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HomeMy WebLinkAboutComments PWE 7/16/2010 ,. #,-..a. . . Memorandum City of Springfield Date: To: July 16, 2010. Andy Limbird, Urban Planner Eric Walter, Civil Engineer DRC2010-00023, Jackson's Food Site Plan From: Subject: I have reviewed the materials provided with the subject application. The finding and conditions outlined below are provided for your use in preparing the land-use decision. \ SANITARY SEWER Finding: Section 4.3cI05.A of the SDC requires that sanitary sewers shall be installed to serve j each new development and to connect developments to existing mains. Additionally, installation of sanitary sewers shall provide sufficient access for maintenance activities. Finding: Pursuant to Chapter 3.03.4.A of the City's Engineering Design Standards and / Procedures Manual and Section 4.4 of Portland's Stormwater Management Manual, solid waste storage areas shall be covered and hydraulically isolated from potential stormwater runoff, and directed to the sanitary sewer system. Plans and detailing demonstrate conformance with this code requirement. ) Finding: Proposed building will be served for sanitary sewer service by connecting to an existing private 4" lateral to the west. This existing 4" lateral runs north and discharges to an existing 8" sanitary sewer main located in Kruse Way. This proposed connection is found to be acceptable and complies with the above sanitary sewer requirements. ./ STORMW ATER MANAGEMENT Finding: Section 4.3-11 O.B of the SDC requires that the Approval Authority shall grant development approval only where adequate public and/or private stormwater management systems provisions have been made as determined by the Public Works Director, consistent with the Engineering Design Standards and Procedures Manual. j Finding: Section 4.3-11 O.D of the SDC requires that run-off from a development shall be directed to an approved stormwater management system with sufficient capacity. / Finding: Section 4.3-11 O.E of the SDC requires new developments to employ drainage management practices, which minimize the amount and rate of surface water run-off into receiving streams, and which promote water quality. ) Finding: To comply with Sections 4.3-11 O.D & E, storm water J;Ulloff from the westerly portion of parking lot will be directed into two existing catch basins. / Finding: To comply with Sections 4.3-11 O.D & E, stormwater runoff from the new roof and new northerly parking lot will be directed into a proposed rain garden infiltration basin. The engineer .' Date Received: 1//'/:k>ID Planner: AL I I \/'" ~t\ . . . of record has provided a storm water management plan and drainage study showing that proposed rain garden infiltration basin design will be adequate for proposed development thus showing conformance with this code requirement. / WATER QUALITY Finding: Under Federal regulation of the Clean Water Act (CW A), Endangered Species Act (ESA), and National Pollutant Discharge Elimination System (NPDES), the City of Springfield has obtained a Municipal Separate Storm Sewer System (MS4) permit. A provision of this permit requires the City demonstrate efforts to reduce the pollution in urban stormwater to the Maximum Extent Practicable (MEP). Finding: Minimum Control Measure 5 requires the City of Springfield to develop, implement and enforce a program to ensure the reduction of pollutants in stormwater runoff to the MEP. The City must also develop and implement strategies that include a combination of structural or non-structural Best Management Practices (BMPs) appropriated for the community. / Finding: As required in Section 4.3-110.E of the SDC, "a development shall be required to employ drainage management practices approved by the Public Works Director and consistent . with Metro Plan policies and the Engineering Design Standards and Procedures Manual." -/ Finding: Section 3.02 of the City's EDSPM states the Public Works Department will accept, as interim design standards for stormwater quality, water quality facilities designed pursuant to the policies and procedures of either the City of Portland (BES), or the Clean Water Services. / Finding: Section 3.03.3.B of the City's EDSPM states all public and private development and redevelopment projects shall employ a system of one or more post-developed BMPs that in combination are designed to achieve at least a 70 percent reduction in the total suspended solids in the runoff generated by that development. Section 3.03.4.E of the manual requires a minimum of 50 percent of the non-building rooftop impervious area on a site shall be treated for 'stormwater quality improvement using vegetative methods. Storm water runoff from the new roof and new parking lot areas will be directed into a proposed water quality rain garden infiltration basin showing compliance with this requirement. Also, there is a small parking lot area to the west that will be directed into two existing catch basins that are being upgraded to double chambered catch basins with fossil filter inserts. Plans and details demonstrate conformance with this water quality requirement. I Finding: The vegetation proposed for use in the rain garden swale will serve as the primary pollutant removal mechanism for the stormwater runoff, and will remove suspended solids and pollutants through the processes of sedimentation and filtration. Satisfactory pollutant removal will occur only when the vegetation has been fully established. Condition: Prior to approval of the fmal site plan, the applicant shall provide an operations and maintenance plan to the City for review to ensure the long-term maintenance and operation of the proposed rain garden infiltration basin. The plan should designate maintenance responsibility for operating and maintaining the system, and should be distributed to all property owners and tenants of the site. Date Received: Planner: AL 1!/~/:;o/l , I ~ :{ ;. . . Condition: To ensure a: fully functioning water quality system and meet objectives of Springfield's MS4 permit, the Springfield Development Code and the EDSPM, the proposed private vegetative water quality rain garden infiltration basin shall be fully vegetated with all vegetation species established prior to approval of Final Site Plan. Alternatively, if this condition cannot be met, the applicant shall provide and maintain additional interim erosion control/water quality measures acceptable to the Public Works Department that will suffice until such time as the basin vegetation becomes fully established. OTHER NOTE: The intent of this listis to give a developer insight about requirements related to public improvements before they develop their property. FEES AND PERMITS SYSTEMS DEVELOPMENT CHARGE: Pay applicable Systems Development Charges when building permits are issued for developments within the City limits or within the Springfield Urban Growth Boundary. (The cost relates to the amount of increase in impervious surface area, transportation trip rates, and plumbing fixture units. Some exceptions apply to Springfield Urban Growth areas.) [Springfield Code Chapter II, Article 11] Systems Development Charges (SDC's) will apply to the construction of buildings and site improvements within the subject site. The Charges will be based upon the rates in effect at the time of permit submittal for buildings or site improvements on each portion ofthe development. OTHER CITY PERMITS: Encroachment Permit or Sewer Hookup Permit (working within right-of-way or public easements) example: new tap to the public storm or sanitary sewer, or adjusting a manhole. [The current rate is $146.50 for processing plus applicable fees and deposits] Land & Drainage Alteration Permits (LDAP). [Contact the Springfield Public Works Department @ 726-5849 for appropriate applications/requirements] '" ''',1/80' ",//~/:;O/D I ,....1.;;1 ".-If":' I , ianner: AL