intended to minimize impervious surfaces and reduces stormwater runoff. • Metro Plan Policies -The above - described stormwater development standards are consistent with the following Metro Plan Policies: Environmental Resources Element: 18. Local governments shall develop plans and programs which carefully manage development on hillsides and in water bodies, and restrict development in wetlands in order to protect the scenic quality, surface water and groundwater quality, forest values, vegetation, and wildlife values of those areas. 21. Local government shall continue to monitor, to plan for, and to enforce applicable air and water quality standards and shall cooperate in meeting applicable federal, state, and local air and water quality standards. 25. Eugene shall maintain and improve and Springfield shall adopt hillside development regulations. Public Facilities and Services Element - Services to Development Within the Urban Growth Boundary: Stormwater G.13 Improve surface and ground water quality and quantity in the metropolitan area by developing regulations or instituting programs for stormwater to: a. Increase public awareness of techniques and practices private individuals can employ to help correct water quality and quantity problems; b. Improve management of industrial and commercial operations to reduce negative water quality and quantity impacts; c. Regulate site planning for new development and construction to better manage pre- and post - construction storm runoff, including erosion, velocity, pollutant loading, and drainage; d. Increase storage and retention and natural infiltration ofstorm runoff to lower and delay peak storm flows and to settle out pollutants prior to discharge into regulated waterways; Exhibit A to Ordinance No. 20521 8 of 10 Findings of Consistency