Item 2D: Resolution Concerning Modifciation of Stormwater SDC

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ECC UGENE ITY OUNCIL AIS GENDA TEM UMMARY Adoption of Resolution 4876 Amending Local Stormwater Systems Development Charge Methodology Concerning Credits; and Amending Resolution No. 4740 Meeting Date: June 12, 2006 Agenda Item Number: 2D Department: Public Works Staff Contact: Fred McVey www.eugene-or.gov Contact Telephone Number: 682-5216 ISSUE STATEMENT The proposed resolution modifies the stormwater system development charge (SDC) methodology to incorporate additional stormwater SDC credits associated with stormwater quality facilities and pollution reduction measures. BACKGROUND Stormwater quality credits for SDCs are based on a public system benefit from development treating stormwater quality through privately constructed and maintained facilities and effective impervious area reduction techniques. Developments utilizing private means for water quality treatment can reduce the demand for downstream public facilities for water quality treatment. Establishing stormwater quality SDC credits provides a general recognition of reduced demand and provides a modest incentive for meeting and exceeding minimum water quality treatment requirements. The original development of proposed stormwater quality SDC credit provisions was accomplished with the involvement of a Stormwater User Fee and SDC Department Advisory Committee (DAC). The recommendation coming out of the DAC included: “A one-time stormwater SDC credit will be provided for approved water quality treatment Best Management Practices (BMPs) that are in excess of the minimum requirements, in recognition that stormwater runoff from developments utilizing such BMPs requires fewer downstream public facilities for treatment. The sizing and degree of treatment provided by the BMPs, and demonstration of exceedence of minimum requirements, will be based on the methodology outlined in the City’s proposed Stormwater Management Manual.” The currently proposed credit provisions are consistent in principle with those reviewed with the DAC and have been updated to reflect the City’s currently-proposed stormwater development standards. Implementation of stormwater quality SDC credits is related to adoption of stormwater development standards which require water quality treatment at sites of new development. As indicated in the DAC recommendations, adopted standards provide a basis for evaluation of the degree of impact reduction of a development. The proposed credits recognize impact reduction and provide incentives for pollution reduction across three types of development sites: 1) those not subject to the standards for stormwater pollution reduction but which treat all or a portion (minimum 20%) of the impervious area of the development site; 2) sites where a portion of the site impervious area is subject to the standards for stormwater pollution reduction but treat runoff from 20% or more impervious area than the minimum required; and, 3) sites where all of the site impervious area is subject to the standards for stormwater pollution reduction which reduce a minimum of 20% of the total impervious area of the development site through use of impervious area reduction techniques. More detail is provided in the proposed revisions to the SDC methodologies as shown in Exhibit A to the proposed resolution (Attachment A). L:\CMO\2006 Council Agendas\M060612\S0606122D.doc