Admin Order 58-14-01-F - Laserfiche WebLink

Home Browse Search

1.13 STORMWATER SYSTEM DEVELOPMENT CHARGES Stormwater Systems Development Charges (SDC's) provide a funding mechanism to account for the costs and value of public infrastructure system capacity required by new development. SDC methodology includes a rate for providing stormwater quantity and quality capacity and a rate for providing public off -site low impact development (LID) water quality facilities off -site. The LID component provides for off -site public infiltration /filtration stormwater quality treatment to be paid only by development subject to the 2014 low impact development water quality treatment standards that does not construct private on -site stormwater infiltration or filtration treatment facilities. The LID component cost of the increased SDC is roughly comparable to the cost of constructing an equivalent on -site stormwater treatment facility. 1.13.1 Credits Stormwater quantity credits for SDC's and Utility Billing monthly user fees are based on a public system benefit from development reducing the quantity of stormwater entering the public system through on -site retention methods. Developments utilizing private means for reducing the quantity of water discharged from a development site to the public system can reduce the demand for additional capacity in downstream public water conveyance facilities. Establishing stormwater quantity SDC and user fee credits provides a general recognition of reduced demand. Stormwater quality credits for SDC's and user fees 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 operation and maintenance of water quality treatment can reduce the demand for downstream public facilities for water quality treatment. Establishing stormwater quality SDC and user fee credits provides a general recognition of reduced demand and provides a modest incentive for meeting and exceeding minimum water quality treatment requirements. Implementation of stormwater quality SDC and user fee credits is related to adoption of stormwater development standards which require water quality treatment at sites of new development. Adopted standards provide a basis for evaluation of the degree of impact reduction of a development. These credits recognize impact reduction and provide incentives for stormwater quality across three types of development sites: Those not subject to the standards for stormwater quality but which treat all or a portion (minimum 20 %) of the total impervious area of the development site; Sites where a portion of the site impervious area is subject to the standards for stormwater quality but which treat runoff from 20% or more impervious area than the minimum required, or which reduce a minimum of 20% of the total impervious area of the development site through use of impervious area reduction techniques; and, Sites where all of the site impervious area is subject to the standards for stormwater quality but which reduce a minimum of 20% of the total impervious area of the development through the use of impervious area reduction techniques. Stormwater Management Manual 1 -24 Eugene 2014